| /************************************************************************* | |
| * * | |
| * $Id: mfdc.c 1995 2008-07-15 03:59:13Z hharte $ * | |
| * * | |
| * Copyright (c) 2007-2008 Howard M. Harte. * | |
| * http://www.hartetec.com * | |
| * * | |
| * Permission is hereby granted, free of charge, to any person obtaining * | |
| * a copy of this software and associated documentation files (the * | |
| * "Software"), to deal in the Software without restriction, including * | |
| * without limitation the rights to use, copy, modify, merge, publish, * | |
| * distribute, sublicense, and/or sell copies of the Software, and to * | |
| * permit persons to whom the Software is furnished to do so, subject to * | |
| * the following conditions: * | |
| * * | |
| * The above copyright notice and this permission notice shall be * | |
| * included in all copies or substantial portions of the Software. * | |
| * * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * | |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * | |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * | |
| * NONINFRINGEMENT. IN NO EVENT SHALL HOWARD M. HARTE BE LIABLE FOR ANY * | |
| * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * | |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * | |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * | |
| * * | |
| * Except as contained in this notice, the name of Howard M. Harte shall * | |
| * not be used in advertising or otherwise to promote the sale, use or * | |
| * other dealings in this Software without prior written authorization * | |
| * Howard M. Harte. * | |
| * * | |
| * SIMH Interface based on altairz80_hdsk.c, by Peter Schorn. * | |
| * * | |
| * Module Description: * | |
| * Micropolis FD Control module for SIMH. * | |
| * See the "Vector Using MDOS Revision 8.4" manual at: * | |
| * www.hartetechnologies.com/manuals in the Vector Graphic section * | |
| * for details of the on-disk sector format and programming information. * | |
| * * | |
| * Environment: * | |
| * User mode only * | |
| * * | |
| *************************************************************************/ | |
| /*#define DBG_MSG */ | |
| #define USE_VGI /* Use 275-byte VGI-format sectors (includes all metadata) */ | |
| #include "altairz80_defs.h" | |
| #include "sim_imd.h" | |
| #if defined (_WIN32) | |
| #include <windows.h> | |
| #endif | |
| #ifdef DBG_MSG | |
| #define DBG_PRINT(args) sim_printf args | |
| #else | |
| #define DBG_PRINT(args) | |
| #endif | |
| /* Debug flags */ | |
| #define STATUS_MSG (1 << 0) | |
| #define SEEK_MSG (1 << 1) | |
| #define CMD_MSG (1 << 2) | |
| #define RD_DATA_MSG (1 << 3) | |
| #define WR_DATA_MSG (1 << 4) | |
| #define VERBOSE_MSG (1 << 5) | |
| extern uint32 PCX; | |
| extern t_stat set_membase(UNIT *uptr, int32 val, char *cptr, void *desc); | |
| extern t_stat show_membase(FILE *st, UNIT *uptr, int32 val, void *desc); | |
| extern uint32 sim_map_resource(uint32 baseaddr, uint32 size, uint32 resource_type, | |
