| 1 | /*************************************************************************\r |
| 2 | * *\r |
| 3 | * $Id: s100_mdsad.c 1773 2008-01-11 05:46:19Z hharte $ *\r |
| 4 | * *\r |
| 5 | * Copyright (c) 2007-2008 Howard M. Harte. *\r |
| 6 | * http://www.hartetec.com *\r |
| 7 | * *\r |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining *\r |
| 9 | * a copy of this software and associated documentation files (the *\r |
| 10 | * "Software"), to deal in the Software without restriction, including *\r |
| 11 | * without limitation the rights to use, copy, modify, merge, publish, *\r |
| 12 | * distribute, sublicense, and/or sell copies of the Software, and to *\r |
| 13 | * permit persons to whom the Software is furnished to do so, subject to *\r |
| 14 | * the following conditions: *\r |
| 15 | * *\r |
| 16 | * The above copyright notice and this permission notice shall be *\r |
| 17 | * included in all copies or substantial portions of the Software. *\r |
| 18 | * *\r |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, *\r |
| 20 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *\r |
| 21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND *\r |
| 22 | * NONINFRINGEMENT. IN NO EVENT SHALL HOWARD M. HARTE BE LIABLE FOR ANY *\r |
| 23 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, *\r |
| 24 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE *\r |
| 25 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *\r |
| 26 | * *\r |
| 27 | * Except as contained in this notice, the name of Howard M. Harte shall *\r |
| 28 | * not be used in advertising or otherwise to promote the sale, use or *\r |
| 29 | * other dealings in this Software without prior written authorization *\r |
| 30 | * Howard M. Harte. *\r |
| 31 | * *\r |
| 32 | * SIMH Interface based on altairz80_hdsk.c, by Peter Schorn. *\r |
| 33 | * *\r |
| 34 | * Module Description: *\r |
| 35 | * Northstar MDS-AD Disk Controller module for SIMH *\r |
| 36 | * Only Double-Density is supported for now. *\r |
| 37 | * *\r |
| 38 | * Environment: *\r |
| 39 | * User mode only *\r |
| 40 | * *\r |
| 41 | *************************************************************************/\r |
| 42 | \r |
| 43 | /*#define DBG_MSG*/\r |
| 44 | #include "altairz80_defs.h"\r |
| 45 | \r |
| 46 | #if defined (_WIN32)\r |
| 47 | #include <windows.h>\r |
| 48 | #endif\r |
| 49 | \r |
| 50 | #include "sim_imd.h"\r |
| 51 | \r |
| 52 | #ifdef DBG_MSG\r |
| 53 | #define DBG_PRINT(args) printf args\r |
| 54 | #else\r |
| 55 | #define DBG_PRINT(args)\r |
| 56 | #endif\r |
| 57 | \r |
| 58 | #define SEEK_MSG 0x01\r |
| 59 | #define ORDERS_MSG 0x02\r |
| 60 | #define CMD_MSG 0x04\r |
| 61 | #define RD_DATA_MSG 0x08\r |
| 62 | #define WR_DATA_MSG 0x10\r |
| 63 | #define STATUS_MSG 0x20\r |
| 64 | #define RD_DATA_DETAIL_MSG 0x40\r |
| 65 | #define WR_DATA_DETAIL_MSG 0x80\r |
| 66 | \r |
| 67 | extern uint32 PCX;\r |
| 68 | extern t_stat set_membase(UNIT *uptr, int32 val, char *cptr, void *desc);\r |
| 69 | extern t_stat show_membase(FILE *st, UNIT *uptr, int32 val, void *desc);\r |
| 70 | extern uint32 sim_map_resource(uint32 baseaddr, uint32 size, uint32 resource_type,\r |
| 71 | int32 (*routine)(const int32, const int32, const int32), uint8 unmap);\r |
| 72 | extern REG *sim_PC;\r |
| 73 | \r |
| 74 | #define MDSAD_MAX_DRIVES 4\r |
| 75 | #define MDSAD_SECTOR_LEN 512\r |
| 76 | #define MDSAD_SECTORS_PER_TRACK 10\r |
| 77 | #define MDSAD_TRACKS 35\r |
| 78 | #define MDSAD_RAW_LEN (32 + 2 + MDSAD_SECTOR_LEN + 1)\r |
| 79 | \r |
| 80 | typedef union {\r |
| 81 | struct {\r |
| 82 | uint8 zeros[32];\r |
| 83 | uint8 sync[2];\r |
| 84 | uint8 data[MDSAD_SECTOR_LEN];\r |
| 85 | uint8 checksum;\r |
| 86 | } u;\r |
| 87 | uint8 raw[MDSAD_RAW_LEN];\r |
| 88 | \r |
| 89 | } SECTOR_FORMAT;\r |
| 90 | \r |
| 91 | typedef struct {\r |
| 92 | UNIT *uptr;\r |
| 93 | DISK_INFO *imd;\r |
| 94 | uint8 track;\r |
| 95 | uint8 wp; /* Disk write protected */\r |
| 96 | uint8 sector; /* Current Sector number */\r |
| 97 | uint32 sector_wait_count;\r |
| 98 | } MDSAD_DRIVE_INFO;\r |
| 99 | \r |
| 100 | typedef struct {\r |
