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1 | /* altairz80_sio.c: MITS Altair serial I/O card |
2 | ||
3 | Copyright (c) 2002-2008, Peter Schorn | |
4 | ||
5 | Permission is hereby granted, free of charge, to any person obtaining a | |
6 | copy of this software and associated documentation files (the "Software"), | |
7 | to deal in the Software without restriction, including without limitation | |
8 | the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | and/or sell copies of the Software, and to permit persons to whom the | |
10 | Software is furnished to do so, subject to the following conditions: | |
11 | ||
12 | The above copyright notice and this permission notice shall be included in | |
13 | all copies or substantial portions of the Software. | |
14 | ||
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | PETER SCHORN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | ||
22 | Except as contained in this notice, the name of Peter Schorn shall not | |
23 | be used in advertising or otherwise to promote the sale, use or other dealings | |
24 | in this Software without prior written authorization from Peter Schorn. | |
25 | ||
26 | Based on work by Charles E Owen (c) 1997 | |
27 | ||
28 | These functions support a simulated MITS 2SIO interface card. | |
29 | The card had two physical I/O ports which could be connected | |
30 | to any serial I/O device that would connect to a current loop, | |
31 | RS232, or TTY interface. Available baud rates were jumper | |
32 | selectable for each port from 110 to 9600. | |
33 | ||
34 | All I/O is via programmed I/O. Each device has a status port | |
35 | and a data port. A write to the status port can select | |
36 | some options for the device (0x03 will reset the port). | |
37 | A read of the status port gets the port status: | |
38 | ||
39 | +---+---+---+---+---+---+---+---+ | |
40 | | X | X | X | X | X | X | O | I | | |
41 | +---+---+---+---+---+---+---+---+ | |
42 | ||
43 | I - A 1 in this bit position means a character has been received | |
44 | on the data port and is ready to be read. | |
45 | O - A 1 in this bit means the port is ready to receive a character | |
46 | on the data port and transmit it out over the serial line. | |
47 | ||
48 | A read to the data port gets the buffered character, a write | |
49 | to the data port writes the character to the device. | |
50 | */ | |
51 | ||
52 | #include <ctype.h> | |
53 | ||
54 | #include "altairz80_defs.h" | |
55 | #include "sim_sock.h" | |
56 | #include "sim_tmxr.h" | |
57 | #include <time.h> | |
58 | #include <assert.h> | |
59 | #if UNIX_PLATFORM | |
60 | #include <glob.h> | |
61 | #elif defined (_WIN32) | |
62 | #include <windows.h> | |
63 | #endif | |
64 | ||
65 | #define UNIT_V_SIO_ANSI (UNIT_V_UF + 0) /* ANSI mode, strip bit 8 on output */ | |
66 | #define UNIT_SIO_ANSI (1 << UNIT_V_SIO_ANSI) | |
67 | #define UNIT_V_SIO_UPPER (UNIT_V_UF + 1) /* upper case mode */ | |
68 | #define UNIT_SIO_UPPER (1 << UNIT_V_SIO_UPPER) | |
69 | #define UNIT_V_SIO_BS (UNIT_V_UF + 2) /* map delete to backspace */ | |
70 | #define UNIT_SIO_BS (1 << UNIT_V_SIO_BS) | |
71 | #define UNIT_V_SIO_VERBOSE (UNIT_V_UF + 3) /* verbose mode, i.e. show error messages */ | |
72 | #define UNIT_SIO_VERBOSE (1 << UNIT_V_SIO_VERBOSE) | |
73 | #define UNIT_V_SIO_MAP (UNIT_V_UF + 4) /* mapping mode on */ | |
74 | #define UNIT_SIO_MAP (1 << UNIT_V_SIO_MAP) | |
75 | #define UNIT_V_SIO_BELL (UNIT_V_UF + 5) /* ^G (bell character) rings bell */ | |
76 | #define UNIT_SIO_BELL (1 << UNIT_V_SIO_BELL) | |
77 | #define UNIT_V_SIO_INTERRUPT (UNIT_V_UF + 6) /* create keyboard interrupts */ | |
78 | #define UNIT_SIO_INTERRUPT (1 << UNIT_V_SIO_INTERRUPT) | |
79 | #define UNIT_V_SIO_SLEEP (UNIT_V_UF + 7) /* sleep after keyboard status check */ | |
80 | #define UNIT_SIO_SLEEP (1 << UNIT_V_SIO_SLEEP) | |
81 | ||
82 | #define UNIT_V_SIMH_VERBOSE (UNIT_V_UF + 0) /* verbose mode for SIMH pseudo device */ | |
83 | #define UNIT_SIMH_VERBOSE (1 << UNIT_V_SIMH_VERBOSE) | |
84 | #define UNIT_V_SIMH_TIMERON (UNIT_V_UF + 1) /* SIMH pseudo device timer generate interrupts */ | |
85 | #define UNIT_SIMH_TIMERON (1 << UNIT_V_SIMH_TIMERON) | |
86 | ||
87 | #define TERMINALS 4 /* lines per mux */ | |
88 | #define SIO_CAN_READ 0x01 /* bit 0 is set iff character available */ | |
89 | #define SIO_CAN_WRITE 0x02 /* bit 1 is set iff character can be sent */ | |
90 | #define SIO_RESET 0x03 /* Command to reset SIO */ | |
91 | #define VGSIO_CAN_READ 0x02 /* bit 1 is set iff character available */ | |
92 | #define VGSIO_CAN_WRITE 0x01 /* bit 0 is set iff character can be sent */ | |
93 | #define KBD_HAS_CHAR 0x40 /* bit 6 is set iff character available */ | |
94 | #define KBD_HAS_NO_CHAR 0x01 /* bit 0 is set iff no character is available */ | |
95 | ||
96 | #define BACKSPACE_CHAR 0x08 /* backspace character */ | |
97 | #define DELETE_CHAR 0x7f /* delete character */ | |
98 | #define CONTROLC_CHAR 0x03 /* control C character */ | |
99 | #define CONTROLG_CHAR 0x07 /* control G char., rings bell when displayed */ | |
100 | #define CONTROLZ_CHAR 0x1a /* control Z character */ | |
101 | ||
102 | #define PORT_TABLE_SIZE 256 /* size of port mapping table */ | |
103 | #define SLEEP_ALLOWED_START_DEFAULT 100 /* default initial value for sleepAllowedCounter*/ | |
104 | ||
105 | static t_stat sio_set_verbose (UNIT *uptr, int32 value, char *cptr, void *desc); | |
106 | static t_stat simh_dev_set_timeron (UNIT *uptr, int32 value, char *cptr, void *desc); | |
107 | static t_stat simh_dev_set_timeroff (UNIT *uptr, int32 value, char *cptr, void *desc); | |
108 | static t_stat sio_reset(DEVICE *dptr); | |
109 | static t_stat sio_attach(UNIT *uptr, char *cptr); | |
110 | static t_stat sio_detach(UNIT *uptr); | |
111 | static t_stat ptr_reset(DEVICE *dptr); | |
112 | static t_stat ptp_reset(DEVICE *dptr); | |
113 | static t_stat toBool(char tf, int *result); | |
114 | static t_stat sio_dev_set_port(UNIT *uptr, int32 value, char *cptr, void *desc); | |
115 | static t_stat sio_dev_show_port(FILE *st, UNIT *uptr, int32 val, void *desc); | |
116 | static t_stat sio_dev_set_interrupton(UNIT *uptr, int32 value, char *cptr, void *desc); | |
117 | static t_stat sio_dev_set_interruptoff(UNIT *uptr, int32 value, char *cptr, void *desc); | |
118 | static t_stat sio_svc(UNIT *uptr); | |
119 | static t_stat simh_dev_reset(DEVICE *dptr); | |
120 | static t_stat simh_svc(UNIT *uptr); | |
121 | int32 nulldev (const int32 port, const int32 io, const int32 data); | |
122 | int32 sr_dev (const int32 port, const int32 io, const int32 data); | |
123 | int32 simh_dev (const int32 port, const int32 io, const int32 data); | |
124 | int32 sio0d (const int32 port, const int32 io, const int32 data); | |
125 | int32 sio0s (const int32 port, const int32 io, const int32 data); | |
126 | int32 sio1d (const int32 port, const int32 io, const int32 data); | |
127 | int32 sio1s (const int32 port, const int32 io, const int32 data); | |
128 | void printMessage(void); | |
129 | void do_SIMH_sleep(void); | |
130 | static void pollConnection(void); | |
131 | static int32 mapCharacter(int32 ch); | |
132 | static void checkSleep(void); | |
133 | static void voidSleep(void); | |
134 | ||
135 | extern int32 getBankSelect(void); | |
136 | extern void setBankSelect(const int32 b); | |
137 | extern uint32 getCommon(void); | |
138 | extern uint8 GetBYTEWrapper(const uint32 Addr); | |
139 | extern uint32 sim_map_resource(uint32 baseaddr, uint32 size, uint32 resource_type, | |
140 | int32 (*routine)(const int32, const int32, const int32), uint8 unmap); | |
141 | ||
142 | extern int32 chiptype; | |
143 | extern const t_bool rtc_avail; | |
144 | extern FILE *sim_log; | |
145 | extern uint32 PCX; | |
146 | extern int32 sim_switches; | |