| int32 (*routine)(const int32, const int32, const int32), uint8 unmap); | |
| extern int32 find_unit_index(UNIT *uptr); | |
| static void MFDC_Command(uint8 cData); | |
| #define MFDC_MAX_DRIVES 4 | |
| #define JUMPER_W9 1 /* Not Installed (0) = 2MHz, Installed (1) = 4MHz. */ | |
| #define JUMPER_W10 0 | |
| #define MFDC_SECTOR_LEN 275 | |
| typedef union { | |
| struct { | |
| uint8 sync; | |
| uint8 header[2]; | |
| uint8 unused[10]; | |
| uint8 data[256]; | |
| uint8 checksum; | |
| uint8 ecc[4]; | |
| uint8 ecc_valid; /* Not used for Micropolis FDC, but is used by FDHD. */ | |
| } u; | |
| uint8 raw[MFDC_SECTOR_LEN]; | |
| } SECTOR_FORMAT; | |
| typedef struct { | |
| UNIT *uptr; | |
| DISK_INFO *imd; | |
| uint8 track; | |
| uint8 wp; /* Disk write protected */ | |
| uint8 ready; /* Drive is ready */ | |
| uint8 sector; /* Current Sector number */ | |
| uint32 sector_wait_count; | |
| } MFDC_DRIVE_INFO; | |
| typedef struct { | |
| PNP_INFO pnp; /* Plug and Play */ | |
| uint8 xfr_flag; /* Indicates controller is ready to send/receive data */ | |
| uint8 sel_drive; /* Currently selected drive */ | |
| uint8 selected; /* 1 if drive is selected */ | |
| uint8 track0; /* Set it selected drive is on track 0 */ | |
| uint8 head; /* Currently selected head */ | |
| uint8 wr_latch; /* Write enable latch */ | |
| uint8 int_enable; /* Interrupt Enable */ | |
| uint32 datacount; /* Number of data bytes transferred from controller for current sector */ | |
| uint8 read_in_progress; /* TRUE if a read is in progress */ | |
| MFDC_DRIVE_INFO drive[MFDC_MAX_DRIVES]; | |
| } MFDC_INFO; | |
| static MFDC_INFO mfdc_info_data = { { 0xF800, 1024, 0, 0 } }; | |
| static MFDC_INFO *mfdc_info = &mfdc_info_data; | |
| static SECTOR_FORMAT sdata; | |
| #define UNIT_V_MFDC_WLK (UNIT_V_UF + 0) /* write locked */ | |
| #define UNIT_MFDC_WLK (1 << UNIT_V_MFDC_WLK) | |
| #define UNIT_V_MFDC_VERBOSE (UNIT_V_UF + 1) /* verbose mode, i.e. show error messages */ | |
| #define UNIT_MFDC_VERBOSE (1 << UNIT_V_MFDC_VERBOSE) | |
| #define MFDC_CAPACITY (77*16*MFDC_SECTOR_LEN) /* Default Micropolis Disk Capacity */ | |
| static t_stat mfdc_reset(DEVICE *mfdc_dev); | |
| static t_stat mfdc_attach(UNIT *uptr, char *cptr); | |
| static t_stat mfdc_detach(UNIT *uptr); | |
| static uint8 MFDC_Read(const uint32 Addr); | |
| static uint8 MFDC_Write(const uint32 Addr, uint8 cData); | |
| static int32 mdskdev(const int32 Addr, const int32 rw, const int32 data); | |
| static UNIT mfdc_unit[] = { | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MFDC_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MFDC_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MFDC_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, MFDC_CAPACITY) } | |
| }; | |
| static REG mfdc_reg[] = { | |
| { NULL } | |
| }; | |
| #define MDSK_NAME "Micropolis FD Control MDSK" | |
| static MTAB mfdc_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "MEMBASE", "MEMBASE", | |
