Commit | Line | Data |
---|---|---|
196ba1fc PH |
1 | /* gri_defs.h: GRI-909 simulator definitions \r |
2 | \r | |
3 | Copyright (c) 2001-2008, Robert M. Supnik\r | |
4 | \r | |
5 | Permission is hereby granted, free of charge, to any person obtaining a\r | |
6 | copy of this software and associated documentation files (the "Software"),\r | |
7 | to deal in the Software without restriction, including without limitation\r | |
8 | the rights to use, copy, modify, merge, publish, distribute, sublicense,\r | |
9 | and/or sell copies of the Software, and to permit persons to whom the\r | |
10 | Software is furnished to do so, subject to the following conditions:\r | |
11 | \r | |
12 | The above copyright notice and this permission notice shall be included in\r | |
13 | all copies or substantial portions of the Software.\r | |
14 | \r | |
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r | |
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r | |
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r | |
18 | ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r | |
19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r | |
20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r | |
21 | \r | |
22 | Except as contained in this notice, the name of Robert M Supnik shall not be\r | |
23 | used in advertising or otherwise to promote the sale, use or other dealings\r | |
24 | in this Software without prior written authorization from Robert M Supnik.\r | |
25 | \r | |
26 | 12-Jan-08 RMS Added GRI-99 support\r | |
27 | 25-Apr-03 RMS Revised for extended file support\r | |
28 | 19-Sep-02 RMS Fixed declarations in gdev structure\r | |
29 | \r | |
30 | There are several discrepancies between the original GRI-909 Reference\r | |
31 | Manual of 1969 and the only surviving code sample, the MIT Crystal Growing\r | |
32 | System of 1972. These discrepancies were clarified by later documentation:\r | |
33 | \r | |
34 | 1. Ref Manual documents two GR's at codes 26-27; MITCS documents six GR's\r | |
35 | at 30-35. Answer: 6 GR's, 26-27 were used for character compares.\r | |
36 | 2. Ref Manual documents only unsigned overflow (carry) for arithmetic\r | |
37 | operator; MITCS uses both unsigned overflow (AOV) and signed overflow\r | |
38 | (SOV). Answer: signed and unsigned.\r | |
39 | 3. Ref Manual documents a ROM-subroutine multiply operator and mentions\r | |
40 | but does not document a "fast multiply"; MITCS uses an extended\r | |
41 | arithmetic operator with multiply, divide, and shift. Answer: EAO\r | |
42 | is a package of ROM subroutines with just four functions: multiply,\r | |
43 | divide, arithmetic right shift, and normalize.\r | |
44 | 4. Is SOV testable even if the FOA is not ADD? Answer: AOV and SOV are\r | |
45 | calculated regardless of the function.\r | |
46 | 5. How does the EAO handle divide overflow? Answer: set link.\r | |
47 | */\r | |
48 | \r | |
49 | #include "sim_defs.h" /* simulator defns */\r | |
50 | \r | |
51 | /* Simulator stop codes */\r | |
52 | \r | |
53 | #define STOP_DEV 1 /* must be 1 */\r | |
54 | #define STOP_HALT 2 /* HALT */\r | |
55 | #define STOP_IBKPT 3 /* breakpoint */\r | |
56 | #define STOP_ILLINT 4 /* illegal intr */\r | |
57 | \r | |
58 | /* Memory */\r | |
59 | \r | |
60 | #define MAXMEMSIZE 32768 /* max memory size */\r | |
61 | #define AMASK 077777 /* logical addr mask */\r | |
62 | #define MEMSIZE (cpu_unit.capac) /* actual memory size */\r | |
63 | #define MEM_ADDR_OK(x) (((uint32) (x)) < MEMSIZE)\r | |
64 | \r | |
65 | /* Architectural constants */\r | |
66 | \r | |
67 | #define SIGN 0100000 /* sign */\r | |