147 | extern const char *scp_error_messages[]; | |
148 | extern int32 SR; | |
149 | extern UNIT cpu_unit; | |
150 | extern volatile int32 stop_cpu; | |
151 | extern int32 sim_interval; | |
152 | ||
153 | /* SIMH pseudo device status registers */ | |
154 | /* ZSDOS clock definitions */ | |
155 | static time_t ClockZSDOSDelta = 0; /* delta between real clock and Altair clock */ | |
156 | static int32 setClockZSDOSPos = 0; /* determines state for receiving address of parameter block */ | |
157 | static int32 setClockZSDOSAdr = 0; /* address in M of 6 byte parameter block for setting time */ | |
158 | static int32 getClockZSDOSPos = 0; /* determines state for sending clock information */ | |
159 | ||
160 | /* CPM3 clock definitions */ | |
161 | static time_t ClockCPM3Delta = 0; /* delta between real clock and Altair clock */ | |
162 | static int32 setClockCPM3Pos = 0; /* determines state for receiving address of parameter block */ | |
163 | static int32 setClockCPM3Adr = 0; /* address in M of 5 byte parameter block for setting time */ | |
164 | static int32 getClockCPM3Pos = 0; /* determines state for sending clock information */ | |
165 | static int32 daysCPM3SinceOrg = 0; /* days since 1 Jan 1978 */ | |
166 | ||
167 | /* interrupt related */ | |
168 | static uint32 timeOfNextInterrupt; /* time when next interrupt is scheduled */ | |
169 | int32 timerInterrupt = FALSE; /* timer interrupt pending */ | |
170 | int32 timerInterruptHandler = 0x0fc00; /* default address of interrupt handling routine */ | |
171 | static int32 setTimerInterruptAdrPos= 0; /* determines state for receiving timerInterruptHandler */ | |
172 | static int32 timerDelta = 100; /* interrupt every 100 ms */ | |
173 | static int32 setTimerDeltaPos = 0; /* determines state for receiving timerDelta */ | |
174 | ||
175 | /* stop watch and timer related */ | |
176 | static uint32 stopWatchDelta = 0; /* stores elapsed time of stop watch */ | |
177 | static int32 getStopWatchDeltaPos = 0; /* determines the state for receiving stopWatchDelta */ | |
178 | static uint32 stopWatchNow = 0; /* stores starting time of stop watch */ | |
179 | static int32 markTimeSP = 0; /* stack pointer for timer stack */ | |
180 | ||
181 | /* default time in microseconds to sleep for SIMHSleepCmd */ | |
182 | #if defined (_WIN32) | |
183 | static uint32 SIMHSleep = 1000; /* Sleep uses milliseconds */ | |
184 | #elif defined (__MWERKS__) && defined (macintosh) | |
185 | static uint32 SIMHSleep = 0; /* no sleep on Macintosh OS9 */ | |
186 | #else | |
187 | static uint32 SIMHSleep = 100; /* on other platforms 100 micro seconds is good enough */ | |
188 | #endif | |
189 | static uint32 sleepAllowedCounter = 0; /* only sleep on no character available when == 0 */ | |
190 | static uint32 sleepAllowedStart = SLEEP_ALLOWED_START_DEFAULT; /* default start for above counter */ | |
191 | ||
192 | /* miscellaneous */ | |
193 | static int32 versionPos = 0; /* determines state for sending device identifier */ | |
194 | static int32 lastCPMStatus = 0; /* result of last attachCPM command */ | |
195 | static int32 lastCommand = 0; /* most recent command processed on port 0xfeh */ | |
196 | static int32 getCommonPos = 0; /* determines state for sending the 'common' register */ | |
197 | ||
198 | /* support for wild card expansion */ | |
199 | #if UNIX_PLATFORM | |
200 | static glob_t globS; | |
201 | static uint32 globPosNameList = 0; | |
202 | static int32 globPosName = 0; | |
203 | static int32 globValid = FALSE; | |
204 | static int32 globError = 0; | |
205 | #elif defined (_WIN32) | |
206 | static WIN32_FIND_DATA FindFileData; | |
207 | static HANDLE hFind = INVALID_HANDLE_VALUE; | |
208 | static int32 globFinished = FALSE; | |
209 | static int32 globValid = FALSE; | |
210 | static int32 globPosName = 0; | |
211 | #endif | |
212 | ||
213 | /* SIO status registers */ | |
214 | static int32 warnLevelSIO = 3; /* display at most 'warnLevelSIO' times the same warning */ | |
215 | static int32 warnUnattachedPTP = 0; /* display a warning message if < warnLevel and SIO set to | |
216 | VERBOSE and output to PTP without an attached file */ | |
217 | static int32 warnUnattachedPTR = 0; /* display a warning message if < warnLevel and SIO set to | |
218 | VERBOSE and attempt to read from PTR without an attached file */ | |
219 | static int32 warnPTREOF = 0; /* display a warning message if < warnLevel and SIO set to | |
220 | VERBOSE and attempt to read from PTR past EOF */ | |
221 | static int32 warnUnassignedPort = 0; /* display a warning message if < warnLevel and SIO set to | |
222 | VERBOSE and attempt to perform IN or OUT on an unassigned PORT */ | |
223 | ||
224 | int32 keyboardInterrupt = FALSE; /* keyboard interrupt pending */ | |
225 | uint32 keyboardInterruptHandler = 0x0038;/* address of keyboard interrupt handler */ | |
226 | ||
227 | static TMLN TerminalLines[TERMINALS] = { /* four terminals */ | |
228 | { 0 } | |
229 | }; | |
230 | ||
231 | static TMXR altairTMXR = { /* mux descriptor */ | |
232 | TERMINALS, 0, 0, TerminalLines | |
233 | }; | |
234 | ||
235 | static UNIT sio_unit = { | |
236 | UDATA (&sio_svc, UNIT_ATTABLE | UNIT_SIO_MAP | UNIT_SIO_SLEEP, 0), | |
237 | 100000, /* wait */ | |
238 | FALSE, /* u3 = FALSE, no character available in buffer */ | |
239 | FALSE, /* u4 = FALSE, terminal input is not attached to a file */ | |
240 | FALSE, /* u5 = FALSE, terminal input has not yet reached EOF */ | |
241 | 0 /* u6 = 0, not used */ | |
242 | }; | |
243 | ||
244 | static REG sio_reg[] = { | |
245 | { DRDATA (SIOWLEV, warnLevelSIO, 32) }, | |
246 | { DRDATA (WRNUPTP, warnUnattachedPTP, 32) }, | |
247 | { DRDATA (WRNUPTR, warnUnattachedPTR, 32) }, | |
248 | { DRDATA (WRNPTRE, warnPTREOF, 32) }, | |
249 | { DRDATA (WRUPORT, warnUnassignedPort, 32) }, | |
250 | { HRDATA (FILEATT, sio_unit.u4, 8), REG_RO }, /* TRUE iff terminal input is attached to a file */ | |
251 | { HRDATA (FILEEOF, sio_unit.u5, 8), REG_RO }, /* TRUE iff terminal input file has reached EOF */ | |
252 | { HRDATA (TSTATUS, sio_unit.u3, 8) }, /* TRUE iff a character available in sio_unit.buf */ | |
253 | { DRDATA (TBUFFER, sio_unit.buf, 8) }, /* input buffer for one character */ | |
254 | { DRDATA (KEYBDI, keyboardInterrupt, 3), REG_RO }, | |
255 | { HRDATA (KEYBDH, keyboardInterruptHandler, 16) }, | |
256 | { NULL } | |
257 | }; | |
258 | ||
259 | static MTAB sio_mod[] = { | |
260 | { UNIT_SIO_ANSI, 0, "TTY", "TTY", NULL }, /* keep bit 8 as is for output */ | |
261 | { UNIT_SIO_ANSI, UNIT_SIO_ANSI, "ANSI", "ANSI", NULL }, /* set bit 8 to 0 before output */ | |
262 | { UNIT_SIO_UPPER, 0, "ALL", "ALL", NULL }, /* do not change case of input characters */ | |
263 | { UNIT_SIO_UPPER, UNIT_SIO_UPPER, "UPPER", "UPPER", NULL }, /* change input characters to upper case */ | |
264 | { UNIT_SIO_BS, 0, "BS", "BS", NULL }, /* map delete to backspace */ | |
265 | { UNIT_SIO_BS, UNIT_SIO_BS, "DEL", "DEL", NULL }, /* map backspace to delete */ | |
266 | { UNIT_SIO_VERBOSE, 0, "QUIET", "QUIET", NULL }, /* quiet, no error messages */ | |
267 | { UNIT_SIO_VERBOSE, UNIT_SIO_VERBOSE, "VERBOSE", "VERBOSE", &sio_set_verbose }, | |
268 | /* verbose, display warning messages */ | |
269 | { UNIT_SIO_MAP, 0, "NOMAP", "NOMAP", NULL }, /* disable character mapping */ | |
270 | { UNIT_SIO_MAP, UNIT_SIO_MAP, "MAP", "MAP", NULL }, /* enable all character mapping */ | |
271 | { UNIT_SIO_BELL, 0, "BELL", "BELL", NULL }, /* enable bell character */ | |
272 | { UNIT_SIO_BELL, UNIT_SIO_BELL, "NOBELL", "NOBELL", NULL }, /* suppress ringing the bell */ | |
273 | { UNIT_SIO_SLEEP, 0, "NOSLEEP", "NOSLEEP", NULL }, /* no sleep after keyboard status check */ | |
274 | { UNIT_SIO_SLEEP, UNIT_SIO_SLEEP, "SLEEP", "SLEEP", NULL }, /* sleep after keyboard status check */ | |