| &set_membase, &show_membase, NULL, "Sets disk controller base address" }, | |
| { UNIT_MFDC_WLK, 0, "WRTENB", "WRTENB", | |
| NULL, NULL, NULL, "Enables " MDSK_NAME "n for writing" }, | |
| { UNIT_MFDC_WLK, UNIT_MFDC_WLK, "WRTLCK", "WRTLCK", | |
| NULL, NULL, NULL, "Locks " MDSK_NAME "n for writing" }, | |
| /* quiet, no warning messages */ | |
| { UNIT_MFDC_VERBOSE, 0, "QUIET", "QUIET", | |
| NULL, NULL, NULL, "No verbose messages for unit " MDSK_NAME "n" }, | |
| /* verbose, show warning messages */ | |
| { UNIT_MFDC_VERBOSE, UNIT_MFDC_VERBOSE, "VERBOSE", "VERBOSE", | |
| NULL, NULL, NULL, "Verbose messages for unit " MDSK_NAME "n" }, | |
| { 0 } | |
| }; | |
| /* Debug Flags */ | |
| static DEBTAB mfdc_dt[] = { | |
| { "STATUS", STATUS_MSG, "Status messages" }, | |
| { "SEEK", SEEK_MSG, "Seek activity" }, | |
| { "CMD", CMD_MSG, "Commands" }, | |
| { "READ", RD_DATA_MSG, "Disk read activity" }, | |
| { "WRITE", WR_DATA_MSG, "Disk write activity" }, | |
| { "VERBOSE", VERBOSE_MSG, "Verbose messages" }, | |
| { NULL, 0 } | |
| }; | |
| DEVICE mfdc_dev = { | |
| "MDSK", mfdc_unit, mfdc_reg, mfdc_mod, | |
| MFDC_MAX_DRIVES, 10, 31, 1, MFDC_MAX_DRIVES, MFDC_MAX_DRIVES, | |
| NULL, NULL, &mfdc_reset, | |
| NULL, &mfdc_attach, &mfdc_detach, | |
| &mfdc_info_data, (DEV_DISABLE | DEV_DIS | DEV_DEBUG), 0, | |
| mfdc_dt, NULL, MDSK_NAME | |
| }; | |
| /* Micropolis FD Control Boot ROM | |
| * This ROM code is runtime-relocatable. See Appendix F of the "Vector Using MDOS Revision 8.4" | |
| * manual at www.hartetechnologies.com/manuals in the Vector Graphic section. | |
| */ | |
| static uint8 mfdc_rom[256] = { | |
| 0xF3, 0x21, 0xA2, 0x00, 0xF9, 0x36, 0xC9, 0xCD, 0xA2, 0x00, 0xEB, 0x2A, 0xA0, 0x00, 0x2E, 0x00, /* 0x00 */ | |
| 0xE5, 0x01, 0x1D, 0x00, 0x09, 0xE5, 0xE1, 0x0E, 0x1A, 0x09, 0x06, 0xBD, 0xEB, 0x3B, 0x3B, 0x1A, /* 0x10 */ | |
| 0x77, 0xBE, 0xC0, 0x23, 0x13, 0x05, 0xC0, 0xE1, 0x2A, 0xA0, 0x00, 0x11, 0x00, 0x02, 0x19, 0x22, /* 0x20 */ | |
| 0xA2, 0x00, 0x36, 0xA0, 0xC3, 0xD4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2A, 0xA2, 0x00, 0x7E, 0xE6, /* 0x30 */ | |
| 0x80, 0xCA, 0xA9, 0x00, 0x7E, 0xE6, 0x0F, 0xA8, 0xC2, 0xA9, 0x00, 0x23, 0xB6, 0xF2, 0xB7, 0x00, /* 0x40 */ | |
| 0x23, 0x7E, 0xAF, 0xEB, 0x06, 0x00, 0x00, 0x00, 0x1A, 0x77, 0x23, 0x88, 0x47, 0x1A, 0x77, 0x23, /* 0x50 */ | |
| 0x88, 0x47, 0x0D, 0xC2, 0xC3, 0x00, 0x1A, 0xB8, 0xC9, 0x2A, 0xA2, 0x00, 0x36, 0x20, 0x23, 0x7E, /* 0x60 */ | |
| 0x2B, 0xE6, 0x24, 0xEE, 0x20, 0xC2, 0xD4, 0x00, 0x0E, 0x5E, 0xCD, 0x49, 0x01, 0x23, 0x7E, 0x2B, /* 0x70 */ | |
| 0xE6, 0x24, 0xEE, 0x20, 0xC2, 0xD4, 0x00, 0x23, 0x7E, 0xE6, 0x08, 0x2B, 0xCA, 0x07, 0x01, 0x06, /* 0x80 */ | |
| 0x08, 0x36, 0x61, 0x0E, 0x0F, 0xCD, 0x49, 0x01, 0x05, 0xC2, 0xFC, 0x00, 0x23, 0x7E, 0xE6, 0x08, /* 0x90 */ | |
| 0x2B, 0xC2, 0x19, 0x01, 0x36, 0x60, 0x0E, 0x0F, 0xCD, 0x49, 0x01, 0xC3, 0x07, 0x01, 0x21, 0x5F, /* 0xA0 */ | |
| 0x01, 0xCD, 0x37, 0x01, 0xC2, 0xD4, 0x00, 0x2A, 0x69, 0x02, 0x22, 0xA4, 0x00, 0xCD, 0x37, 0x01, /* 0xB0 */ | |