68 | #define INDEX 0100000 /* indexed (GRI-99) */\r | |
69 | #define DMASK 0177777 /* data mask */\r | |
70 | #define CBIT (DMASK + 1) /* carry bit */\r | |
71 | \r | |
72 | /* Instruction format */\r | |
73 | \r | |
74 | #define I_M_SRC 077 /* source */\r | |
75 | #define I_V_SRC 10\r | |
76 | #define I_GETSRC(x) (((x) >> I_V_SRC) & I_M_SRC)\r | |
77 | #define I_M_OP 017 /* operator */\r | |
78 | #define I_V_OP 6\r | |
79 | #define I_GETOP(x) (((x) >> I_V_OP) & I_M_OP)\r | |
80 | #define I_M_DST 077 /* destination */\r | |
81 | #define I_V_DST 0\r | |
82 | #define I_GETDST(x) (((x) >> I_V_DST) & I_M_DST)\r | |
83 | #define SF_V_REASON 1 /* SF reason */\r | |
84 | \r | |
85 | /* IO return */\r | |
86 | \r | |
87 | #define IORETURN(f,v) ((f)? (v): SCPE_OK) /* stop on error */\r | |
88 | \r | |
89 | /* Operators */\r | |
90 | \r | |
91 | #define U_ZERO 000 /* zero */\r | |
92 | #define U_IR 001 /* instruction reg */\r | |
93 | #define U_FSK 002 /* func out/skip */\r | |
94 | #define U_TRP 003 /* trap */\r | |
95 | #define U_ISR 004 /* intr status */\r | |
96 | #define U_MA 005 /* mem addr */\r | |
97 | #define U_MEM 006 /* mem data */\r | |
98 | #define U_SC 007 /* seq counter */\r | |
99 | #define U_SWR 010 /* switch register */\r | |
100 | #define U_AX 011 /* arith in 1 */\r | |
101 | #define U_AY 012 /* arith in 2 */\r | |
102 | #define U_AO 013 /* arith out */\r | |
103 | #define U_EAO 014 /* ext arith */\r | |
104 | #define U_MSR 017 /* machine status */\r | |
105 | #define U_XR 022 /* GRI-99: idx reg */\r | |
106 | #define U_GTRP 023 /* GRI-99: alt trap */\r | |
107 | #define U_BSW 024 /* byte swap */\r | |
108 | #define U_BPK 025 /* byte pack */\r | |
109 | #define U_BCP1 026 /* byte compare 1 */\r | |
110 | #define U_BCP2 027 /* byte compare 2 */\r | |
111 | #define U_GR 030 /* hex general regs */\r | |
112 | #define U_CDR 055 /* card reader */\r | |
113 | #define U_CADR 057\r | |
114 | #define U_DWC 066 /* disk */\r | |
115 | #define U_DCA 067\r | |
116 | #define U_DISK 070\r | |
117 | #define U_LPR 071 /* line printer */\r | |
118 | #define U_CAS 074 /* casette */\r | |
119 | #define U_RTC 075 /* clock */\r | |
120 | #define U_HS 076 /* paper tape */\r | |
121 | #define U_TTY 077 /* console */\r | |
122 | \r | |
123 | struct gdev {\r | |
124 | uint32 (*Src)(uint32); /* source */\r | |
125 | t_stat (*Dst)(uint32, uint32); /* dest */\r | |
126 | t_stat (*FO)(uint32); /* func out */\r | |
127 | uint32 (*SF)(uint32); /* skip func */\r | |
128 | };\r | |
129 | \r | |
130 | /* Trap (jump) */\r | |
131 | \r | |
132 | #define TRP_DIR 00 /* direct */\r | |
133 | #define TRP_DEF 01 /* defer */\r | |
134 | \r | |
135 | /* Interrupt status */\r | |
136 | \r | |
137 | #define ISR_OFF 01 /* int off */\r | |
138 | #define ISR_ON 02 /* int on */\r | |
139 | \r | |
140 | /* Bus modifiers */\r | |
141 | \r | |
142 | #define BUS_COM 002 /* complement */\r | |
143 | #define BUS_FNC 014 /* function mask */\r | |
144 | #define BUS_P1 004 /* + 1 */\r | |
145 | #define BUS_L1 010 /* rotate left */\r | |
146 | #define BUS_R1 014 /* rotate right */\r | |
147 | \r | |
148 | /* Memory address modes */\r | |
149 | \r | |
150 | #define MEM_MOD 03\r | |
151 | #define MEM_DIR 00 /* direct */\r | |
152 | #define MEM_DEF 01 /* defer */\r | |
153 | #define MEM_IMM 02 /* immediate */\r | |
154 | #define MEM_IDF 03 /* immediate defer */\r | |
155 | \r | |
156 | /* Arithmetic unit */\r | |
157 | \r | |
158 | #define FO_V_FOA 8 /* arith func */\r | |
159 | #define FO_M_FOA 03\r | |
160 | #define OP_GET_FOA(x) (((x) >> (FO_V_FOA - I_V_OP)) & FO_M_FOA)\r | |