| 101 | uint8 dd; /* Controls density on write DD=1 for double density and DD=0 for single density. */\r |
| 102 | uint8 ss; /* Specifies the side of a double-sided diskette. The bottom side (and only side of a single-sided diskette) is selected when SS=0. The second (top) side is selected when SS=1. */\r |
| 103 | uint8 dp; /* has shared use. During stepping operations, DP=O specifies a step out and DP=1 specifies a step in. During write operations, write procompensation is invoked if and only if DP=1. */\r |
| 104 | uint8 st; /* controls the level of the head step signal to the disk drives. */\r |
| 105 | uint8 ds; /* is the drive select field, encoded as follows: */\r |
| 106 | /* 0=no drive selected\r |
| 107 | * 1=drive 1 selected\r |
| 108 | * 2=drive 2 selected\r |
| 109 | * 4=drive 3 selected\r |
| 110 | * 8=drive 4 selected\r |
| 111 | */\r |
| 112 | } ORDERS;\r |
| 113 | \r |
| 114 | typedef struct {\r |
| 115 | uint8 sf; /* Sector Flag: set when sector hole detected, reset by software. */\r |
| 116 | uint8 ix; /* Index Detect: true if index hole detected during previous sector. */\r |
| 117 | uint8 dd; /* Double Density Indicator: true if data being read is encoded in double density. */\r |
| 118 | uint8 mo; /* Motor On: true while motor(s) are on. */\r |
| 119 | } COM_STATUS;\r |
| 120 | \r |
| 121 | typedef struct {\r |
| 122 | uint8 wi; /* Window: true during 96-microsecond window at beginning of sector. */\r |
| 123 | uint8 re; /* Read Enable: true while phase-locked loop is enabled. */\r |
| 124 | uint8 sp; /* Spare: reserved for future use. */\r |
| 125 | uint8 bd; /* Body: set when sync character is detected. */\r |
| 126 | } A_STATUS;\r |
| 127 | \r |
| 128 | typedef struct {\r |
| 129 | uint8 wr; /* Write: true during valid write operation. */\r |
| 130 | uint8 sp; /* Spare: reserved for future use. */\r |
| 131 | uint8 wp; /* Write Protect: true while the diskette installed in the selected drive is write protected. */\r |
| 132 | uint8 t0; /* Track 0: true if selected drive is at track zero. */\r |
| 133 | } B_STATUS;\r |
| 134 | \r |
| 135 | typedef struct {\r |
| 136 | uint8 sc; /* Sector Counter: indicates the current sector position. */\r |
| 137 | } C_STATUS;\r |
| 138 | \r |
| 139 | typedef struct {\r |
| 140 | PNP_INFO pnp; /* Plug and Play */\r |
| 141 | \r |
| 142 | ORDERS orders;\r |
| 143 | COM_STATUS com_status;\r |
| 144 | A_STATUS a_status;\r |
| 145 | B_STATUS b_status;\r |
| 146 | C_STATUS c_status;\r |
| 147 | \r |
| 148 | uint8 int_enable; /* Interrupt Enable */\r |
| 149 | uint32 datacount; /* Number of data bytes transferred from controller for current sector */\r |
| 150 | MDSAD_DRIVE_INFO drive[MDSAD_MAX_DRIVES];\r |
| 151 | } MDSAD_INFO;\r |
| 152 | \r |
| 153 | static MDSAD_INFO mdsad_info_data = { { 0xE800, 1024, 0, 0 } };\r |
| 154 | static MDSAD_INFO *mdsad_info = &mdsad_info_data;\r |
| 155 | \r |
| 156 | static SECTOR_FORMAT sdata;\r |
| 157 | \r |
| 158 | #define UNIT_V_MDSAD_WLK (UNIT_V_UF + 0) /* write locked */\r |
| 159 | #define UNIT_MDSAD_WLK (1 << UNIT_V_MDSAD_WLK)\r |
| 160 | #define UNIT_V_MDSAD_VERBOSE (UNIT_V_UF + 1) /* verbose mode, i.e. show error messages */\r |
| 161 | #define UNIT_MDSAD_VERBOSE (1 << UNIT_V_MDSAD_VERBOSE)\r |
| 162 | #define MDSAD_CAPACITY (70*10*MDSAD_SECTOR_LEN) /* Default North Star Disk Capacity */\r |
| 163 | #define IMAGE_TYPE_DSK 1 /* Flat binary "DSK" image file. */\r |
| 164 | #define IMAGE_TYPE_IMD 2 /* ImageDisk "IMD" image file. */\r |
| 165 | #define IMAGE_TYPE_CPT 3 /* CP/M Transfer "CPT" image file. */\r |
| 166 | \r |
| 167 | /* MDS-AD Controller Subcases */\r |
| 168 | #define MDSAD_READ_ROM 0\r |
| 169 | #define MDSAD_WRITE_DATA 1\r |
| 170 | #define MDSAD_CTLR_ORDERS 2\r |
| 171 | #define MDSAD_CTLR_COMMAND 3\r |
| 172 | \r |
| 173 | /* MDS-AD Controller Commands */\r |
| 174 | #define MDSAD_CMD_NOP 0\r |
| 175 | #define MDSAD_CMD_RESET_SF 1\r |
| 176 | #define MDSAD_CMD_INTR_DIS 2\r |
| 177 | #define MDSAD_CMD_INTR_ARM 3\r |
| 178 | #define MDSAD_CMD_SET_BODY 4\r |
| 179 | #define MDSAD_CMD_MOTORS_ON 5\r |
| 180 | #define MDSAD_CMD_BEGIN_WR 6\r |
| 181 | #define MDSAD_CMD_RESET 7\r |
| 182 | \r |