| 0xC2, 0xD4, 0x00, 0x2A, 0xA4, 0x00, 0x11, 0x0C, 0x00, 0x19, 0xD1, 0xE9, 0xE5, 0xEB, 0x01, 0x86, /* 0xC0 */ | |
| 0x00, 0xCD, 0xA6, 0x00, 0xE1, 0xC2, 0x37, 0x01, 0xE5, 0x7E, 0x23, 0xB6, 0xE1, 0xC9, 0x7E, 0xE6, /* 0xD0 */ | |
| 0x20, 0x79, 0xC2, 0x51, 0x01, 0x07, 0x4F, 0x3E, 0xFF, 0xD6, 0x01, 0xB7, 0xC2, 0x54, 0x01, 0x0D, /* 0xE0 */ | |
| 0xC2, 0x52, 0x01, 0xC9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC3, 0xA6, 0x00 /* 0xF0 */ | |
| }; | |
| /* Reset routine */ | |
| static t_stat mfdc_reset(DEVICE *dptr) | |
| { | |
| uint8 i; | |
| PNP_INFO *pnp = (PNP_INFO *)dptr->ctxt; | |
| if(dptr->flags & DEV_DIS) { | |
| sim_map_resource(pnp->mem_base, pnp->mem_size, RESOURCE_TYPE_MEMORY, &mdskdev, TRUE); | |
| } else { | |
| /* Connect MFDC at base address */ | |
| for(i = 0; i < MFDC_MAX_DRIVES; i++) { | |
| mfdc_info->drive[i].uptr = &mfdc_dev.units[i]; | |
| } | |
| if(sim_map_resource(pnp->mem_base, pnp->mem_size, RESOURCE_TYPE_MEMORY, &mdskdev, FALSE) != 0) { | |
| sim_printf("%s: error mapping resource at 0x%04x\n", __FUNCTION__, pnp->mem_base); | |
| dptr->flags |= DEV_DIS; | |
| return SCPE_ARG; | |
| } | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Attach routine */ | |
| static t_stat mfdc_attach(UNIT *uptr, char *cptr) | |
| { | |
| t_stat r; | |
| unsigned int i = 0; | |
| r = attach_unit(uptr, cptr); /* attach unit */ | |
| if ( r != SCPE_OK) /* error? */ | |
| return r; | |
| /* Determine length of this disk */ | |
| if(sim_fsize(uptr->fileref) != 0) { | |
| uptr->capac = sim_fsize(uptr->fileref); | |
| } else { | |
| uptr->capac = MFDC_CAPACITY; | |
| } | |
| i = find_unit_index(uptr); | |
| /* Default for new file is DSK */ | |
| uptr->u3 = IMAGE_TYPE_DSK; | |
| if(uptr->capac > 0) { | |
| r = assignDiskType(uptr); | |
| if (r != SCPE_OK) { | |
| mfdc_detach(uptr); | |
| return r; | |
| } | |
| } | |
| if (uptr->flags & UNIT_MFDC_VERBOSE) | |
| sim_printf("MDSK%d, attached to '%s', type=%s, len=%d\n", i, cptr, | |
| uptr->u3 == IMAGE_TYPE_IMD ? "IMD" : uptr->u3 == IMAGE_TYPE_CPT ? "CPT" : "DSK", | |
| uptr->capac); | |
| if(uptr->u3 == IMAGE_TYPE_IMD) { | |
| if(uptr->capac < 318000) { | |
| sim_printf("Cannot create IMD files with SIMH.\nCopy an existing file and format it with CP/M.\n"); | |
| mfdc_detach(uptr); | |
| return SCPE_OPENERR; | |
| } | |
| if (uptr->flags & UNIT_MFDC_VERBOSE) | |
| sim_printf("--------------------------------------------------------\n"); | |
| mfdc_info->drive[i].imd = diskOpenEx((uptr->fileref), (uptr->flags & UNIT_MFDC_VERBOSE), | |
| &mfdc_dev, VERBOSE_MSG, VERBOSE_MSG); | |
| if (uptr->flags & UNIT_MFDC_VERBOSE) | |
| sim_printf("\n"); | |
| } else { | |
| mfdc_info->drive[i].imd = NULL; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Detach routine */ | |
| static t_stat mfdc_detach(UNIT *uptr) | |
| { | |
| t_stat r; | |
| int8 i; | |
| for(i = 0; i < MFDC_MAX_DRIVES; i++) { | |
| if(mfdc_dev.units[i].fileref == uptr->fileref) { | |
| break; | |
| } | |
| } | |
| if (i >= MFDC_MAX_DRIVES) | |
| return SCPE_ARG; | |