275 | /* no keyboard interrupts */ | |
276 | { UNIT_SIO_INTERRUPT, 0, "NOINTERRUPT","NOINTERRUPT",&sio_dev_set_interruptoff }, | |
277 | /* create keyboard interrupts */ | |
278 | { UNIT_SIO_INTERRUPT, UNIT_SIO_INTERRUPT, "INTERRUPT","INTERRUPT",&sio_dev_set_interrupton }, | |
279 | { MTAB_XTD|MTAB_VDV|MTAB_VAL, 0, "PORT", "PORT", &sio_dev_set_port, &sio_dev_show_port }, | |
280 | { 0 } | |
281 | }; | |
282 | ||
283 | DEVICE sio_dev = { | |
284 | "SIO", &sio_unit, sio_reg, sio_mod, | |
285 | 1, 10, 31, 1, 8, 8, | |
286 | NULL, NULL, &sio_reset, | |
287 | NULL, &sio_attach, &sio_detach, | |
288 | NULL, 0, 0, | |
289 | NULL, NULL, NULL }; | |
290 | ||
291 | static UNIT ptr_unit = { | |
292 | UDATA (NULL, UNIT_SEQ | UNIT_ATTABLE | UNIT_ROABLE, 0) | |
293 | }; | |
294 | ||
295 | static REG ptr_reg[] = { | |
296 | { HRDATA (STAT, ptr_unit.u3, 8) }, | |
297 | { NULL } | |
298 | }; | |
299 | ||
300 | DEVICE ptr_dev = { | |
301 | "PTR", &ptr_unit, ptr_reg, NULL, | |
302 | 1, 10, 31, 1, 8, 8, | |
303 | NULL, NULL, &ptr_reset, | |
304 | NULL, NULL, NULL, | |
305 | NULL, 0, 0, | |
306 | NULL, NULL, NULL | |
307 | }; | |
308 | ||
309 | static UNIT ptp_unit = { | |
310 | UDATA (NULL, UNIT_SEQ + UNIT_ATTABLE, 0) | |
311 | }; | |
312 | ||
313 | DEVICE ptp_dev = { | |
314 | "PTP", &ptp_unit, NULL, NULL, | |
315 | 1, 10, 31, 1, 8, 8, | |
316 | NULL, NULL, &ptp_reset, | |
317 | NULL, NULL, NULL, | |
318 | NULL, 0, 0, | |
319 | NULL, NULL, NULL | |
320 | }; | |
321 | ||
322 | /* Synthetic device SIMH for communication | |
323 | between Altair and SIMH environment using port 0xfe */ | |
324 | static UNIT simh_unit = { | |
325 | UDATA (&simh_svc, 0, 0), KBD_POLL_WAIT | |
326 | }; | |
327 | ||
328 | static REG simh_reg[] = { | |
329 | { DRDATA (CZD, ClockZSDOSDelta, 32) }, | |
330 | { DRDATA (SCZP, setClockZSDOSPos, 8), REG_RO }, | |
331 | { HRDATA (SCZA, setClockZSDOSAdr, 16), REG_RO }, | |
332 | { DRDATA (GCZP, getClockZSDOSPos, 8), REG_RO }, | |
333 | ||
334 | { DRDATA (CC3D, ClockCPM3Delta, 32) }, | |
335 | { DRDATA (SC3DP, setClockCPM3Pos, 8), REG_RO }, | |
336 | { HRDATA (SC3DA, setClockCPM3Adr, 16), REG_RO }, | |
337 | { DRDATA (GC3DP, getClockCPM3Pos, 8), REG_RO }, | |
338 | { DRDATA (D3DO, daysCPM3SinceOrg, 32), REG_RO }, | |
339 | ||
340 | { DRDATA (TOFNI, timeOfNextInterrupt, 32), REG_RO }, | |
341 | { DRDATA (TIMI, timerInterrupt, 3) }, | |
342 | { HRDATA (TIMH, timerInterruptHandler, 16) }, | |
343 | { DRDATA (STIAP, setTimerInterruptAdrPos,8), REG_RO }, | |
344 | { DRDATA (TIMD, timerDelta, 32) }, | |
345 | { DRDATA (STDP, setTimerDeltaPos, 8), REG_RO }, | |
346 | { DRDATA (SLEEP, SIMHSleep, 32) }, | |
347 | { DRDATA (VOSLP, sleepAllowedStart, 32) }, | |
348 | ||
349 | { DRDATA (STPDT, stopWatchDelta, 32), REG_RO }, | |
350 | { DRDATA (STPOS, getStopWatchDeltaPos, 8), REG_RO }, | |
351 | { DRDATA (STPNW, stopWatchNow, 32), REG_RO }, | |
352 | { DRDATA (MTSP, markTimeSP, 8), REG_RO }, | |
353 | ||
354 | { DRDATA (VPOS, versionPos, 8), REG_RO }, | |
355 | { DRDATA (LCPMS, lastCPMStatus, 8), REG_RO }, | |
356 | { DRDATA (LCMD, lastCommand, 8), REG_RO }, | |
357 | { DRDATA (CPOS, getCommonPos, 8), REG_RO }, | |
358 | { NULL } | |
359 | }; | |
360 | ||
361 | static MTAB simh_mod[] = { | |
362 | /* quiet, no warning messages */ | |
363 | { UNIT_SIMH_VERBOSE, 0, "QUIET", "QUIET", NULL }, | |
364 | /* verbose, display warning messages */ | |
365 | { UNIT_SIMH_VERBOSE, UNIT_SIMH_VERBOSE, "VERBOSE", "VERBOSE", NULL }, | |
366 | /* timer generated interrupts are off */ | |
367 | { UNIT_SIMH_TIMERON, 0, "TIMEROFF", "TIMEROFF", &simh_dev_set_timeroff }, | |
368 | /* timer generated interrupts are on */ | |
369 | { UNIT_SIMH_TIMERON, UNIT_SIMH_TIMERON, "TIMERON", "TIMERON", &simh_dev_set_timeron }, | |
370 | { 0 } | |
371 | }; | |
372 | ||
373 | DEVICE simh_device = { | |
374 | "SIMH", &simh_unit, simh_reg, simh_mod, | |
375 | 1, 10, 31, 1, 16, 4, | |
376 | NULL, NULL, &simh_dev_reset, | |
377 | NULL, NULL, NULL, | |
378 | NULL, 0, 0, | |
379 | NULL, NULL, NULL | |
380 | }; | |
381 | ||
382 | char messageBuffer[256] = { 0 }; | |
383 | ||
384 | void printMessage(void) { | |
385 | printf(messageBuffer); | |
386 | printf(NLP); | |
387 | if (sim_log) { | |
388 | fprintf(sim_log, messageBuffer); | |
389 | fprintf(sim_log,"\n"); | |
390 | } | |
391 | } | |
392 | ||
393 | static void resetSIOWarningFlags(void) { | |
394 | warnUnattachedPTP = warnUnattachedPTR = warnPTREOF = warnUnassignedPort = 0; | |
395 | } | |
396 | ||
397 | static t_stat sio_set_verbose(UNIT *uptr, int32 value, char *cptr, void *desc) { | |
398 | resetSIOWarningFlags(); | |
399 | return SCPE_OK; | |
400 | } | |
401 | ||
402 | static t_stat sio_attach(UNIT *uptr, char *cptr) { | |
403 | t_stat r = SCPE_IERR; | |
404 | sio_unit.u3 = FALSE; /* no character in terminal input buffer */ | |
405 | get_uint(cptr, 10, 65535, &r); /* attempt to get port, discard result */ | |
406 | if (r == SCPE_OK) { /* string can be interpreted as port number */ | |
407 | sio_unit.u4 = FALSE; /* terminal input is not attached to a file */ | |
408 | return tmxr_attach(&altairTMXR, uptr, cptr); /* attach mux */ | |
409 | } | |
410 | sio_unit.u4 = TRUE; /* terminal input is attached to a file */ | |
411 | sio_unit.u5 = FALSE; /* EOF not yet reached */ | |
412 | return attach_unit(uptr, cptr); | |
413 | } | |
414 | ||
415 | static t_stat sio_detach(UNIT *uptr) { | |
416 | sio_unit.u3 = FALSE; /* no character in terminal input buffer */ | |
417 | if (sio_unit.u4) { /* is terminal input attached to a file? */ | |
418 | sio_unit.u4 = FALSE; /* not anymore, detach */ | |
419 | return detach_unit(uptr); | |
420 | } | |
421 | return tmxr_detach(&altairTMXR, uptr); | |
422 | } | |
423 | ||
424 | static void pollConnection(void) { | |
425 | if (sio_unit.flags & UNIT_ATT) { | |
426 | int32 temp = tmxr_poll_conn(&altairTMXR); /* poll connection */ | |
427 | if (temp >= 0) | |
428 | TerminalLines[temp].rcve = 1; /* enable receive */ | |
429 | tmxr_poll_rx(&altairTMXR); /* poll input */ | |
430 | tmxr_poll_tx(&altairTMXR); /* poll output */ | |
431 | } | |
432 | } | |
433 | ||
434 | /* reset routines */ | |
435 | static t_stat sio_reset(DEVICE *dptr) { | |
436 | int32 i; | |
437 | sio_unit.u3 = FALSE; /* no character in terminal input buffer */ | |
438 | resetSIOWarningFlags(); | |
439 | if (sio_unit.u4) { /* is terminal input attached to a file? */ | |
440 | rewind(sio_unit.fileref); /* yes, rewind input */ | |
441 | sio_unit.u5 = FALSE; /* EOF not yet reached */ | |
442 | } | |
443 | else if (sio_unit.flags & UNIT_ATT) | |
444 | for (i = 0; i < TERMINALS; i++) | |
445 | if (TerminalLines[i].conn) | |
446 | tmxr_reset_ln(&TerminalLines[i]); | |
447 | return SCPE_OK; | |
448 | } | |
449 | ||
450 | static t_stat ptr_reset(DEVICE *dptr) { | |
451 | resetSIOWarningFlags(); | |
452 | ptr_unit.u3 = FALSE; /* End Of File not yet reached */ | |
453 | if (ptr_unit.flags & UNIT_ATT) /* attached? */ | |
454 | rewind(ptr_unit.fileref); | |
455 | return SCPE_OK; | |
456 | } | |
457 | ||
458 | static t_stat ptp_reset(DEVICE *dptr) { | |
459 | resetSIOWarningFlags(); | |
460 | return SCPE_OK; | |
461 | } | |
462 | ||
463 | static int32 mapCharacter(int32 ch) { | |
464 | ch &= 0xff; | |
465 | if (sio_unit.flags & UNIT_SIO_MAP) { | |
466 | if (sio_unit.flags & UNIT_SIO_BS) { | |
467 | if (ch == BACKSPACE_CHAR) | |
468 | return DELETE_CHAR; | |
469 | } | |
470 | else if (ch == DELETE_CHAR) | |
471 | return BACKSPACE_CHAR; | |
472 | if (sio_unit.flags & UNIT_SIO_UPPER) | |
473 | return toupper(ch); | |
474 | } | |
475 | return ch; | |
476 | } | |
477 | ||
478 | /* I/O instruction handlers, called from the CPU module when an | |
479 | IN or OUT instruction is issued. | |
480 | ||
481 | Each function is passed an 'io' flag, where 0 means a read from | |