| 183 | /* MDS-AD Data returned on DI bus */\r |
| 184 | #define MDSAD_A_STATUS 1\r |
| 185 | #define MDSAD_B_STATUS 2\r |
| 186 | #define MDSAD_C_STATUS 3\r |
| 187 | #define MDSAD_READ_DATA 4\r |
| 188 | \r |
| 189 | /* MDS-AD status byte masks */\r |
| 190 | /* A-Status */\r |
| 191 | #define MDSAD_A_SF 0x80\r |
| 192 | #define MDSAD_A_IX 0x40\r |
| 193 | #define MDSAD_A_DD 0x20\r |
| 194 | #define MDSAD_A_MO 0x10\r |
| 195 | #define MDSAD_A_WI 0x08\r |
| 196 | #define MDSAD_A_RE 0x04\r |
| 197 | #define MDSAD_A_SP 0x02\r |
| 198 | #define MDSAD_A_BD 0x01\r |
| 199 | \r |
| 200 | /* B-Status */\r |
| 201 | #define MDSAD_B_SF 0x80\r |
| 202 | #define MDSAD_B_IX 0x40\r |
| 203 | #define MDSAD_B_DD 0x20\r |
| 204 | #define MDSAD_B_MO 0x10\r |
| 205 | #define MDSAD_B_WR 0x08\r |
| 206 | #define MDSAD_B_SP 0x04\r |
| 207 | #define MDSAD_B_WP 0x02\r |
| 208 | #define MDSAD_B_T0 0x01\r |
| 209 | \r |
| 210 | /* C-Status */\r |
| 211 | #define MDSAD_C_SF 0x80\r |
| 212 | #define MDSAD_C_IX 0x40\r |
| 213 | #define MDSAD_C_DD 0x20\r |
| 214 | #define MDSAD_C_MO 0x10\r |
| 215 | #define MDSAD_C_SC 0x0f\r |
| 216 | \r |
| 217 | /* Local function prototypes */\r |
| 218 | static t_stat mdsad_reset(DEVICE *mdsad_dev);\r |
| 219 | static t_stat mdsad_attach(UNIT *uptr, char *cptr);\r |
| 220 | static t_stat mdsad_detach(UNIT *uptr);\r |
| 221 | static t_stat mdsad_boot(int32 unitno, DEVICE *dptr);\r |
| 222 | static uint8 MDSAD_Read(const uint32 Addr);\r |
| 223 | \r |
| 224 | static int32 mdsaddev(const int32 Addr, const int32 rw, const int32 data);\r |
| 225 | \r |
| 226 | static int32 trace_level = 0;\r |
| 227 | \r |
| 228 | static UNIT mdsad_unit[] = {\r |
| 229 | { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MDSAD_CAPACITY) },\r |
| 230 | { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MDSAD_CAPACITY) },\r |
| 231 | { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MDSAD_CAPACITY) },\r |
| 232 | { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MDSAD_CAPACITY) }\r |
| 233 | };\r |
| 234 | \r |
| 235 | static REG mdsad_reg[] = {\r |
| 236 | { HRDATA (TRACELEVEL, trace_level, 16), },\r |
| 237 | { NULL }\r |
| 238 | };\r |
| 239 | \r |
| 240 | static MTAB mdsad_mod[] = {\r |
| 241 | { MTAB_XTD|MTAB_VDV, 0, "MEMBASE", "MEMBASE", &set_membase, &show_membase, NULL },\r |
| 242 | { UNIT_MDSAD_WLK, 0, "WRTENB", "WRTENB", NULL },\r |
| 243 | { UNIT_MDSAD_WLK, UNIT_MDSAD_WLK, "WRTLCK", "WRTLCK", NULL },\r |
| 244 | /* quiet, no warning messages */\r |
| 245 | { UNIT_MDSAD_VERBOSE, 0, "QUIET", "QUIET", NULL },\r |
| 246 | /* verbose, show warning messages */\r |
| 247 | { UNIT_MDSAD_VERBOSE, UNIT_MDSAD_VERBOSE, "VERBOSE", "VERBOSE", NULL },\r |
| 248 | { 0 }\r |
| 249 | };\r |
| 250 | \r |
| 251 | DEVICE mdsad_dev = {\r |
| 252 | "MDSAD", mdsad_unit, mdsad_reg, mdsad_mod,\r |
| 253 | MDSAD_MAX_DRIVES, 10, 31, 1, MDSAD_MAX_DRIVES, MDSAD_MAX_DRIVES,\r |
| 254 | NULL, NULL, &mdsad_reset,\r |
| 255 | &mdsad_boot, &mdsad_attach, &mdsad_detach,\r |
| 256 | &mdsad_info_data, (DEV_DISABLE | DEV_DIS), 0,\r |
| 257 | NULL, NULL, NULL\r |
| 258 | };\r |
| 259 | \r |
| 260 | /* Reset routine */\r |
| 261 | t_stat mdsad_reset(DEVICE *dptr)\r |
| 262 | {\r |
| 263 | PNP_INFO *pnp = (PNP_INFO *)dptr->ctxt;\r |
| 264 | \r |
| 265 | if(dptr->flags & DEV_DIS) {\r |
| 266 | sim_map_resource(pnp->mem_base, pnp->mem_size,\r |
| 267 | RESOURCE_TYPE_MEMORY, &mdsaddev, TRUE);\r |
| 268 | } else {\r |
| 269 | /* Connect MDSAD at base address */\r |
| 270 | if(sim_map_resource(pnp->mem_base, pnp->mem_size,\r |
| 271 | RESOURCE_TYPE_MEMORY, &mdsaddev, FALSE) != 0) {\r |
| 272 | printf("%s: error mapping resource at 0x%04x\n",\r |
| 273 | __FUNCTION__, pnp->mem_base);\r |
| 274 | dptr->flags |= DEV_DIS;\r |
| 275 | return SCPE_ARG;\r |
| 276 | }\r |
| 277 | }\r |
| 278 | return SCPE_OK;\r |
| 279 | }\r |
| 280 | \r |
| 281 | /* Attach routine */\r |
| 282 | t_stat mdsad_attach(UNIT *uptr, char *cptr)\r |
| 283 | {\r |
| 284 | char header[4];\r |
| 285 | t_stat r;\r |
| 286 | unsigned int i = 0;\r |
| 287 | \r |
| 288 | r = attach_unit(uptr, cptr); /* attach unit */\r |
| 289 | if(r != SCPE_OK) /* error? */\r |