| DBG_PRINT(("Detach MFDC%d\n", i)); | |
| r = diskClose(&mfdc_info->drive[i].imd); | |
| if (r != SCPE_OK) | |
| return r; | |
| r = detach_unit(uptr); /* detach unit */ | |
| if (r != SCPE_OK) | |
| return r; | |
| return SCPE_OK; | |
| } | |
| static uint8 cy; | |
| static uint8 adc(uint8 sum, uint8 a1) | |
| { | |
| uint32 total; | |
| total = sum + a1 + cy; | |
| if(total > 0xFF) { | |
| cy = 1; | |
| } else { | |
| cy = 0; | |
| } | |
| return(total & 0xFF); | |
| } | |
| /* Main Entry Point for Memory-Mapped I/O to the Micropolis FD Control Board | |
| * | |
| * The controller is typically located at 0xF800 in the Memory Map, and occupies | |
| * 1K of address space. Accesses are broken down as follows: | |
| * | |
| * 0xF800-0xF8FF: Bootstrap ROM | |
| * 0xF900-0xF9FF: Nothing (reads 0xFF) | |
| * 0xFA00-0xFBFF: Controller registers: there are four registers, which are shadowed | |
| * throughout this 512-byte range. | |
| * | |
| * The controller can be relocated on any 1K boundary in the memory map, and since the | |
| * boot ROM code is runtime relocatable, it moves with the controller registers. | |
| */ | |
| static int32 mdskdev(const int32 Addr, const int32 rw, const int32 data) | |
| { | |
| switch(Addr & 0x300) { | |
| case 0x000: /* Boot ROM */ | |
| if(rw == 0) { /* Read boot ROM */ | |
| return(mfdc_rom[Addr & 0xFF]); | |
| } else { | |
| sim_printf("MFDC: Attempt to write to boot ROM." NLP); | |
| return (-1); | |
| } | |
| break; | |
| case 0x100: /* Nothing */ | |
| return(0xFF); | |
| break; | |
| case 0x200: | |
| case 0x300: /* Controller Registers */ | |
| if(rw == 0) { /* Read Register */ | |
| return(MFDC_Read(Addr)); | |
| } else { /* Write Register */ | |
| return(MFDC_Write(Addr, data)); | |
| } | |
| break; | |
| } | |
| return(-1); | |
| } | |
| static uint8 MFDC_Read(const uint32 Addr) | |
| { | |
| uint8 cData; | |
| MFDC_DRIVE_INFO *pDrive; | |
| int32 rtn; | |
| cData = 0x00; | |
| pDrive = &mfdc_info->drive[mfdc_info->sel_drive]; | |
| switch(Addr & 0x3) { | |
| case 0: | |
| if(mfdc_info->read_in_progress == FALSE) { | |
| pDrive->sector_wait_count++; | |
| if(pDrive->sector_wait_count > 10) { | |
| pDrive->sector++; | |
| pDrive->sector &= 0x0F; /* Max of 16 sectors */ | |
| mfdc_info->wr_latch = 0; /* on new sector, disable the write latch */ | |
| DBG_PRINT(("Head over sector %d" NLP, pDrive->sector)); | |
| pDrive->sector_wait_count = 0; | |
| } | |
| } | |
| cData = (pDrive->sector) & 0xF; /* [3:0] current sector */ | |
| cData |= (JUMPER_W10 << 4); | |
| cData |= ((~JUMPER_W9) & 1) << 5; | |
| cData |= (0 << 6); /* Sector Interrupt Flag, reset by RESET command or Interrupt Disable */ | |
| cData |= (1 << 7); /* Sector Flag */ | |
| mfdc_info->xfr_flag = 1; /* Drive has data */ | |
| mfdc_info->datacount = 0; | |
| sim_debug(STATUS_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " RD Sector Register = 0x%02x\n", PCX, cData); | |
| break; | |
| case 1: | |
| cData = (mfdc_info->sel_drive & 0x3); /* [1:0] selected drive */ | |