482 | the port, and 1 means a write to the port. On input, the actual | |
483 | input is passed as the return value, on output, 'data' is written | |
484 | to the device. | |
485 | ||
486 | Port 1 controls console I/O. We distinguish three cases: | |
487 | 1) SIO attached to a file (i.e. input taken from a file ) | |
488 | 2) SIO attached to a port (i.e. Telnet console I/O ) | |
489 | 3) SIO not attached to a port (i.e. "regular" console I/O ) | |
490 | */ | |
491 | ||
492 | typedef struct { | |
493 | int32 port; /* this information belongs to port number 'port' */ | |
494 | int32 terminalLine; /* map to this 'terminalLine' */ | |
495 | int32 sio_can_read; /* bit mask to indicate that one can read from this port */ | |
496 | int32 sio_cannot_read; /* bit mask to indicate that one cannot read from this port */ | |
497 | int32 sio_can_write; /* bit mask to indicate that one can write to this port */ | |
498 | int32 hasReset; /* TRUE iff SIO has reset command */ | |
499 | int32 sio_reset; /* reset command */ | |
500 | int32 hasOUT; /* TRUE iff port supports OUT command */ | |
501 | int32 isBuiltin; /* TRUE iff mapping is built in */ | |
502 | } SIO_PORT_INFO; | |
503 | ||
504 | static SIO_PORT_INFO port_table[PORT_TABLE_SIZE] = { | |
505 | {0x00, 0, KBD_HAS_CHAR, KBD_HAS_NO_CHAR, SIO_CAN_WRITE, FALSE, 0, FALSE, TRUE }, | |
506 | {0x01, 0, 0, 0, 0, FALSE, 0, FALSE, TRUE }, | |
507 | {0x02, 0, VGSIO_CAN_READ, 0, VGSIO_CAN_WRITE, FALSE, 0, TRUE, TRUE }, | |
508 | {0x03, 0, VGSIO_CAN_READ, 0, VGSIO_CAN_WRITE, FALSE, 0, FALSE, TRUE }, | |
509 | {0x10, 0, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, FALSE, TRUE }, | |
510 | {0x14, 1, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, FALSE, TRUE }, | |
511 | {0x16, 2, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, FALSE, TRUE }, | |
512 | {0x18, 3, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, FALSE, TRUE }, | |
513 | {0x11, 0, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, TRUE, TRUE }, | |
514 | {0x15, 1, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, TRUE, TRUE }, | |
515 | {0x17, 2, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, TRUE, TRUE }, | |
516 | {0x19, 3, SIO_CAN_READ, 0, SIO_CAN_WRITE, TRUE, SIO_RESET, TRUE, TRUE }, | |
517 | {-1, 0, 0, 0, 0, 0, 0, 0, 0} /* must be last */ | |
518 | }; | |
519 | ||
520 | static SIO_PORT_INFO lookupPortInfo(const int32 port, int32 *position) { | |
521 | int32 i = 0; | |
522 | while ((port_table[i].port != -1) && (port_table[i].port != port)) i++; | |
523 | *position = i; | |
524 | return port_table[i]; | |
525 | } | |
526 | ||
527 | /* keyboard idle detection: sleep when feature enabled, no character available | |
528 | (duty of caller) and operation not voided (e.g. when output is available) */ | |
529 | static void checkSleep(void) { | |
530 | if (sio_unit.flags & UNIT_SIO_SLEEP) { | |
531 | if (sleepAllowedCounter) sleepAllowedCounter--; | |
532 | else do_SIMH_sleep(); | |
533 | } | |
534 | } | |
535 | ||
536 | /* void sleep for next 'sleepAllowedStart' tests */ | |
537 | static void voidSleep(void) { | |
538 | sleepAllowedCounter = sleepAllowedStart; | |
539 | } | |
540 | ||
541 | /* generic status port for keyboard input / terminal output */ | |
542 | int32 sio0s(const int32 port, const int32 io, const int32 data) { | |
543 | int32 ch, result; | |
544 | SIO_PORT_INFO spi = lookupPortInfo(port, &ch); | |
545 | assert(spi.port == port); | |
546 | pollConnection(); | |
547 | if (io == 0) { /* IN */ | |
548 | if (sio_unit.u4) /* attached to a file? */ | |
549 | if (sio_unit.u5) /* EOF reached? */ | |
550 | sio_detach(&sio_unit); /* detach file and switch to keyboard input */ | |
551 | else return spi.sio_can_read | spi.sio_can_write; | |
552 | if (sio_unit.flags & UNIT_ATT) { /* attached to a port? */ | |
553 | if (tmxr_rqln(&TerminalLines[spi.terminalLine])) | |
554 | result = spi.sio_can_read; | |
555 | else { | |
556 | result = spi.sio_cannot_read; | |
557 | checkSleep(); | |
558 | } | |
559 | return result | /* read possible if character available */ | |
560 | (TerminalLines[spi.terminalLine].conn && TerminalLines[spi.terminalLine].xmte ? spi.sio_can_write : 0x00); | |
561 | /* write possible if connected and transmit | |
562 | enabled */ | |
563 | } | |
564 | if (sio_unit.u3) /* character available? */ | |
565 | return spi.sio_can_read | spi.sio_can_write; | |
566 | ch = sim_poll_kbd(); /* no, try to get a character */ | |
567 | if (ch) { /* character available? */ | |
568 | if (ch == SCPE_STOP) { /* stop CPU in case ^E (default) was typed */ | |
569 | stop_cpu = TRUE; | |
570 | sim_interval = 0; /* detect stop condition as soon as possible*/ | |
571 | return spi.sio_can_write | spi.sio_cannot_read; /* do not consume stop character */ | |
572 | } | |
573 | sio_unit.u3 = TRUE; /* indicate character available */ | |
574 | sio_unit.buf = ch; /* store character in buffer */ | |
575 | return spi.sio_can_read | spi.sio_can_write; | |
576 | } | |
577 | checkSleep(); | |
578 | return spi.sio_can_write | spi.sio_cannot_read; | |
579 | } /* OUT follows, no fall-through from IN */ | |
580 | if (spi.hasReset && (data == spi.sio_reset)) /* reset command */ | |
581 | sio_unit.u3 = FALSE; /* indicate that no character is available */ | |
582 | return 0x00; /* ignored since OUT */ | |
583 | } | |
584 | ||
585 | /* generic data port for keyboard input / terminal output */ | |
586 | int32 sio0d(const int32 port, const int32 io, const int32 data) { | |
587 | int32 ch; | |
588 | SIO_PORT_INFO spi = lookupPortInfo(port, &ch); | |
589 | assert(spi.port == port); | |
590 | pollConnection(); | |
591 | if (io == 0) { /* IN */ | |
592 | if (sio_unit.u4) { /* attached to a file? */ | |
593 | if (sio_unit.u5) { /* EOF reached? */ | |
594 | sio_detach(&sio_unit); /* detach file and switch to keyboard input */ | |
595 | return CONTROLC_CHAR; /* this time return ^C after all */ | |
596 | } | |
597 | if ((ch = getc(sio_unit.fileref)) == EOF) { /* end of file? */ | |
598 | sio_unit.u5 = TRUE; /* terminal input file has reached EOF */ | |
599 | return CONTROLC_CHAR; /* result is ^C (= CP/M interrupt) */ | |
600 | } | |
601 | return mapCharacter(ch); /* return mapped character */ | |
602 | } | |
603 | if (sio_unit.flags & UNIT_ATT) | |
604 | return mapCharacter(tmxr_getc_ln(&TerminalLines[spi.terminalLine])); | |
605 | sio_unit.u3 = FALSE; /* no character is available any more */ | |
606 | return mapCharacter(sio_unit.buf); /* return previous character */ | |
607 | } /* OUT follows, no fall-through from IN */ | |
608 | if (spi.hasOUT) { | |
609 | ch = sio_unit.flags & UNIT_SIO_ANSI ? data & 0x7f : data; /* clear highest bit in ANSI mode */ | |
610 | if ((ch != CONTROLG_CHAR) || !(sio_unit.flags & UNIT_SIO_BELL)) { | |
611 | voidSleep(); | |
612 | if ((sio_unit.flags & UNIT_ATT) && (!sio_unit.u4)) /* attached to a port and not to a file */ | |
613 | tmxr_putc_ln(&TerminalLines[spi.terminalLine], ch); /* status ignored */ | |
614 | else | |
615 | sim_putchar(ch); | |
616 | } | |
617 | } | |
618 | return 0x00; /* ignored since OUT */ | |
619 | } | |
620 | ||
621 | /* PTR/PTP status port */ | |
622 | int32 sio1s(const int32 port, const int32 io, const int32 data) { | |
623 | if (io == 0) { /* IN */ | |
624 | /* reset I bit iff PTR unit not attached or | |
625 | no more data available. O bit is always | |
626 | set since write always possible. */ | |
627 | if ((ptr_unit.flags & UNIT_ATT) == 0) { /* PTR is not attached */ | |
628 | if ((sio_unit.flags & UNIT_SIO_VERBOSE) && (warnUnattachedPTR < warnLevelSIO)) { | |
629 | warnUnattachedPTR++; | |
630 | /*06*/ MESSAGE_2("Attempt to test status of unattached PTR[0x%02x]. 0x02 returned.", port); | |
631 | } | |
632 | return SIO_CAN_WRITE; | |
633 | } | |