| 290 | return r;\r |
| 291 | \r |
| 292 | /* Determine length of this disk */\r |
| 293 | if(sim_fsize(uptr->fileref) != 0) {\r |
| 294 | uptr->capac = sim_fsize(uptr->fileref);\r |
| 295 | } else {\r |
| 296 | uptr->capac = MDSAD_CAPACITY;\r |
| 297 | }\r |
| 298 | \r |
| 299 | for(i = 0; i < MDSAD_MAX_DRIVES; i++) {\r |
| 300 | mdsad_info->drive[i].uptr = &mdsad_dev.units[i];\r |
| 301 | }\r |
| 302 | \r |
| 303 | for(i = 0; i < MDSAD_MAX_DRIVES; i++) {\r |
| 304 | if(mdsad_dev.units[i].fileref == uptr->fileref) {\r |
| 305 | break;\r |
| 306 | }\r |
| 307 | }\r |
| 308 | \r |
| 309 | /* Default for new file is DSK */\r |
| 310 | uptr->u3 = IMAGE_TYPE_DSK;\r |
| 311 | \r |
| 312 | if(uptr->capac > 0) {\r |
| 313 | fgets(header, 4, uptr->fileref);\r |
| 314 | if(!strcmp(header, "IMD")) {\r |
| 315 | uptr->u3 = IMAGE_TYPE_IMD;\r |
| 316 | } else if(!strcmp(header, "CPT")) {\r |
| 317 | printf("CPT images not yet supported\n");\r |
| 318 | uptr->u3 = IMAGE_TYPE_CPT;\r |
| 319 | mdsad_detach(uptr);\r |
| 320 | return SCPE_OPENERR;\r |
| 321 | } else {\r |
| 322 | uptr->u3 = IMAGE_TYPE_DSK;\r |
| 323 | }\r |
| 324 | }\r |
| 325 | \r |
| 326 | if (uptr->flags & UNIT_MDSAD_VERBOSE)\r |
| 327 | printf("MDSAD%d, attached to '%s', type=%s, len=%d\n", i, cptr,\r |
| 328 | uptr->u3 == IMAGE_TYPE_IMD ? "IMD" : uptr->u3 == IMAGE_TYPE_CPT ? "CPT" : "DSK",\r |
| 329 | uptr->capac);\r |
| 330 | \r |
| 331 | if(uptr->u3 == IMAGE_TYPE_IMD) {\r |
| 332 | if(uptr->capac < 318000) {\r |
| 333 | printf("Cannot create IMD files with SIMH.\nCopy an existing file and format it with CP/M.\n");\r |
| 334 | mdsad_detach(uptr);\r |
| 335 | return SCPE_OPENERR;\r |
| 336 | }\r |
| 337 | \r |
| 338 | if (uptr->flags & UNIT_MDSAD_VERBOSE)\r |
| 339 | printf("--------------------------------------------------------\n");\r |
| 340 | mdsad_info->drive[i].imd = diskOpen((uptr->fileref), (uptr->flags & UNIT_MDSAD_VERBOSE));\r |
| 341 | if (uptr->flags & UNIT_MDSAD_VERBOSE)\r |
| 342 | printf("\n");\r |
| 343 | } else {\r |
| 344 | mdsad_info->drive[i].imd = NULL;\r |
| 345 | }\r |
| 346 | \r |
| 347 | return SCPE_OK;\r |
| 348 | }\r |
| 349 | \r |
| 350 | \r |
| 351 | /* Detach routine */\r |
| 352 | t_stat mdsad_detach(UNIT *uptr)\r |
| 353 | {\r |
| 354 | t_stat r;\r |
| 355 | int8 i;\r |
| 356 | \r |
| 357 | for(i = 0; i < MDSAD_MAX_DRIVES; i++) {\r |
| 358 | if(mdsad_dev.units[i].fileref == uptr->fileref) {\r |
| 359 | break;\r |
| 360 | }\r |
| 361 | }\r |
| 362 | \r |
| 363 | if (i >= MDSAD_MAX_DRIVES) return SCPE_ARG;\r |
| 364 | \r |
| 365 | DBG_PRINT(("Detach MDSAD%d\n", i));\r |
| 366 | diskClose(mdsad_info->drive[i].imd);\r |
| 367 | \r |
| 368 | r = detach_unit(uptr); /* detach unit */\r |
| 369 | if(r != SCPE_OK)\r |
| 370 | return r;\r |
| 371 | \r |
| 372 | mdsad_dev.units[i].fileref = NULL; /* psco check if ok */\r |
| 373 | return SCPE_OK;\r |
| 374 | }\r |
| 375 | \r |
| 376 | static t_stat mdsad_boot(int32 unitno, DEVICE *dptr)\r |
| 377 | {\r |
| 378 | \r |
| 379 | PNP_INFO *pnp = (PNP_INFO *)dptr->ctxt;\r |
| 380 | \r |
| 381 | DBG_PRINT(("Booting MDSAD Controller at 0x%04x, unit %d" NLP,\r |
| 382 | pnp->mem_base+1+(unitno&3), unitno & 3));\r |
| 383 | \r |
| 384 | /* Unit 3 can't be booted yet. This involves modifying the A register. */\r |
| 385 | *((int32 *) sim_PC->loc) = pnp->mem_base+1+(unitno&3);\r |
| 386 | return SCPE_OK;\r |
| 387 | }\r |
| 388 | \r |
| 389 | static int32 mdsaddev(const int32 Addr, const int32 rw, const int32 data)\r |
| 390 | {\r |
| 391 | if(rw == 0) { /* Read */\r |
| 392 | return(MDSAD_Read(Addr));\r |
| 393 | } else { /* Write */\r |
| 394 | DBG_PRINT(("MDSAD: write attempt at 0x%04x ignored." NLP, Addr));\r |
| 395 | return (-1);\r |
| 396 | }\r |
| 397 | }\r |
| 398 | \r |
| 399 | /* This ROM image is taken from the Solace Emulator, which uses */\r |
| 400 | /* a ROM from a "Micro Complex Phase Lock II" dual- */\r |
| 401 | /* density controller card. It is supposedly compatible with the */\r |
| 402 | /* Northstar-designed dual density floppy controller. It has the */\r |
| 403 | /* interesting property that by jumping to base_addr+0 (or +1) and */\r |