| cData |= (!mfdc_info->selected << 2); /* [2] drive is selected */ | |
| cData |= (pDrive->track == 0) ? 0x08 : 0; /* [3] TK0 */ | |
| pDrive->wp = ((pDrive->uptr)->flags & UNIT_MFDC_WLK) ? 1 : 0; | |
| cData |= (pDrive->wp << 4); /* [4] Write Protect */ | |
| cData |= (pDrive->ready << 5); /* [5] Drive Ready */ | |
| cData |= (0 << 6); /* [6] PINTE from S-100 Bus */ | |
| cData |= (mfdc_info->xfr_flag << 7); /* [7] Transfer Flag */ | |
| sim_debug(STATUS_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " RD Status = 0x%02x\n", PCX, cData); | |
| break; | |
| case 2: | |
| case 3: | |
| if(mfdc_info->datacount == 0) { | |
| unsigned int i, checksum; | |
| unsigned long sec_offset; | |
| uint32 flags; | |
| uint32 readlen; | |
| /* Clear out unused portion of sector. */ | |
| memset(&sdata.u.unused[0], 0x00, 10); | |
| sdata.u.sync = 0xFF; | |
| sdata.u.header[0] = pDrive->track; | |
| sdata.u.header[1] = pDrive->sector; | |
| sim_debug(RD_DATA_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " RD Data T:%d S:[%d]\n", PCX, pDrive->track, pDrive->sector); | |
| #ifdef USE_VGI | |
| sec_offset = (pDrive->track * MFDC_SECTOR_LEN * 16) + \ | |
| (pDrive->sector * MFDC_SECTOR_LEN); | |
| #else | |
| sec_offset = (pDrive->track * 4096) + \ | |
| (pDrive->sector * 256); | |
| #endif /* USE_VGI */ | |
| if (!(pDrive->uptr->flags & UNIT_ATT)) { | |
| if (pDrive->uptr->flags & UNIT_MFDC_VERBOSE) | |
| sim_printf("MFDC: " ADDRESS_FORMAT " MDSK%i not attached." NLP, PCX, | |
| mfdc_info->sel_drive); | |
| return 0x00; | |
| } | |
| switch((pDrive->uptr)->u3) | |
| { | |
| case IMAGE_TYPE_IMD: | |
| if(pDrive->imd == NULL) { | |
| sim_printf(".imd is NULL!" NLP); | |
| } | |
| /* sim_printf("%s: Read: imd=%p" NLP, __FUNCTION__, pDrive->imd); */ | |
| sectRead(pDrive->imd, | |
| pDrive->track, | |
| mfdc_info->head, | |
| pDrive->sector, | |
| sdata.u.data, | |
| 256, | |
| &flags, | |
| &readlen); | |
| break; | |
| case IMAGE_TYPE_DSK: | |
| if(pDrive->uptr->fileref == NULL) { | |
| sim_printf(".fileref is NULL!" NLP); | |
| } else { | |
| sim_fseek((pDrive->uptr)->fileref, sec_offset, SEEK_SET); | |
| #ifdef USE_VGI | |
| rtn = sim_fread(sdata.raw, 1, MFDC_SECTOR_LEN, (pDrive->uptr)->fileref); | |
| if (rtn != MFDC_SECTOR_LEN) | |
| #else | |
| rtn = sim_fread(sdata.u.data, 1, 256, (pDrive->uptr)->fileref); | |
| if (rtn != 256) | |
| #endif /* USE_VGI */ | |
| sim_printf("%s: sim_fread error. Result = %d." NLP, __FUNCTION__, rtn); | |
| } | |
| break; | |
| case IMAGE_TYPE_CPT: | |
| sim_printf("%s: CPT Format not supported" NLP, __FUNCTION__); | |
| break; | |
| default: | |
| sim_printf("%s: Unknown image Format" NLP, __FUNCTION__); | |
| break; | |
| } | |
| /* sim_printf("%d/%d @%04x Len=%04x" NLP, sdata.u.header[0], sdata.u.header[1], sdata.u.header[9]<<8|sdata.u.header[8], sdata.u.header[11]<<8|sdata.u.header[10]); */ | |
| adc(0,0); /* clear Carry bit */ | |
| checksum = 0; | |
| /* Checksum everything except the sync byte */ | |