634 | /* if EOF then SIO_CAN_WRITE else | |
635 | (SIO_CAN_WRITE and SIO_CAN_READ) */ | |
636 | return ptr_unit.u3 ? SIO_CAN_WRITE : (SIO_CAN_READ | SIO_CAN_WRITE); | |
637 | } /* OUT follows */ | |
638 | if (data == SIO_RESET) | |
639 | ptr_unit.u3 = FALSE; /* reset EOF indicator */ | |
640 | return 0x00; /* ignored since OUT */ | |
641 | } | |
642 | ||
643 | /* PTR/PTP data port */ | |
644 | int32 sio1d(const int32 port, const int32 io, const int32 data) { | |
645 | int32 ch; | |
646 | if (io == 0) { /* IN */ | |
647 | if (ptr_unit.u3) { /* EOF reached, no more data available */ | |
648 | if ((sio_unit.flags & UNIT_SIO_VERBOSE) && (warnPTREOF < warnLevelSIO)) { | |
649 | warnPTREOF++; | |
650 | /*07*/ MESSAGE_2("PTR[0x%02x] attempted to read past EOF. 0x00 returned.", port); | |
651 | } | |
652 | return 0x00; | |
653 | } | |
654 | if ((ptr_unit.flags & UNIT_ATT) == 0) { /* not attached */ | |
655 | if ((sio_unit.flags & UNIT_SIO_VERBOSE) && (warnUnattachedPTR < warnLevelSIO)) { | |
656 | warnUnattachedPTR++; | |
657 | /*08*/ MESSAGE_2("Attempt to read from unattached PTR[0x%02x]. 0x00 returned.", port); | |
658 | } | |
659 | return 0x00; | |
660 | } | |
661 | if ((ch = getc(ptr_unit.fileref)) == EOF) { /* end of file? */ | |
662 | ptr_unit.u3 = TRUE; /* remember EOF reached */ | |
663 | return CONTROLZ_CHAR; /* ^Z denotes end of text file in CP/M */ | |
664 | } | |
665 | return ch & 0xff; | |
666 | } /* OUT follows */ | |
667 | if (ptp_unit.flags & UNIT_ATT) /* unit must be attached */ | |
668 | putc(data, ptp_unit.fileref); | |
669 | /* else ignore data */ | |
670 | else if ((sio_unit.flags & UNIT_SIO_VERBOSE) && (warnUnattachedPTP < warnLevelSIO)) { | |
671 | warnUnattachedPTP++; | |
672 | /*09*/ MESSAGE_3("Attempt to output '0x%02x' to unattached PTP[0x%02x] - ignored.", data, port); | |
673 | } | |
674 | return 0x00; /* ignored since OUT */ | |
675 | } | |
676 | ||
677 | static t_stat toBool(char tf, int *result) { | |
678 | if (tf == 'T') { | |
679 | *result = TRUE; | |
680 | return SCPE_OK; | |
681 | } | |
682 | if (tf == 'F') { | |
683 | *result = FALSE; | |
684 | return SCPE_OK; | |
685 | } | |
686 | return SCPE_ARG; | |
687 | } | |
688 | ||
689 | static void show_sio_port_info(FILE *st, SIO_PORT_INFO sip) { | |
690 | if (sio_unit.flags & UNIT_SIO_VERBOSE) | |
691 | fprintf(st, "(Port=%02x/Terminal=%1i/Read=0x%02x/NotRead=0x%02x/" | |
692 | "Write=0x%02x/Reset?=%s/Reset=0x%02x/Data?=%s)", | |
693 | sip.port, sip.terminalLine, sip.sio_can_read, sip.sio_cannot_read, | |
694 | sip.sio_can_write, sip.hasReset ? "True" : "False", sip.sio_reset, | |
695 | sip.hasOUT ? "True" : "False"); | |
696 | else | |
697 | fprintf(st, "(%02x/%1i/%02x/%02x/%02x/%s/%02x/%s)", | |
698 | sip.port, sip.terminalLine, sip.sio_can_read, sip.sio_cannot_read, | |
699 | sip.sio_can_write, sip.hasReset ? "T" : "F", sip.sio_reset, | |
700 | sip.hasOUT ? "T" : "F"); | |
701 | } | |
702 | ||
703 | static uint32 equalSIP(SIO_PORT_INFO x, SIO_PORT_INFO y) { | |
704 | /* isBuiltin is not relevant for equality, only for display */ | |
705 | return (x.port == y.port) && (x.terminalLine == y.terminalLine) && | |
706 | (x.sio_can_read == y.sio_can_read) && (x.sio_cannot_read == y.sio_cannot_read) && | |
707 | (x.sio_can_write == y.sio_can_write) && (x.hasReset == y.hasReset) && | |
708 | (x.sio_reset == y.sio_reset) && (x.hasOUT == y.hasOUT); | |
709 | } | |
710 | ||
711 | static t_stat sio_dev_set_port(UNIT *uptr, int32 value, char *cptr, void *desc) { | |
712 | int32 result, n, position; | |
713 | SIO_PORT_INFO sip = { 0 }, old; | |
714 | char hasReset, hasOUT; | |
715 | if (cptr == NULL) return SCPE_ARG; | |
716 | result = sscanf(cptr, "%x%n", &sip.port, &n); | |
717 | if ((result == 1) && (cptr[n] == 0)) { | |
718 | old = lookupPortInfo(sip.port, &position); | |
719 | if (old.port == -1) { | |
720 | printf("No mapping for port 0x%02x exists - cannot remove.\n", sip.port); | |
721 | return SCPE_ARG; | |
722 | } | |
723 | do { | |
724 | port_table[position] = port_table[position + 1]; | |
725 | position++; | |
726 | } | |
727 | while (port_table[position].port != -1); | |
728 | sim_map_resource(sip.port, 1, RESOURCE_TYPE_IO, &nulldev, FALSE); | |
729 | if (sio_unit.flags & UNIT_SIO_VERBOSE) { | |
730 | printf("Removing mapping for port 0x%02x.\n\t", sip.port); | |
731 | show_sio_port_info(stdout, old); | |
732 | } | |
733 | return SCPE_OK; | |
734 | } | |
735 | result = sscanf(cptr, "%x/%d/%x/%x/%x/%1c/%x/%1c%n", &sip.port, | |
736 | &sip.terminalLine, &sip.sio_can_read, &sip.sio_cannot_read, | |
737 | &sip.sio_can_write, &hasReset, &sip.sio_reset, &hasOUT, &n); | |
738 | if ((result != 8) || (result == EOF) || (cptr[n] != 0)) return SCPE_ARG; | |
739 | result = toBool(hasReset, &sip.hasReset); | |
740 | if (result != SCPE_OK) return result; | |
741 | result = toBool(hasOUT, &sip.hasOUT); | |
742 | if (result != SCPE_OK) return result; | |
743 | if (sip.port != (sip.port & 0xff)) { | |
744 | printf("Truncating port 0x%x to 0x%02x.\n", sip.port, sip.port & 0xff); | |
745 | sip.port &= 0xff; | |
746 | } | |
747 | old = lookupPortInfo(sip.port, &position); | |
748 | if (old.port == sip.port) { | |
749 | if (sio_unit.flags & UNIT_SIO_VERBOSE) { | |
750 | printf("Replacing mapping for port 0x%02x.\n\t", sip.port); | |
751 | show_sio_port_info(stdout, old); | |
752 | printf("-> "); | |
753 | show_sio_port_info(stdout, sip); | |
754 | if (equalSIP(sip, old)) printf("[identical]"); | |
755 | } | |
756 | } | |
757 | else { | |
758 | port_table[position + 1] = old; | |
759 | if (sio_unit.flags & UNIT_SIO_VERBOSE) { | |
760 | printf("Adding mapping for port 0x%02x.\n\t", sip.port); | |
761 | show_sio_port_info(stdout, sip); | |
762 | } | |
763 | } | |
764 | if (sio_unit.flags & UNIT_SIO_VERBOSE) printf("\n"); | |
765 | port_table[position] = sip; | |
766 | sim_map_resource(sip.port, 1, RESOURCE_TYPE_IO, (sip.hasOUT || | |
767 | (sip.sio_can_read == 0) && (sip.sio_cannot_read == 0) && | |
768 | (sip.sio_can_write == 0)) ? &sio0d : &sio0s, FALSE); | |
769 | return SCPE_OK; | |
770 | } | |
771 | ||
772 | static t_stat sio_dev_show_port(FILE *st, UNIT *uptr, int32 val, void *desc) { | |
773 | int32 i, first = TRUE; | |
774 | for (i = 0; port_table[i].port != -1; i++) | |
775 | if (!port_table[i].isBuiltin) { | |
776 | if (first) first = FALSE; | |
777 | else fprintf(st, " "); | |
778 | show_sio_port_info(st, port_table[i]); | |
779 | } | |
780 | if (first) fprintf(st, "no extra port"); | |
781 | return SCPE_OK; | |
782 | } | |
783 | ||
784 | static t_stat sio_dev_set_interrupton(UNIT *uptr, int32 value, char *cptr, void *desc) { | |
785 | keyboardInterrupt = FALSE; | |
786 | return sim_activate(&sio_unit, sio_unit.wait); /* activate unit */ | |
787 | } | |
788 | ||
789 | static t_stat sio_dev_set_interruptoff(UNIT *uptr, int32 value, char *cptr, void *desc) { | |
790 | keyboardInterrupt = FALSE; | |
791 | sim_cancel(&sio_unit); | |
792 | return SCPE_OK; | |
793 | } | |
794 | ||
795 | static t_stat sio_svc(UNIT *uptr) { | |
796 | if (sio0s(0, 0, 0) & KBD_HAS_CHAR) { | |
797 | keyboardInterrupt = TRUE; | |
798 | } | |
799 | if (sio_unit.flags & UNIT_SIO_INTERRUPT) | |
800 | sim_activate(&sio_unit, sio_unit.wait); /* activate unit */ | |
801 | return SCPE_OK; | |
802 | } | |
803 | ||
804 | int32 nulldev(const int32 port, const int32 io, const int32 data) { | |
805 | if ((sio_unit.flags & UNIT_SIO_VERBOSE) && (warnUnassignedPort < warnLevelSIO)) { | |
806 | warnUnassignedPort++; | |
807 | if (io == 0) { | |
808 | MESSAGE_2("Attempt to input from unassigned port 0x%04x - ignored.", port); | |
809 | } | |
810 | else { | |
811 | MESSAGE_3("Attempt to output 0x%02x to unassigned port 0x%04x - ignored.", data, port); | |
812 | } | |
813 | } | |
814 | return io == 0 ? 0xff : 0; | |