| 404 | /* it boots from floppy 0; jump to base_addr+2 you boot from floppy 1; */\r |
| 405 | /* jump to base_addr+3 and you boot from floppy 2. You can boot from */\r |
| 406 | /* floppy 3 by loading A with 08H and jumping to base_addr+7. */\r |
| 407 | static uint8 mdsad_rom[] = {\r |
| 408 | 0x44, 0x01, 0x01, 0x01, 0x82, 0x84, 0x78, 0xE6, 0x07, 0x4F, 0x00, 0x31, 0x30, 0x00, 0x21, 0x29, /* 0x00 */\r |
| 409 | 0x00, 0xE5, 0x21, 0x2C, 0xC2, 0xE5, 0x21, 0x77, 0x13, 0xE5, 0x21, 0xC9, 0x1A, 0xE5, 0xCD, 0x28, /* 0x10 */\r |
| 410 | 0x00, 0x21, 0x30, 0x00, 0x5B, 0x52, 0x44, 0x54, 0x5D, 0x3A, 0x27, 0x00, 0x57, 0xC3, 0x29, 0x00, /* 0x20 */\r |
| 411 | 0x14, 0x14, 0x1E, 0x15, 0x1A, 0x26, 0x30, 0xCD, 0xD9, 0x00, 0x42, 0x05, 0x0A, 0xCD, 0xD4, 0x00, /* 0x30 */\r |
| 412 | 0x2E, 0x0D, 0x2D, 0xCA, 0x43, 0x00, 0xCD, 0xD7, 0x00, 0x1A, 0xE6, 0x40, 0xCA, 0x42, 0x00, 0x3E, /* 0x40 */\r |
| 413 | 0x0A, 0xF5, 0xCD, 0xC1, 0x00, 0x1E, 0x20, 0x1A, 0xE6, 0x01, 0xC2, 0x63, 0x00, 0xCD, 0xC5, 0x00, /* 0x50 */\r |
| 414 | 0xC3, 0x55, 0x00, 0x2E, 0x04, 0xCD, 0xE7, 0x00, 0x1E, 0x10, 0x1A, 0xE6, 0x04, 0xCA, 0x68, 0x00, /* 0x60 */\r |
| 415 | 0x3E, 0x09, 0x3D, 0xC2, 0x72, 0x00, 0x1A, 0xE6, 0x20, 0xC2, 0x84, 0x00, 0xCD, 0xC1, 0x00, 0x2E, /* 0x70 */\r |
| 416 | 0x08, 0xCD, 0xE7, 0x00, 0x06, 0xA3, 0x1E, 0x10, 0x05, 0xCA, 0xF4, 0x00, 0x1A, 0x0F, 0xD2, 0x88, /* 0x80 */\r |
| 417 | 0x00, 0x1E, 0x40, 0x1A, 0x67, 0x2E, 0x00, 0x36, 0x59, 0x07, 0x47, 0x23, 0x1A, 0x77, 0xA8, 0x07, /* 0x90 */\r |
| 418 | 0x47, 0x2C, 0xC2, 0x9C, 0x00, 0x24, 0x1A, 0x77, 0xA8, 0x07, 0x47, 0x2C, 0xC2, 0xA6, 0x00, 0x1A, /* 0xA0 */\r |
| 419 | 0xA8, 0xC2, 0xF4, 0x00, 0x25, 0x2E, 0x03, 0x71, 0x2D, 0x36, 0x59, 0xC2, 0xB8, 0x00, 0x2E, 0x0A, /* 0xB0 */\r |
| 420 | 0xE9, 0x3E, 0x20, 0x81, 0x4F, 0x0A, 0x3E, 0x10, 0x81, 0x4F, 0x0A, 0x3E, 0xF0, 0x81, 0x4F, 0x0A, /* 0xC0 */\r |
| 421 | 0x79, 0xE6, 0x0F, 0x4F, 0xCD, 0xD7, 0x00, 0x26, 0x01, 0x1E, 0x11, 0x1A, 0x1D, 0x1A, 0xB7, 0xF2, /* 0xD0 */\r |
| 422 | 0xDD, 0x00, 0x25, 0xC2, 0xD9, 0x00, 0xC9, 0xCD, 0xD7, 0x00, 0x1E, 0x35, 0x1A, 0xE6, 0x0F, 0xBD, /* 0xE0 */\r |
| 423 | 0xC2, 0xE7, 0x00, 0xC9, 0xF1, 0x3D, 0xF5, 0xC2, 0x55, 0x00, 0xC3, 0xFA, 0x00, 0x52, 0x44, 0x54 /* 0xF0 */\r |
| 424 | };\r |
| 425 | \r |
| 426 | static void showdata(int32 isRead) {\r |
| 427 | int32 i;\r |
| 428 | printf("MDSAD: " ADDRESS_FORMAT " %s Sector =" NLP "\t", PCX, isRead ? "Read" : "Write");\r |
| 429 | for(i=0; i < MDSAD_SECTOR_LEN; i++) {\r |
| 430 | printf("%02X ", sdata.u.data[i]);\r |
| 431 | if(((i+1) & 0xf) == 0) printf(NLP "\t");\r |
| 432 | }\r |
| 433 | printf(NLP);\r |
| 434 | }\r |
| 435 | \r |
| 436 | static int checksum;\r |
| 437 | static uint32 sec_offset;\r |
| 438 | \r |
| 439 | static uint8 MDSAD_Read(const uint32 Addr)\r |
| 440 | {\r |
| 441 | uint8 cData;\r |
| 442 | uint8 ds;\r |
| 443 | MDSAD_DRIVE_INFO *pDrive;\r |
| 444 | \r |
| 445 | cData = 0x00;\r |
| 446 | \r |
| 447 | pDrive = &mdsad_info->drive[mdsad_info->orders.ds];\r |
| 448 | \r |
| 449 | switch( (Addr & 0x300) >> 8 ) {\r |
| 450 | case MDSAD_READ_ROM:\r |
| 451 | cData = mdsad_rom[Addr & 0xFF];\r |
| 452 | break;\r |
| 453 | case MDSAD_WRITE_DATA:\r |
| 454 | {\r |
| 455 | unsigned int flags = 0;\r |
| 456 | unsigned int writelen;\r |
| 457 | \r |
| 458 | if(mdsad_info->datacount == 0) {\r |
| 459 | TRACE_PRINT(WR_DATA_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 460 | " WRITE Start: Drive: %d, Track=%d, Head=%d, Sector=%d" NLP,\r |
| 461 | PCX,\r |
| 462 | mdsad_info->orders.ds,\r |
| 463 | pDrive->track,\r |
| 464 | mdsad_info->orders.ss,\r |
| 465 | pDrive->sector));\r |
| 466 | \r |
| 467 | sec_offset = (pDrive->track * (MDSAD_SECTOR_LEN * MDSAD_SECTORS_PER_TRACK)) +\r |
| 468 | (mdsad_info->orders.ss * ((MDSAD_SECTOR_LEN * MDSAD_SECTORS_PER_TRACK) * MDSAD_TRACKS)) +\r |
| 469 | (pDrive->sector * MDSAD_SECTOR_LEN);\r |
| 470 | \r |
| 471 | }\r |
| 472 | \r |
| 473 | DBG_PRINT(("MDSAD: " ADDRESS_FORMAT\r |
| 474 | " WRITE-DATA[offset:%06x+%03x]=%02x" NLP,\r |
| 475 | PCX, sec_offset, mdsad_info->datacount, Addr & 0xFF));\r |
| 476 | mdsad_info->datacount++;\r |
| 477 | if(mdsad_info->datacount < MDSAD_RAW_LEN)\r |