| for(i=1;i<269;i++) { | |
| checksum = adc(checksum, sdata.raw[i]); | |
| } | |
| #ifndef USE_VGI | |
| /* VGI has the checksum in the data read from the disk image, | |
| * so inserting the computed version of the checksum is not | |
| * necessary. MZOS computes the checksum differently than all | |
| * other VG software, so this allows MZOS disks to work | |
| */ | |
| sdata.u.checksum = checksum & 0xFF; | |
| #endif | |
| /* DBG_PRINT(("Checksum=%x" NLP, sdata.u.checksum)); */ | |
| mfdc_info->read_in_progress = TRUE; | |
| } | |
| cData = sdata.raw[mfdc_info->datacount]; | |
| mfdc_info->datacount++; | |
| if(mfdc_info->datacount == 270) { | |
| sim_debug(RD_DATA_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " Read sector [%d] complete\n", PCX, pDrive->sector); | |
| mfdc_info->read_in_progress = FALSE; | |
| } | |
| /* DBG_PRINT(("MFDC: " ADDRESS_FORMAT " RD Data Sector %d[%03d]: 0x%02x" NLP, PCX, pDrive->sector, mfdc_info->datacount, cData)); */ | |
| break; | |
| } | |
| return (cData); | |
| } | |
| static uint8 MFDC_Write(const uint32 Addr, uint8 cData) | |
| { | |
| unsigned int sec_offset; | |
| uint32 flags = 0; | |
| uint32 writelen; | |
| MFDC_DRIVE_INFO *pDrive; | |
| pDrive = &mfdc_info->drive[mfdc_info->sel_drive]; | |
| switch(Addr & 0x3) { | |
| case 0: | |
| case 1: | |
| MFDC_Command(cData); | |
| break; | |
| case 2: | |
| case 3: | |
| /* DBG_PRINT(("MFDC: " ADDRESS_FORMAT " WR Data" NLP, PCX)); */ | |
| if(mfdc_info->wr_latch == 0) { | |
| sim_printf("MFDC: " ADDRESS_FORMAT " Error, attempt to write data when write latch is not set." NLP, PCX); | |
| } else { | |
| #ifdef USE_VGI | |
| sec_offset = (pDrive->track * MFDC_SECTOR_LEN * 16) + \ | |
| (pDrive->sector * MFDC_SECTOR_LEN); | |
| sdata.raw[mfdc_info->datacount] = cData; | |
| #else | |
| int data_index = mfdc_info->datacount - 13; | |
| sec_offset = (pDrive->track * 4096) + \ | |
| (pDrive->sector * 256); | |
| if((data_index >= 0) && (data_index < 256)) { | |
| DBG_PRINT(("writing data [%03d]=%02x" NLP, data_index, cData)); | |
| sdata.u.data[data_index] = cData; | |
| } | |
| #endif /* USE_VGI */ | |
| mfdc_info->datacount ++; | |
| if(mfdc_info->datacount == 270) { | |
| sim_debug(WR_DATA_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " WR Data T:%d S:[%d]\n", PCX, pDrive->track, pDrive->sector); | |
| if (!(pDrive->uptr->flags & UNIT_ATT)) { | |
| if (pDrive->uptr->flags & UNIT_MFDC_VERBOSE) | |
| sim_printf("MFDC: " ADDRESS_FORMAT " MDSK%i not attached." NLP, PCX, | |
| mfdc_info->sel_drive); | |
| return 0x00; | |
| } | |
| switch((pDrive->uptr)->u3) | |
| { | |
| case IMAGE_TYPE_IMD: | |
| if(pDrive->imd == NULL) { | |
| sim_printf(".imd is NULL!" NLP); | |
| } | |
| sectWrite(pDrive->imd, | |
| pDrive->track, | |
| mfdc_info->head, | |
| pDrive->sector, | |
| sdata.u.data, | |
| 256, | |
| &flags, | |
| &writelen); | |
| break; | |
| case IMAGE_TYPE_DSK: | |
| if(pDrive->uptr->fileref == NULL) { | |
| sim_printf(".fileref is NULL!" NLP); | |