815 | } | |
816 | ||
817 | int32 sr_dev(const int32 port, const int32 io, const int32 data) { | |
818 | return io == 0 ? SR : 0; | |
819 | } | |
820 | ||
821 | static int32 toBCD(const int32 x) { | |
822 | return (x / 10) * 16 + (x % 10); | |
823 | } | |
824 | ||
825 | static int32 fromBCD(const int32 x) { | |
826 | return 10 * ((0xf0 & x) >> 4) + (0x0f & x); | |
827 | } | |
828 | ||
829 | /* Z80 or 8080 programs communicate with the SIMH pseudo device via port 0xfe. | |
830 | The following principles apply: | |
831 | ||
832 | 1) For commands that do not require parameters and do not return results | |
833 | ld a,<cmd> | |
834 | out (0feh),a | |
835 | Special case is the reset command which needs to be send 128 times to make | |
836 | sure that the internal state is properly reset. | |
837 | ||
838 | 2) For commands that require parameters and do not return results | |
839 | ld a,<cmd> | |
840 | out (0feh),a | |
841 | ld a,<p1> | |
842 | out (0feh),a | |
843 | ld a,<p2> | |
844 | out (0feh),a | |
845 | ... | |
846 | Note: The calling program must send all parameter bytes. Otherwise | |
847 | the pseudo device is left in an undefined state. | |
848 | ||
849 | 3) For commands that do not require parameters and return results | |
850 | ld a,<cmd> | |
851 | out (0feh),a | |
852 | in a,(0feh) ; <A> contains first byte of result | |
853 | in a,(0feh) ; <A> contains second byte of result | |
854 | ... | |
855 | Note: The calling program must request all bytes of the result. Otherwise | |
856 | the pseudo device is left in an undefined state. | |
857 | ||
858 | 4) Commands requiring parameters and returning results do not exist currently. | |
859 | ||
860 | */ | |
861 | ||
862 | enum simhPseudoDeviceCommands { /* do not change order or remove commands, add only at the end */ | |
863 | printTimeCmd, /* 0 print the current time in milliseconds */ | |
864 | startTimerCmd, /* 1 start a new timer on the top of the timer stack */ | |
865 | stopTimerCmd, /* 2 stop timer on top of timer stack and show time difference */ | |
866 | resetPTRCmd, /* 3 reset the PTR device */ | |
867 | attachPTRCmd, /* 4 attach the PTR device */ | |
868 | detachPTRCmd, /* 5 detach the PTR device */ | |
869 | getSIMHVersionCmd, /* 6 get the current version of the SIMH pseudo device */ | |
870 | getClockZSDOSCmd, /* 7 get the current time in ZSDOS format */ | |
871 | setClockZSDOSCmd, /* 8 set the current time in ZSDOS format */ | |
872 | getClockCPM3Cmd, /* 9 get the current time in CP/M 3 format */ | |
873 | setClockCPM3Cmd, /* 10 set the current time in CP/M 3 format */ | |
874 | getBankSelectCmd, /* 11 get the selected bank */ | |
875 | setBankSelectCmd, /* 12 set the selected bank */ | |
876 | getCommonCmd, /* 13 get the base address of the common memory segment */ | |
877 | resetSIMHInterfaceCmd, /* 14 reset the SIMH pseudo device */ | |
878 | showTimerCmd, /* 15 show time difference to timer on top of stack */ | |
879 | attachPTPCmd, /* 16 attach PTP to the file with name at beginning of CP/M command line*/ | |
880 | detachPTPCmd, /* 17 detach PTP */ | |
881 | hasBankedMemoryCmd, /* 18 determines whether machine has banked memory */ | |
882 | setZ80CPUCmd, /* 19 set the CPU to a Z80 */ | |
883 | set8080CPUCmd, /* 20 set the CPU to an 8080 */ | |
884 | startTimerInterruptsCmd, /* 21 start timer interrupts */ | |
885 | stopTimerInterruptsCmd, /* 22 stop timer interrupts */ | |
886 | setTimerDeltaCmd, /* 23 set the timer interval in which interrupts occur */ | |
887 | setTimerInterruptAdrCmd, /* 24 set the address to call by timer interrupts */ | |
888 | resetStopWatchCmd, /* 25 reset the millisecond stop watch */ | |
889 | readStopWatchCmd, /* 26 read the millisecond stop watch */ | |
890 | SIMHSleepCmd, /* 27 let SIMH sleep for SIMHSleep microseconds */ | |
891 | getHostOSPathSeparator, /* 28 obtain the file path separator of the OS under which SIMH runs */ | |
892 | getHostFilenames /* 29 perform wildcard expansion and obtain list of file names */ | |
893 | }; | |
894 | ||
895 | #define CPM_COMMAND_LINE_LENGTH 128 | |
896 | #define TIMER_STACK_LIMIT 10 /* stack depth of timer stack */ | |
897 | static uint32 markTime[TIMER_STACK_LIMIT]; /* timer stack */ | |
898 | static struct tm currentTime; | |
899 | static int32 currentTimeValid = FALSE; | |
900 | static char version[] = "SIMH003"; | |
901 | ||
902 | static t_stat simh_dev_reset(DEVICE *dptr) { | |
903 | currentTimeValid = FALSE; | |
904 | ClockZSDOSDelta = 0; | |
905 | setClockZSDOSPos = 0; | |
906 | getClockZSDOSPos = 0; | |
907 | ClockCPM3Delta = 0; | |
908 | setClockCPM3Pos = 0; | |
909 | getClockCPM3Pos = 0; | |
910 | getStopWatchDeltaPos = 0; | |
911 | getCommonPos = 0; | |
912 | setTimerDeltaPos = 0; | |
913 | setTimerInterruptAdrPos = 0; | |
914 | markTimeSP = 0; | |
915 | versionPos = 0; | |
916 | lastCommand = 0; | |
917 | lastCPMStatus = SCPE_OK; | |
918 | timerInterrupt = FALSE; | |
919 | if (simh_unit.flags & UNIT_SIMH_TIMERON) | |
920 | simh_dev_set_timeron(NULL, 0, NULL, NULL); | |
921 | return SCPE_OK; | |
922 | } | |
923 | ||
924 | static void warnNoRealTimeClock(void) { | |
925 | if (simh_unit.flags & UNIT_SIMH_VERBOSE) { | |
926 | MESSAGE_1("Sorry - no real time clock available."); | |
927 | } | |
928 | } | |
929 | ||
930 | static t_stat simh_dev_set_timeron(UNIT *uptr, int32 value, char *cptr, void *desc) { | |
931 | if (rtc_avail) { | |
932 | timeOfNextInterrupt = sim_os_msec() + timerDelta; | |
933 | return sim_activate(&simh_unit, simh_unit.wait); /* activate unit */ | |
934 | } | |
935 | warnNoRealTimeClock(); | |
936 | return SCPE_ARG; | |
937 | } | |
938 | ||
939 | static t_stat simh_dev_set_timeroff(UNIT *uptr, int32 value, char *cptr, void *desc) { | |
940 | timerInterrupt = FALSE; | |
941 | sim_cancel(&simh_unit); | |
942 | return SCPE_OK; | |
943 | } | |
944 | ||
945 | static t_stat simh_svc(UNIT *uptr) { | |
946 | uint32 n = sim_os_msec(); | |
947 | if (n >= timeOfNextInterrupt) { | |
948 | timerInterrupt = TRUE; | |
949 | timeOfNextInterrupt += timerDelta; | |
950 | if (n >= timeOfNextInterrupt) /* time of next interrupt is not in the future */ | |
951 | timeOfNextInterrupt = n + timerDelta; /* make sure it is in the future! */ | |
952 | } | |
953 | if (simh_unit.flags & UNIT_SIMH_TIMERON) | |
954 | sim_activate(&simh_unit, simh_unit.wait); /* activate unit */ | |
955 | return SCPE_OK; | |
956 | } | |
957 | ||
958 | static char cpmCommandLine[CPM_COMMAND_LINE_LENGTH]; | |
959 | static void createCPMCommandLine(void) { | |
960 | int32 i, len = (GetBYTEWrapper(0x80) & 0x7f); /* 0x80 contains length of command line, discard first char */ | |
961 | for (i = 0; i < len - 1; i++) | |
962 | cpmCommandLine[i] = (char)GetBYTEWrapper(0x82 + i); /* the first char, typically ' ', is discarded */ | |
963 | cpmCommandLine[i] = 0; /* make C string */ | |
964 | } | |
965 | ||
966 | /* The CP/M command line is used as the name of a file and UNIT* uptr is attached to it. */ | |
967 | static void attachCPM(UNIT *uptr) { | |
968 | createCPMCommandLine(); | |
969 | if (uptr == &ptr_unit) | |
970 | sim_switches = SWMASK('R'); | |
971 | else if (uptr == &ptp_unit) | |
972 | sim_switches = SWMASK('W') | SWMASK('C'); /* 'C' option makes sure that file is properly truncated | |
973 | if it had existed before */ | |
974 | lastCPMStatus = attach_unit(uptr, cpmCommandLine); | |
975 | if ((lastCPMStatus != SCPE_OK) && (simh_unit.flags & UNIT_SIMH_VERBOSE)) { | |
976 | MESSAGE_3("Cannot open '%s' (%s).", cpmCommandLine, scp_error_messages[lastCPMStatus - SCPE_BASE]); | |
977 | /* must keep curly braces as MESSAGE_N is a macro with two statements */ | |
978 | } | |
979 | } | |
980 | ||
981 | /* setClockZSDOSAdr points to 6 byte block in M: YY MM DD HH MM SS in BCD notation */ | |