| 478 | sdata.raw[mdsad_info->datacount] = Addr & 0xFF;\r |
| 479 | \r |
| 480 | if(mdsad_info->datacount == (MDSAD_RAW_LEN - 1)) {\r |
| 481 | TRACE_PRINT(WR_DATA_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 482 | " Write Complete" NLP, PCX));\r |
| 483 | \r |
| 484 | if ((pDrive->uptr == NULL) || (pDrive->uptr->fileref == NULL)) {\r |
| 485 | TRACE_PRINT(WR_DATA_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 486 | " Drive: %d not attached - write ignored." NLP,\r |
| 487 | PCX, mdsad_info->orders.ds));\r |
| 488 | return 0x00;\r |
| 489 | }\r |
| 490 | if(trace_level & WR_DATA_DETAIL_MSG) showdata(FALSE);\r |
| 491 | switch((pDrive->uptr)->u3)\r |
| 492 | {\r |
| 493 | case IMAGE_TYPE_IMD:\r |
| 494 | if(pDrive->imd == NULL) {\r |
| 495 | printf(".imd is NULL!" NLP);\r |
| 496 | }\r |
| 497 | sectWrite(pDrive->imd,\r |
| 498 | pDrive->track,\r |
| 499 | mdsad_info->orders.ss,\r |
| 500 | pDrive->sector,\r |
| 501 | sdata.u.data,\r |
| 502 | MDSAD_SECTOR_LEN,\r |
| 503 | &flags,\r |
| 504 | &writelen);\r |
| 505 | break;\r |
| 506 | case IMAGE_TYPE_DSK:\r |
| 507 | if(pDrive->uptr->fileref == NULL) {\r |
| 508 | printf(".fileref is NULL!" NLP);\r |
| 509 | } else {\r |
| 510 | fseek((pDrive->uptr)->fileref, sec_offset, SEEK_SET);\r |
| 511 | fwrite(sdata.u.data, MDSAD_SECTOR_LEN, 1,\r |
| 512 | (pDrive->uptr)->fileref);\r |
| 513 | }\r |
| 514 | break;\r |
| 515 | case IMAGE_TYPE_CPT:\r |
| 516 | printf("%s: CPT Format not supported" NLP, __FUNCTION__);\r |
| 517 | break;\r |
| 518 | default:\r |
| 519 | printf("%s: Unknown image Format" NLP, __FUNCTION__);\r |
| 520 | break;\r |
| 521 | }\r |
| 522 | }\r |
| 523 | break;\r |
| 524 | }\r |
| 525 | case MDSAD_CTLR_ORDERS:\r |
| 526 | mdsad_info->orders.dd = (Addr & 0x80) >> 7;\r |
| 527 | mdsad_info->orders.ss = (Addr & 0x40) >> 6;\r |
| 528 | mdsad_info->orders.dp = (Addr & 0x20) >> 5;\r |
| 529 | mdsad_info->orders.st = (Addr & 0x10) >> 4;\r |
| 530 | mdsad_info->orders.ds = (Addr & 0x0F);\r |
| 531 | \r |
| 532 | ds = mdsad_info->orders.ds;\r |
| 533 | switch(mdsad_info->orders.ds) {\r |
| 534 | case 0:\r |
| 535 | case 1:\r |
| 536 | mdsad_info->orders.ds = 0;\r |
| 537 | break;\r |
| 538 | case 2:\r |
| 539 | mdsad_info->orders.ds = 1;\r |
| 540 | break;\r |
| 541 | case 4:\r |
| 542 | mdsad_info->orders.ds = 2;\r |
| 543 | break;\r |
| 544 | case 8:\r |
| 545 | mdsad_info->orders.ds = 3;\r |
| 546 | break;\r |
| 547 | }\r |
| 548 | \r |
| 549 | TRACE_PRINT(ORDERS_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 550 | " Controller Orders: Drive=%x[%x], DD=%d, SS=%d, DP=%d, ST=%d" NLP,\r |
| 551 | PCX,\r |
| 552 | mdsad_info->orders.ds, ds,\r |
| 553 | mdsad_info->orders.dd,\r |
| 554 | mdsad_info->orders.ss,\r |
| 555 | mdsad_info->orders.dp,\r |
| 556 | mdsad_info->orders.st));\r |
| 557 | \r |
| 558 | /* use latest selected drive */\r |
| 559 | pDrive = &mdsad_info->drive[mdsad_info->orders.ds];\r |
| 560 | \r |
| 561 | if(mdsad_info->orders.st == 1) {\r |
| 562 | if(mdsad_info->orders.dp == 0) {\r |
| 563 | TRACE_PRINT(SEEK_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 564 | " Step out: Track=%d%s" NLP, PCX, pDrive->track,\r |
| 565 | pDrive->track == 0 ? "[Warn: already at 0]" : ""));\r |
| 566 | if(pDrive->track > 0) /* anything to do? */\r |
| 567 | pDrive->track--;\r |
| 568 | } else {\r |
| 569 | TRACE_PRINT(SEEK_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 570 | " Step in: Track=%d%s" NLP, PCX, pDrive->track,\r |
| 571 | pDrive->track == (MDSAD_TRACKS - 1) ?\r |
| 572 | "[Warn: already at highest track]" : ""));\r |
| 573 | if(pDrive->track < (MDSAD_TRACKS - 1)) /* anything to do? */\r |
| 574 | pDrive->track++;\r |
| 575 | }\r |
| 576 | }\r |
| 577 | /* always update t0 */\r |
| 578 | mdsad_info->b_status.t0 = (pDrive->track == 0);\r |
| 579 | break;\r |
| 580 | case MDSAD_CTLR_COMMAND:\r |
| 581 | /* TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT " DM=%x" NLP, PCX, (Addr & 0xF0) >> 4)); */\r |
| 582 | switch(Addr & 0x0F) {\r |
| 583 | case MDSAD_CMD_MOTORS_ON:\r |
| 584 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 585 | " CMD=Motors On" NLP, PCX));\r |