161 | #define AO_ADD 00 /* add */\r | |
162 | #define AO_AND 01 /* and */\r | |
163 | #define AO_XOR 02 /* xor */\r | |
164 | #define AO_IOR 03 /* or */\r | |
165 | #define EAO_MUL 01 /* multiply */\r | |
166 | #define EAO_DIV 02 /* divide */\r | |
167 | #define EAO_ARS 03 /* arith rshft */\r | |
168 | #define EAO_NORM 04 /* normalize */\r | |
169 | \r | |
170 | /* Machine status */\r | |
171 | \r | |
172 | #define MSR_V_BOV 15 /* bus carry */\r | |
173 | #define MSR_V_L 14 /* bus link */\r | |
174 | #define MSR_V_FOA 8 /* arith func */\r | |
175 | #define MSR_M_FOA 03\r | |
176 | #define MSR_V_SOV 1 /* arith ovflo */\r | |
177 | #define MSR_V_AOV 0 /* arith carry */\r | |
178 | #define MSR_BOV (1u << MSR_V_BOV)\r | |
179 | #define MSR_L (1u << MSR_V_L)\r | |
180 | #define MSR_FOA (MSR_M_FOA << MSR_V_FOA)\r | |
181 | #define MSR_SOV (1u << MSR_V_SOV)\r | |
182 | #define MSR_AOV (1u << MSR_V_AOV)\r | |
183 | #define MSR_GET_FOA(x) (((x) >> MSR_V_FOA) & MSR_M_FOA)\r | |
184 | #define MSR_PUT_FOA(x,n) (((x) & ~(MSR_M_FOA << MSR_V_FOA)) | \\r | |
185 | (((n) & MSR_M_FOA) << MSR_V_FOA))\r | |
186 | #define MSR_RW (MSR_BOV|MSR_L|MSR_FOA|MSR_SOV|MSR_AOV)\r | |
187 | \r | |
188 | /* Real time clock */\r | |
189 | \r | |
190 | #define RTC_OFF 001 /* off */\r | |
191 | #define RTC_ON 002 /* clock on */\r | |
192 | #define RTC_OV 010 /* clock flag */\r | |
193 | #define RTC_CTR 0103 /* counter */\r | |
194 | \r | |
195 | /* Terminal */\r | |
196 | \r | |
197 | #define TTY_ORDY 002 /* output flag */\r | |
198 | #define TTY_IRDY 010 /* input flag */\r | |
199 | \r | |
200 | /* Paper tape */\r | |
201 | \r | |
202 | #define PT_STRT 001 /* start reader */\r | |
203 | #define PT_ORDY 002 /* output flag */\r | |
204 | #define PT_IRDY 010 /* input flag */\r | |
205 | \r | |
206 | /* Interrupt masks (ISR) */\r | |
207 | \r | |
208 | #define INT_V_TTO 0 /* console out */\r | |
209 | #define INT_V_TTI 1 /* console in */\r | |
210 | #define INT_V_HSP 2 /* paper tape punch */\r | |
211 | #define INT_V_HSR 3 /* paper tape reader */\r | |
212 | #define INT_V_LPR 5 /* line printer */\r | |
213 | #define INT_V_CDR 7 /* card reader */\r | |
214 | #define INT_V_CASW 9 /* casette */\r | |
215 | #define INT_V_CASR 10\r | |
216 | #define INT_V_RTC 11 /* clock */\r | |
217 | #define INT_V_DISK 14 /* disk */\r | |
218 | #define INT_V_NODEF 16 /* nodefer */\r | |
219 | #define INT_V_ON 17 /* enable */\r | |
220 | #define INT_TTO (1u << INT_V_TTO)\r | |
221 | #define INT_TTI (1u << INT_V_TTI)\r | |
222 | #define INT_HSP (1u << INT_V_HSP)\r | |
223 | #define INT_HSR (1u << INT_V_HSR)\r | |
224 | #define INT_LPR (1u << INT_V_LPR)\r | |
225 | #define INT_CDR (1u << INT_V_CDR)\r | |
226 | #define INT_CASW (1u << INT_V_CAS1)\r | |
227 | #define INT_CASR (1u << INT_V_CAS2)\r | |
228 | #define INT_RTC (1u << INT_V_RTC)\r | |
229 | #define INT_DISK (1u << INT_V_DISK)\r | |
230 | #define INT_NODEF (1u << INT_V_NODEF)\r | |
231 | #define INT_ON (1u << INT_V_ON)\r | |
232 | #define INT_PENDING (INT_ON | INT_NODEF)\r | |
233 | \r | |
234 | /* Vectors */\r | |
235 | \r | |
236 | #define VEC_BKP 0000 /* breakpoint */\r | |
237 | #define VEC_TTO 0011 /* console out */\r | |
238 | #define VEC_TTI 0014 /* console in */\r | |
239 | #define VEC_HSP 0017 /* paper tape punch */\r | |
240 | #define VEC_HSR 0022 /* paper tape reader */\r | |
241 | #define VEC_LPR 0033 /* line printer */\r | |
242 | #define VEC_CDR 0033 /* card reader */\r | |
243 | #define VEC_CASW 0044 /* casette */\r | |
244 | #define VEC_CASR 0047\r | |
245 | #define VEC_DISK 0055 /* disk */\r | |
246 | #define VEC_RTC 0100 /* clock */\r |