982 | static void setClockZSDOS(void) { | |
983 | struct tm newTime; | |
984 | int32 year = fromBCD(GetBYTEWrapper(setClockZSDOSAdr)); | |
985 | newTime.tm_year = year < 50 ? year + 100 : year; | |
986 | newTime.tm_mon = fromBCD(GetBYTEWrapper(setClockZSDOSAdr + 1)) - 1; | |
987 | newTime.tm_mday = fromBCD(GetBYTEWrapper(setClockZSDOSAdr + 2)); | |
988 | newTime.tm_hour = fromBCD(GetBYTEWrapper(setClockZSDOSAdr + 3)); | |
989 | newTime.tm_min = fromBCD(GetBYTEWrapper(setClockZSDOSAdr + 4)); | |
990 | newTime.tm_sec = fromBCD(GetBYTEWrapper(setClockZSDOSAdr + 5)); | |
991 | ClockZSDOSDelta = mktime(&newTime) - time(NULL); | |
992 | } | |
993 | ||
994 | #define SECONDS_PER_MINUTE 60 | |
995 | #define SECONDS_PER_HOUR (60 * SECONDS_PER_MINUTE) | |
996 | #define SECONDS_PER_DAY (24 * SECONDS_PER_HOUR) | |
997 | static time_t mkCPM3Origin(void) { | |
998 | struct tm date; | |
999 | date.tm_year = 77; | |
1000 | date.tm_mon = 11; | |
1001 | date.tm_mday = 31; | |
1002 | date.tm_hour = 0; | |
1003 | date.tm_min = 0; | |
1004 | date.tm_sec = 0; | |
1005 | return mktime(&date); | |
1006 | } | |
1007 | ||
1008 | /* setClockCPM3Adr points to 5 byte block in M: | |
1009 | 0 - 1 int16: days since 31 Dec 77 | |
1010 | 2 BCD byte: HH | |
1011 | 3 BCD byte: MM | |
1012 | 4 BCD byte: SS */ | |
1013 | static void setClockCPM3(void) { | |
1014 | ClockCPM3Delta = mkCPM3Origin() + | |
1015 | (GetBYTEWrapper(setClockCPM3Adr) + GetBYTEWrapper(setClockCPM3Adr + 1) * 256) * SECONDS_PER_DAY + | |
1016 | fromBCD(GetBYTEWrapper(setClockCPM3Adr + 2)) * SECONDS_PER_HOUR + | |
1017 | fromBCD(GetBYTEWrapper(setClockCPM3Adr + 3)) * SECONDS_PER_MINUTE + | |
1018 | fromBCD(GetBYTEWrapper(setClockCPM3Adr + 4)) - time(NULL); | |
1019 | } | |
1020 | ||
1021 | static int32 simh_in(const int32 port) { | |
1022 | int32 result = 0; | |
1023 | switch(lastCommand) { | |
1024 | ||
1025 | case getHostFilenames: | |
1026 | #if UNIX_PLATFORM | |
1027 | if (globValid) | |
1028 | if (globPosNameList < globS.gl_pathc) { | |
1029 | if (!(result = globS.gl_pathv[globPosNameList][globPosName++])) { | |
1030 | globPosNameList++; | |
1031 | globPosName = 0; | |
1032 | } | |
1033 | } | |
1034 | else { | |
1035 | globValid = FALSE; | |
1036 | lastCommand = 0; | |
1037 | globfree(&globS); | |
1038 | } | |
1039 | #elif defined (_WIN32) | |
1040 | if (globValid) | |
1041 | if (globFinished) | |
1042 | globValid = FALSE; | |
1043 | else if (!(result = FindFileData.cFileName[globPosName++])) { | |
1044 | globPosName = 0; | |
1045 | if (!FindNextFile(hFind, &FindFileData)) { | |
1046 | globFinished = TRUE; | |
1047 | FindClose(hFind); | |
1048 | hFind = INVALID_HANDLE_VALUE; | |
1049 | } | |
1050 | } | |
1051 | #else | |
1052 | lastCommand = 0; | |
1053 | #endif | |
1054 | break; | |
1055 | ||
1056 | case attachPTRCmd: | |
1057 | ||
1058 | case attachPTPCmd: | |
1059 | result = lastCPMStatus; | |
1060 | lastCommand = 0; | |
1061 | break; | |
1062 | ||
1063 | case getClockZSDOSCmd: | |
1064 | if (currentTimeValid) | |
1065 | switch(getClockZSDOSPos) { | |
1066 | ||
1067 | case 0: | |
1068 | result = toBCD(currentTime.tm_year > 99 ? | |
1069 | currentTime.tm_year - 100 : currentTime.tm_year); | |
1070 | getClockZSDOSPos = 1; | |
1071 | break; | |
1072 | ||
1073 | case 1: | |
1074 | result = toBCD(currentTime.tm_mon + 1); | |
1075 | getClockZSDOSPos = 2; | |
1076 | break; | |
1077 | ||
1078 | case 2: | |
1079 | result = toBCD(currentTime.tm_mday); | |
1080 | getClockZSDOSPos = 3; | |
1081 | break; | |
1082 | ||
1083 | case 3: | |
1084 | result = toBCD(currentTime.tm_hour); | |
1085 | getClockZSDOSPos = 4; | |
1086 | break; | |
1087 | ||
1088 | case 4: | |
1089 | result = toBCD(currentTime.tm_min); | |
1090 | getClockZSDOSPos = 5; | |
1091 | break; | |
1092 | ||
1093 | case 5: | |
1094 | result = toBCD(currentTime.tm_sec); | |
1095 | getClockZSDOSPos = lastCommand = 0; | |
1096 | break; | |
1097 | } | |
1098 | else | |
1099 | result = getClockZSDOSPos = lastCommand = 0; | |
1100 | break; | |
1101 | ||
1102 | case getClockCPM3Cmd: | |
1103 | if (currentTimeValid) | |
1104 | switch(getClockCPM3Pos) { | |
1105 | case 0: | |
1106 | result = daysCPM3SinceOrg & 0xff; | |
1107 | getClockCPM3Pos = 1; | |
1108 | break; | |
1109 | ||
1110 | case 1: | |
1111 | result = (daysCPM3SinceOrg >> 8) & 0xff; | |
1112 | getClockCPM3Pos = 2; | |
1113 | break; | |
1114 | ||
1115 | case 2: | |
1116 | result = toBCD(currentTime.tm_hour); | |
1117 | getClockCPM3Pos = 3; | |
1118 | break; | |
1119 | ||
1120 | case 3: | |
1121 | result = toBCD(currentTime.tm_min); | |
1122 | getClockCPM3Pos = 4; | |
1123 | break; | |
1124 | ||
1125 | case 4: | |
1126 | result = toBCD(currentTime.tm_sec); | |
1127 | getClockCPM3Pos = lastCommand = 0; | |
1128 | break; | |
1129 | } | |
1130 | else | |
1131 | result = getClockCPM3Pos = lastCommand = 0; | |
1132 | break; | |
1133 | ||
1134 | case getSIMHVersionCmd: | |
1135 | result = version[versionPos++]; | |
1136 | if (result == 0) | |
1137 | versionPos = lastCommand = 0; | |
1138 | break; | |
1139 | ||
1140 | case getBankSelectCmd: | |
1141 | if (cpu_unit.flags & UNIT_CPU_BANKED) | |
1142 | result = getBankSelect(); | |
1143 | else { | |
1144 | result = 0; | |
1145 | if (simh_unit.flags & UNIT_SIMH_VERBOSE) { | |
1146 | MESSAGE_1("Get selected bank ignored for non-banked memory."); | |
1147 | } | |
1148 | } | |
1149 | lastCommand = 0; | |
1150 | break; | |
1151 | ||
1152 | case getCommonCmd: | |
1153 | if (getCommonPos == 0) { | |
1154 | result = getCommon() & 0xff; | |
1155 | getCommonPos = 1; | |
1156 | } | |
1157 | else { | |
1158 | result = (getCommon() >> 8) & 0xff; | |
1159 | getCommonPos = lastCommand = 0; | |
1160 | } | |
1161 | break; | |
1162 | ||
1163 | case hasBankedMemoryCmd: | |
1164 | result = cpu_unit.flags & UNIT_CPU_BANKED ? MAXBANKS : 0; | |
1165 | lastCommand = 0; | |
1166 | break; | |
1167 | ||
1168 | case readStopWatchCmd: | |
1169 | if (getStopWatchDeltaPos == 0) { | |
1170 | result = stopWatchDelta & 0xff; | |
1171 | getStopWatchDeltaPos = 1; | |
1172 | } | |
1173 | else { | |
1174 | result = (stopWatchDelta >> 8) & 0xff; | |
1175 | getStopWatchDeltaPos = lastCommand = 0; | |
1176 | } | |
1177 | break; | |
1178 | ||
1179 | case getHostOSPathSeparator: | |
1180 | #if defined (__MWERKS__) && defined (macintosh) | |
1181 | result = ':'; /* colon on Macintosh OS 9 */ | |
1182 | #elif defined (_WIN32) | |
1183 | result = '\\'; /* back slash in Windows */ | |
1184 | #else | |
1185 | result = '/'; /* slash in UNIX */ | |
1186 | #endif | |
1187 | break; | |
1188 | ||
1189 | default: | |
1190 | if (simh_unit.flags & UNIT_SIMH_VERBOSE) { | |
1191 | MESSAGE_2("Undefined IN from SIMH pseudo device on port %03xh ignored.", | |
1192 | port); | |
1193 | } | |
1194 | result = lastCommand = 0; | |
1195 | } | |
1196 | return result; | |
1197 | } | |
1198 | ||
1199 | void do_SIMH_sleep(void) { | |
1200 | #if defined (_WIN32) | |
1201 | if ((SIMHSleep / 1000) && !sio_unit.u4) /* time to sleep and SIO not attached to a file */ | |
1202 | Sleep(SIMHSleep / 1000); | |
1203 | #else | |
1204 | if (SIMHSleep && !sio_unit.u4) /* time to sleep and SIO not attached to a file */ | |
1205 | usleep(SIMHSleep); | |
1206 | #endif | |
1207 | } | |
1208 | ||
1209 | static int32 simh_out(const int32 port, const int32 data) { | |
1210 | time_t now; | |
1211 | switch(lastCommand) { | |
1212 | ||
1213 | case setClockZSDOSCmd: | |
1214 | if (setClockZSDOSPos == 0) { | |
1215 | setClockZSDOSAdr = data; | |
1216 | setClockZSDOSPos = 1; | |
1217 | } | |
1218 | else { | |
1219 | setClockZSDOSAdr |= (data << 8); | |
1220 | setClockZSDOS(); | |
1221 | setClockZSDOSPos = lastCommand = 0; | |
1222 | } | |
1223 | break; | |
1224 | ||
1225 | case setClockCPM3Cmd: | |
1226 | if (setClockCPM3Pos == 0) { | |