| 586 | mdsad_info->com_status.mo = 1; /* Turn motors on */\r |
| 587 | break;\r |
| 588 | \r |
| 589 | case MDSAD_CMD_NOP:\r |
| 590 | pDrive->sector_wait_count++;\r |
| 591 | switch(pDrive->sector_wait_count) {\r |
| 592 | case 10:\r |
| 593 | {\r |
| 594 | mdsad_info->com_status.sf = 1;\r |
| 595 | mdsad_info->a_status.wi = 0;\r |
| 596 | mdsad_info->a_status.re = 0;\r |
| 597 | mdsad_info->a_status.bd = 0;\r |
| 598 | pDrive->sector_wait_count = 0;\r |
| 599 | pDrive->sector++;\r |
| 600 | if(pDrive->sector >= MDSAD_SECTORS_PER_TRACK) {\r |
| 601 | pDrive->sector = 0;\r |
| 602 | mdsad_info->com_status.ix = 1;\r |
| 603 | } else {\r |
| 604 | mdsad_info->com_status.ix = 0;\r |
| 605 | }\r |
| 606 | break;\r |
| 607 | }\r |
| 608 | case 2:\r |
| 609 | mdsad_info->a_status.wi = 1;\r |
| 610 | break;\r |
| 611 | case 3:\r |
| 612 | mdsad_info->a_status.re = 1;\r |
| 613 | mdsad_info->a_status.bd = 1;\r |
| 614 | break;\r |
| 615 | default:\r |
| 616 | break;\r |
| 617 | }\r |
| 618 | break;\r |
| 619 | case MDSAD_CMD_RESET_SF:\r |
| 620 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 621 | " CMD=Reset Sector Flag" NLP, PCX));\r |
| 622 | mdsad_info->com_status.sf = 0;\r |
| 623 | mdsad_info->datacount = 0;\r |
| 624 | break;\r |
| 625 | case MDSAD_CMD_INTR_DIS:\r |
| 626 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 627 | " CMD=Disarm Interrupt" NLP, PCX));\r |
| 628 | mdsad_info->int_enable = 0;\r |
| 629 | break;\r |
| 630 | case MDSAD_CMD_INTR_ARM:\r |
| 631 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 632 | " CMD=Arm Interrupt" NLP, PCX));\r |
| 633 | mdsad_info->int_enable = 1;\r |
| 634 | break;\r |
| 635 | case MDSAD_CMD_SET_BODY:\r |
| 636 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 637 | " CMD=Set Body (Diagnostic)" NLP, PCX));\r |
| 638 | break;\r |
| 639 | case MDSAD_CMD_BEGIN_WR:\r |
| 640 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 641 | " CMD=Begin Write" NLP, PCX));\r |
| 642 | break;\r |
| 643 | case MDSAD_CMD_RESET:\r |
| 644 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 645 | " CMD=Reset Controller" NLP, PCX));\r |
| 646 | mdsad_info->com_status.mo = 0; /* Turn motors off */\r |
| 647 | break;\r |
| 648 | default:\r |
| 649 | TRACE_PRINT(CMD_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 650 | " Unsupported CMD=0x%x" NLP, PCX, Addr & 0x0F));\r |
| 651 | break;\r |
| 652 | }\r |
| 653 | \r |
| 654 | /* Always Double-Density for now... */\r |
| 655 | mdsad_info->com_status.dd = 1;\r |
| 656 | \r |
| 657 | cData = (mdsad_info->com_status.sf & 1) << 7;\r |
| 658 | cData |= (mdsad_info->com_status.ix & 1) << 6;\r |
| 659 | cData |= (mdsad_info->com_status.dd & 1) << 5;\r |
| 660 | cData |= (mdsad_info->com_status.mo & 1) << 4;\r |
| 661 | \r |
| 662 | mdsad_info->c_status.sc = pDrive->sector;\r |
| 663 | \r |
| 664 | switch( (Addr & 0xF0) >> 4) {\r |
| 665 | case MDSAD_A_STATUS: /* A-STATUS */\r |
| 666 | cData |= (mdsad_info->a_status.wi & 1) << 3;\r |
| 667 | cData |= (mdsad_info->a_status.re & 1) << 2;\r |
| 668 | cData |= (mdsad_info->a_status.sp & 1) << 1;\r |
| 669 | cData |= (mdsad_info->a_status.bd & 1);\r |
| 670 | TRACE_PRINT(STATUS_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 671 | " A-Status = <%s %s %s %s %s %s %s %s>" NLP, PCX,\r |
| 672 | cData & MDSAD_A_SF ? "SF" : " ",\r |
| 673 | cData & MDSAD_A_IX ? "IX" : " ",\r |
| 674 | cData & MDSAD_A_DD ? "DD" : " ",\r |
| 675 | cData & MDSAD_A_MO ? "MO" : " ",\r |
| 676 | cData & MDSAD_A_WI ? "WI" : " ",\r |
| 677 | cData & MDSAD_A_RE ? "RE" : " ",\r |
| 678 | cData & MDSAD_A_SP ? "SP" : " ",\r |
| 679 | cData & MDSAD_A_BD ? "BD" : " "));\r |
| 680 | break;\r |
| 681 | case MDSAD_B_STATUS: /* B-STATUS */\r |
| 682 | cData |= (mdsad_info->b_status.wr & 1) << 3;\r |
| 683 | cData |= (mdsad_info->b_status.sp & 1) << 2;\r |
| 684 | cData |= (mdsad_info->b_status.wp & 1) << 1;\r |
| 685 | cData |= (mdsad_info->b_status.t0 & 1);\r |
| 686 | TRACE_PRINT(STATUS_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 687 | " B-Status = <%s %s %s %s %s %s %s %s>" NLP, PCX,\r |
| 688 | cData & MDSAD_B_SF ? "SF" : " ",\r |