| } else { | |
| sim_fseek((pDrive->uptr)->fileref, sec_offset, SEEK_SET); | |
| #ifdef USE_VGI | |
| sim_fwrite(sdata.raw, 1, MFDC_SECTOR_LEN, (pDrive->uptr)->fileref); | |
| #else | |
| sim_fwrite(sdata.u.data, 1, 256, (pDrive->uptr)->fileref); | |
| #endif /* USE_VGI */ | |
| } | |
| break; | |
| case IMAGE_TYPE_CPT: | |
| sim_printf("%s: CPT Format not supported" NLP, __FUNCTION__); | |
| break; | |
| default: | |
| sim_printf("%s: Unknown image Format" NLP, __FUNCTION__); | |
| break; | |
| } | |
| } | |
| } | |
| break; | |
| } | |
| cData = 0x00; | |
| return (cData); | |
| } | |
| #define MFDC_CMD_NOP 0 | |
| #define MFDC_CMD_SELECT 1 | |
| #define MFDC_CMD_INTR 2 | |
| #define MFDC_CMD_STEP 3 | |
| #define MFDC_CMD_SET_WRITE 4 | |
| #define MFDC_CMD_RESET 5 | |
| static void MFDC_Command(uint8 cData) | |
| { | |
| uint8 cCommand; | |
| uint8 cModifier; | |
| MFDC_DRIVE_INFO *pDrive; | |
| pDrive = &mfdc_info->drive[mfdc_info->sel_drive]; | |
| cCommand = cData >> 5; | |
| cModifier = cData & 0x1F; | |
| switch(cCommand) { | |
| case MFDC_CMD_NOP: | |
| sim_debug(CMD_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " No Op.\n", PCX); | |
| break; | |
| case MFDC_CMD_SELECT: | |
| mfdc_info->sel_drive = cModifier & 0x03; | |
| mfdc_info->head = (cModifier & 0x10) >> 4; | |
| mfdc_info->selected = TRUE; | |
| if(pDrive->uptr->fileref != NULL) { | |
| pDrive->ready = 1; | |
| } else { | |
| pDrive->ready = 0; | |
| } | |
| sim_debug(CMD_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " Select Drive: %d, Head: %s\n", PCX, mfdc_info->sel_drive, (mfdc_info->head) ? "Upper" : "Lower"); | |
| break; | |
| case MFDC_CMD_INTR: | |
| mfdc_info->int_enable = cModifier & 1; /* 0=int disable, 1=enable */ | |
| sim_debug(CMD_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " Interrupts %s.\n", PCX, mfdc_info->int_enable ? "Enabled" : "Disabled"); | |
| break; | |
| case MFDC_CMD_STEP: | |
| if(cModifier & 1) { /* Step IN */ | |
| pDrive->track++; | |
| } | |
| else { /* Step OUT */ | |
| if(pDrive->track != 0) { | |
| pDrive->track--; | |
| } | |
| } | |
| sim_debug(SEEK_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " Step %s, Track=%d.\n", PCX, (cModifier & 1) ? "IN" : "OUT", pDrive->track); | |
| break; | |
| case MFDC_CMD_SET_WRITE: | |
| sim_debug(CMD_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " Set WRITE.\n", PCX); | |
| mfdc_info->wr_latch = 1; /* Allow writes for the current sector */ | |
| mfdc_info->datacount = 0; /* reset the byte counter */ | |
| break; | |
| case MFDC_CMD_RESET: | |
| sim_debug(CMD_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " Reset Controller.\n", PCX); | |
| mfdc_info->selected = 0; /* de-select the drive */ | |
| mfdc_info->wr_latch = 0; /* Disable the write latch */ | |
| mfdc_info->datacount = 0; /* reset the byte counter */ | |
| break; | |
| default: | |
| sim_debug(CMD_MSG, &mfdc_dev, "MFDC: " ADDRESS_FORMAT " Unsupported command.\n", PCX); | |
| break; | |
| } | |
| } |