1227 | setClockCPM3Adr = data; | |
1228 | setClockCPM3Pos = 1; | |
1229 | } | |
1230 | else { | |
1231 | setClockCPM3Adr |= (data << 8); | |
1232 | setClockCPM3(); | |
1233 | setClockCPM3Pos = lastCommand = 0; | |
1234 | } | |
1235 | break; | |
1236 | ||
1237 | case setBankSelectCmd: | |
1238 | if (cpu_unit.flags & UNIT_CPU_BANKED) | |
1239 | setBankSelect(data & BANKMASK); | |
1240 | else if (simh_unit.flags & UNIT_SIMH_VERBOSE) { | |
1241 | MESSAGE_2("Set selected bank to %i ignored for non-banked memory.", data & 3); | |
1242 | } | |
1243 | lastCommand = 0; | |
1244 | break; | |
1245 | ||
1246 | case setTimerDeltaCmd: | |
1247 | if (setTimerDeltaPos == 0) { | |
1248 | timerDelta = data; | |
1249 | setTimerDeltaPos = 1; | |
1250 | } | |
1251 | else { | |
1252 | timerDelta |= (data << 8); | |
1253 | setTimerDeltaPos = lastCommand = 0; | |
1254 | } | |
1255 | break; | |
1256 | ||
1257 | case setTimerInterruptAdrCmd: | |
1258 | if (setTimerInterruptAdrPos == 0) { | |
1259 | timerInterruptHandler = data; | |
1260 | setTimerInterruptAdrPos = 1; | |
1261 | } | |
1262 | else { | |
1263 | timerInterruptHandler |= (data << 8); | |
1264 | setTimerInterruptAdrPos = lastCommand = 0; | |
1265 | } | |
1266 | break; | |
1267 | ||
1268 | default: | |
1269 | lastCommand = data; | |
1270 | switch(data) { | |
1271 | ||
1272 | case getHostFilenames: | |
1273 | #if UNIX_PLATFORM | |
1274 | if (!globValid) { | |
1275 | globValid = TRUE; | |
1276 | globPosNameList = globPosName = 0; | |
1277 | createCPMCommandLine(); | |
1278 | globError = glob(cpmCommandLine, GLOB_ERR, NULL, &globS); | |
1279 | if (globError) { | |
1280 | if (simh_unit.flags & UNIT_SIMH_VERBOSE) { | |
1281 | MESSAGE_3("Cannot expand '%s'. Error is %i.", cpmCommandLine, globError); | |
1282 | } | |
1283 | globfree(&globS); | |
1284 | globValid = FALSE; | |
1285 | } | |
1286 | } | |
1287 | #elif defined (_WIN32) | |
1288 | if (!globValid) { | |
1289 | globValid = TRUE; | |
1290 | globPosName = 0; | |
1291 | globFinished = FALSE; | |
1292 | createCPMCommandLine(); | |
1293 | hFind = FindFirstFile(cpmCommandLine, &FindFileData); | |
1294 | if (hFind == INVALID_HANDLE_VALUE) { | |
1295 | if (simh_unit.flags & UNIT_SIMH_VERBOSE) { | |
1296 | MESSAGE_3("Cannot expand '%s'. Error is %lu.", cpmCommandLine, GetLastError()); | |
1297 | } | |
1298 | globValid = FALSE; | |
1299 | } | |
1300 | } | |
1301 | #endif | |
1302 | break; | |
1303 | ||
1304 | case SIMHSleepCmd: | |
1305 | do_SIMH_sleep(); | |
1306 | break; | |
1307 | ||
1308 | case printTimeCmd: /* print time */ | |
1309 | if (rtc_avail) { | |
1310 | MESSAGE_2("Current time in milliseconds = %d.", sim_os_msec()); | |
1311 | } | |
1312 | else { | |
1313 | warnNoRealTimeClock(); | |
1314 | } | |
1315 | break; | |
1316 | ||
1317 | case startTimerCmd: /* create a new timer on top of stack */ | |
1318 | if (rtc_avail) | |
1319 | if (markTimeSP < TIMER_STACK_LIMIT) | |
1320 | markTime[markTimeSP++] = sim_os_msec(); | |
1321 | else { | |
1322 | MESSAGE_1("Timer stack overflow."); | |
1323 | } | |
1324 | else warnNoRealTimeClock(); | |
1325 | break; | |
1326 | ||
1327 | case stopTimerCmd: /* stop timer on top of stack and show time difference */ | |
1328 | if (rtc_avail) | |
1329 | if (markTimeSP > 0) { | |
1330 | uint32 delta = sim_os_msec() - markTime[--markTimeSP]; | |
1331 | MESSAGE_2("Timer stopped. Elapsed time in milliseconds = %d.", delta); | |
1332 | } | |
1333 | else { | |
1334 | MESSAGE_1("No timer active."); | |
1335 | } | |
1336 | else warnNoRealTimeClock(); | |
1337 | break; | |
1338 | ||
1339 | case resetPTRCmd: /* reset ptr device */ | |
1340 | ptr_reset(NULL); | |
1341 | break; | |
1342 | ||
1343 | case attachPTRCmd: /* attach ptr to the file with name at beginning of CP/M command line */ | |
1344 | attachCPM(&ptr_unit); | |
1345 | break; | |
1346 | ||
1347 | case detachPTRCmd: /* detach ptr */ | |
1348 | detach_unit(&ptr_unit); | |
1349 | break; | |
1350 | ||
1351 | case getSIMHVersionCmd: | |
1352 | versionPos = 0; | |
1353 | break; | |
1354 | ||
1355 | case getClockZSDOSCmd: | |
1356 | time(&now); | |
1357 | now += ClockZSDOSDelta; | |
1358 | currentTime = *localtime(&now); | |
1359 | currentTimeValid = TRUE; | |
1360 | getClockZSDOSPos = 0; | |
1361 | break; | |
1362 | ||
1363 | case setClockZSDOSCmd: | |
1364 | setClockZSDOSPos = 0; | |
1365 | break; | |
1366 | ||
1367 | case getClockCPM3Cmd: | |
1368 | time(&now); | |
1369 | now += ClockCPM3Delta; | |
1370 | currentTime = *localtime(&now); | |
1371 | currentTimeValid = TRUE; | |
1372 | daysCPM3SinceOrg = (int32) ((now - mkCPM3Origin()) / SECONDS_PER_DAY); | |
1373 | getClockCPM3Pos = 0; | |
1374 | break; | |
1375 | ||
1376 | case setClockCPM3Cmd: | |
1377 | setClockCPM3Pos = 0; | |
1378 | break; | |
1379 | ||
1380 | case getBankSelectCmd: | |
1381 | case setBankSelectCmd: | |
1382 | case getCommonCmd: | |
1383 | case hasBankedMemoryCmd: | |
1384 | case getHostOSPathSeparator: | |
1385 | break; | |
1386 | ||
1387 | case resetSIMHInterfaceCmd: | |
1388 | markTimeSP = 0; | |
1389 | lastCommand = 0; | |
1390 | #if UNIX_PLATFORM | |
1391 | if (globValid) { | |
1392 | globValid = FALSE; | |
1393 | globfree(&globS); | |
1394 | } | |
1395 | #elif defined (_WIN32) | |
1396 | if (globValid) { | |
1397 | globValid = FALSE; | |
1398 | if (hFind != INVALID_HANDLE_VALUE) { | |
1399 | FindClose(hFind); | |
1400 | } | |
1401 | } | |
1402 | #endif | |
1403 | break; | |
1404 | ||
1405 | case showTimerCmd: /* show time difference to timer on top of stack */ | |
1406 | if (rtc_avail) | |
1407 | if (markTimeSP > 0) { | |
1408 | uint32 delta = sim_os_msec() - markTime[markTimeSP - 1]; | |
1409 | MESSAGE_2("Timer running. Elapsed in milliseconds = %d.", delta); | |
1410 | } | |
1411 | else { | |
1412 | MESSAGE_1("No timer active."); | |
1413 | } | |
1414 | else warnNoRealTimeClock(); | |
1415 | break; | |
1416 | ||
1417 | case attachPTPCmd: /* attach ptp to the file with name at beginning of CP/M command line */ | |
1418 | attachCPM(&ptp_unit); | |
1419 | break; | |
1420 | ||
1421 | case detachPTPCmd: /* detach ptp */ | |
1422 | detach_unit(&ptp_unit); | |
1423 | break; | |
1424 | ||
1425 | case setZ80CPUCmd: | |
1426 | chiptype = CHIP_TYPE_Z80; | |
1427 | break; | |
1428 | ||
1429 | case set8080CPUCmd: | |
1430 | chiptype = CHIP_TYPE_8080; | |
1431 | break; | |
1432 | ||
1433 | case startTimerInterruptsCmd: | |
1434 | if (simh_dev_set_timeron(NULL, 0, NULL, NULL) == SCPE_OK) { | |
1435 | timerInterrupt = FALSE; | |
1436 | simh_unit.flags |= UNIT_SIMH_TIMERON; | |
1437 | } | |
1438 | break; | |
1439 | ||
1440 | case stopTimerInterruptsCmd: | |
1441 | simh_unit.flags &= ~UNIT_SIMH_TIMERON; | |
1442 | simh_dev_set_timeroff(NULL, 0, NULL, NULL); | |
1443 | break; | |
1444 | ||
1445 | case setTimerDeltaCmd: | |
1446 | setTimerDeltaPos = 0; | |
1447 | break; | |
1448 | ||
1449 | case setTimerInterruptAdrCmd: | |
1450 | setTimerInterruptAdrPos = 0; | |
1451 | break; | |
1452 | ||
1453 | case resetStopWatchCmd: | |
1454 | stopWatchNow = rtc_avail ? sim_os_msec() : 0; | |
1455 | break; | |
1456 | ||
1457 | case readStopWatchCmd: | |
1458 | getStopWatchDeltaPos = 0; | |
1459 | stopWatchDelta = rtc_avail ? sim_os_msec() - stopWatchNow : 0; | |
1460 | break; | |
1461 | ||
1462 | default: | |
1463 | if (simh_unit.flags & UNIT_SIMH_VERBOSE) { | |
1464 | MESSAGE_3("Unknown command (%i) to SIMH pseudo device on port %03xh ignored.", | |
1465 | data, port); | |
1466 | } | |
1467 | } | |
1468 | } | |
1469 | return 0x00; /* ignored, since OUT */ | |
1470 | } | |
1471 | ||
1472 | /* port 0xfe is a device for communication SIMH <--> Altair machine */ | |
1473 | int32 simh_dev(const int32 port, const int32 io, const int32 data) { | |
1474 | return io == 0 ? simh_in(port) : simh_out(port, data); | |
1475 | } |