| 689 | cData & MDSAD_B_IX ? "IX" : " ",\r |
| 690 | cData & MDSAD_B_DD ? "DD" : " ",\r |
| 691 | cData & MDSAD_B_MO ? "MO" : " ",\r |
| 692 | cData & MDSAD_B_WR ? "WR" : " ",\r |
| 693 | cData & MDSAD_B_SP ? "SP" : " ",\r |
| 694 | cData & MDSAD_B_WP ? "WP" : " ",\r |
| 695 | cData & MDSAD_B_T0 ? "T0" : " "));\r |
| 696 | break;\r |
| 697 | case MDSAD_C_STATUS: /* C-STATUS */\r |
| 698 | cData |= (mdsad_info->c_status.sc & 0xF);\r |
| 699 | TRACE_PRINT(STATUS_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 700 | " C-Status = <%s %s %s %s %i>" NLP, PCX,\r |
| 701 | cData & MDSAD_C_SF ? "SF" : " ",\r |
| 702 | cData & MDSAD_C_IX ? "IX" : " ",\r |
| 703 | cData & MDSAD_C_DD ? "DD" : " ",\r |
| 704 | cData & MDSAD_C_MO ? "MO" : " ", cData & MDSAD_C_SC));\r |
| 705 | break;\r |
| 706 | case MDSAD_READ_DATA: /* READ DATA */\r |
| 707 | {\r |
| 708 | unsigned int flags;\r |
| 709 | unsigned int readlen;\r |
| 710 | \r |
| 711 | if(mdsad_info->datacount == 0) {\r |
| 712 | TRACE_PRINT(RD_DATA_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 713 | " READ Start: Drive: %d, Track=%d, Head=%d, Sector=%d" NLP,\r |
| 714 | PCX,\r |
| 715 | mdsad_info->orders.ds,\r |
| 716 | pDrive->track,\r |
| 717 | mdsad_info->orders.ss,\r |
| 718 | pDrive->sector));\r |
| 719 | \r |
| 720 | checksum = 0;\r |
| 721 | \r |
| 722 | sec_offset = (pDrive->track * (MDSAD_SECTOR_LEN * MDSAD_SECTORS_PER_TRACK)) +\r |
| 723 | (mdsad_info->orders.ss * ((MDSAD_SECTOR_LEN * MDSAD_SECTORS_PER_TRACK) * MDSAD_TRACKS)) +\r |
| 724 | (pDrive->sector * MDSAD_SECTOR_LEN);\r |
| 725 | \r |
| 726 | if ((pDrive->uptr == NULL) ||\r |
| 727 | (pDrive->uptr->fileref == NULL)) {\r |
| 728 | TRACE_PRINT(RD_DATA_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 729 | " Drive: %d not attached - read ignored." NLP,\r |
| 730 | PCX, mdsad_info->orders.ds));\r |
| 731 | return 0xe5;\r |
| 732 | }\r |
| 733 | \r |
| 734 | switch((pDrive->uptr)->u3)\r |
| 735 | {\r |
| 736 | case IMAGE_TYPE_IMD:\r |
| 737 | if(pDrive->imd == NULL) {\r |
| 738 | printf(".imd is NULL!" NLP);\r |
| 739 | }\r |
| 740 | /* DBG_PRINT(("%s: Read: imd=%p" NLP, __FUNCTION__, mdsad_info->drive[mdsad_info->sel_drive].imd)); */\r |
| 741 | sectRead(pDrive->imd,\r |
| 742 | pDrive->track,\r |
| 743 | mdsad_info->orders.ss,\r |
| 744 | pDrive->sector,\r |
| 745 | sdata.u.data,\r |
| 746 | MDSAD_SECTOR_LEN,\r |
| 747 | &flags,\r |
| 748 | &readlen);\r |
| 749 | break;\r |
| 750 | case IMAGE_TYPE_DSK:\r |
| 751 | if(pDrive->uptr->fileref == NULL) {\r |
| 752 | printf(".fileref is NULL!" NLP);\r |
| 753 | } else {\r |
| 754 | fseek((pDrive->uptr)->fileref,\r |
| 755 | sec_offset, SEEK_SET);\r |
| 756 | fread(&sdata.u.data[0], MDSAD_SECTOR_LEN,\r |
| 757 | 1, (pDrive->uptr)->fileref);\r |
| 758 | }\r |
| 759 | break;\r |
| 760 | case IMAGE_TYPE_CPT:\r |
| 761 | printf("%s: CPT Format not supported"\r |
| 762 | NLP, __FUNCTION__);\r |
| 763 | break;\r |
| 764 | default:\r |
| 765 | printf("%s: Unknown image Format"\r |
| 766 | NLP, __FUNCTION__);\r |
| 767 | break;\r |
| 768 | }\r |
| 769 | if(trace_level & RD_DATA_DETAIL_MSG) showdata(TRUE);\r |
| 770 | }\r |
| 771 | \r |
| 772 | if(mdsad_info->datacount < 0x200) {\r |
| 773 | cData = sdata.u.data[mdsad_info->datacount];\r |
| 774 | \r |
| 775 | /* Exclusive OR */\r |
| 776 | checksum ^= cData;\r |
| 777 | /* Rotate Left Circular */\r |
| 778 | checksum = ((checksum << 1) | ((checksum & 0x80) != 0)) & 0xff;\r |
| 779 | \r |
| 780 | DBG_PRINT(("MDSAD: " ADDRESS_FORMAT\r |
| 781 | " READ-DATA[offset:%06x+%03x]=%02x" NLP,\r |
| 782 | PCX, sec_offset, mdsad_info->datacount, cData));\r |
| 783 | } else { /* checksum */\r |
| 784 | cData = checksum;\r |
| 785 | TRACE_PRINT(RD_DATA_MSG, ("MDSAD: " ADDRESS_FORMAT\r |
| 786 | " READ-DATA: Checksum is: 0x%02x" NLP,\r |
| 787 | PCX, cData));\r |
| 788 | }\r |
| 789 | \r |
| 790 | mdsad_info->datacount++;\r |
| 791 | break;\r |
| 792 | }\r |
| 793 | default:\r |
| 794 | DBG_PRINT(("MDSAD: " ADDRESS_FORMAT\r |
| 795 | " Invalid DM=%x" NLP, PCX, Addr & 0xF));\r |
| 796 | break;\r |
| 797 | }\r |
| 798 | \r |
| 799 | break;\r |
| 800 | }\r |
| 801 | return (cData);\r |
| 802 | }\r |