| /************************************************************************* | |
| * * | |
| * $Id: n8vem.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: * | |
| * N8VEM Single-Board Computer I/O module for SIMH. * | |
| * http://groups.google.com/group/n8vem/web/n8vem-single-board-computer-home-page * | |
| * * | |
| * Environment: * | |
| * User mode only * | |
| * * | |
| *************************************************************************/ | |
| /* #define DBG_MSG */ | |
| #include "altairz80_defs.h" | |
| #if defined (_WIN32) | |
| #include <windows.h> | |
| #endif | |
| #ifdef DBG_MSG | |
| #define DBG_PRINT(args) printf args | |
| #else | |
| #define DBG_PRINT(args) | |
| #endif | |
| /* Debug flags */ | |
| #define ERROR_MSG (1 << 0) | |
| #define PIO_MSG (1 << 1) | |
| #define UART_MSG (1 << 2) | |
| #define RTC_MSG (1 << 3) | |
| #define MPCL_MSG (1 << 4) | |
| #define ROM_MSG (1 << 5) | |
| #define VERBOSE_MSG (1 << 7) | |
| #define N8VEM_MAX_DRIVES 2 | |
| typedef struct { | |
| PNP_INFO pnp; /* Plug and Play */ | |
| uint8 *ram; | |
| uint8 *rom; | |
| uint8 rom_attached; | |
| uint8 uart_scr; | |
| uint8 uart_lcr; | |
| uint8 mpcl_ram; | |
| uint8 mpcl_rom; | |
| } N8VEM_INFO; | |
| static N8VEM_INFO n8vem_info_data = { { 0x0, 0x8000, 0x60, 32 } }; | |
| static N8VEM_INFO *n8vem_info = &n8vem_info_data; | |
| 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 t_stat set_iobase(UNIT *uptr, int32 val, char *cptr, void *desc); | |
| extern t_stat show_iobase(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 uint32 PCX; | |
| extern REG *sim_PC; | |
| extern int32 find_unit_index (UNIT *uptr); | |
| static t_stat n8vem_reset(DEVICE *n8vem_dev); | |
| static t_stat n8vem_boot(int32 unitno, DEVICE *dptr); | |
| static t_stat n8vem_attach(UNIT *uptr, char *cptr); | |
| static t_stat n8vem_detach(UNIT *uptr); | |
| static uint8 N8VEM_Read(const uint32 Addr); | |
| static uint8 N8VEM_Write(const uint32 Addr, uint8 cData); | |
| static int32 n8vemdev(const int32 port, const int32 io, const int32 data); | |
| static int32 n8vem_mem(const int32 port, const int32 io, const int32 data); | |
| static int32 save_rom = 0x00; /* When set to 1, saves ROM back to file on disk at detach time */ | |
| static int32 save_ram = 0x00; /* When set to 1, saves RAM back to file on disk at detach time */ | |
| static int32 n8vem_pio1a = 0x00; /* 8255 PIO1A IN Port */ | |
| static int32 n8vem_pio1b = 0x00; /* 8255 PIO1B OUT Port */ | |
| static int32 n8vem_pio1c = 0x00; /* 8255 PIO1C IN Port */ | |
| static int32 n8vem_pio1ctrl = 0x00; /* 8255 PIO1 Control Port */ | |
| #define N8VEM_ROM_SIZE (1024 * 1024) | |
| #define N8VEM_RAM_SIZE (512 * 1024) | |
| #define N8VEM_RAM_SELECT (1 << 7) | |
| #define N8VEM_RAM_MASK 0x0F | |
| #define N8VEM_ROM_MASK 0x1F | |
| #define N8VEM_ADDR_MASK 0x7FFF | |
| static UNIT n8vem_unit[] = { | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, N8VEM_ROM_SIZE) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, N8VEM_RAM_SIZE) } | |
| }; | |
| static REG n8vem_reg[] = { | |
| { HRDATA (SAVEROM, save_rom, 1), }, | |
| { HRDATA (SAVERAM, save_ram, 1), }, | |
| { HRDATA (PIO1A, n8vem_pio1a, 8), }, | |
| { HRDATA (PIO1B, n8vem_pio1b, 8), }, | |
| { HRDATA (PIO1C, n8vem_pio1c, 8), }, | |
| { HRDATA (PIO1CTRL, n8vem_pio1ctrl, 8), }, | |
| { NULL } | |
| }; | |
| static MTAB n8vem_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "MEMBASE", "MEMBASE", &set_membase, &show_membase, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "IOBASE", "IOBASE", &set_iobase, &show_iobase, NULL }, | |
| { 0 } | |
| }; | |
| /* Debug Flags */ | |
| static DEBTAB n8vem_dt[] = { | |
| { "ERROR", ERROR_MSG }, | |
| { "PIO", PIO_MSG }, | |
| { "UART", UART_MSG }, | |
| { "RTC", RTC_MSG }, | |
| { "ROM", ROM_MSG }, | |
| { "VERBOSE",VERBOSE_MSG }, | |
| { NULL, 0 } | |
| }; | |
| DEVICE n8vem_dev = { | |
| "N8VEM", n8vem_unit, n8vem_reg, n8vem_mod, | |
| N8VEM_MAX_DRIVES, 10, 31, 1, N8VEM_MAX_DRIVES, N8VEM_MAX_DRIVES, | |
| NULL, NULL, &n8vem_reset, | |
| &n8vem_boot, &n8vem_attach, &n8vem_detach, | |
| &n8vem_info_data, (DEV_DISABLE | DEV_DIS | DEV_DEBUG), ERROR_MSG, | |
| n8vem_dt, NULL, "Single-Board Computer N8VEM" | |
| }; | |
| /* Reset routine */ | |
| static t_stat n8vem_reset(DEVICE *dptr) | |
| { | |
| PNP_INFO *pnp = (PNP_INFO *)dptr->ctxt; | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Reset.\n"); | |
| if(dptr->flags & DEV_DIS) { /* Disconnect I/O Ports */ | |
| sim_map_resource(pnp->io_base, pnp->io_size, RESOURCE_TYPE_IO, &n8vemdev, TRUE); | |
| sim_map_resource(pnp->mem_base, pnp->mem_size, RESOURCE_TYPE_MEMORY, &n8vem_mem, TRUE); | |
| free(n8vem_info->ram); | |
| free(n8vem_info->rom); | |
| } else { | |
| /* Connect N8VEM at base address */ | |
| if(sim_map_resource(pnp->io_base, pnp->io_size, RESOURCE_TYPE_IO, &n8vemdev, FALSE) != 0) { | |
| printf("%s: error mapping I/O resource at 0x%04x\n", __FUNCTION__, pnp->io_base); | |
| return SCPE_ARG; | |
| } | |
| /* Connect N8VEM Memory (512K RAM, 1MB FLASH) */ | |
| if(sim_map_resource(pnp->mem_base, pnp->mem_size, RESOURCE_TYPE_MEMORY, &n8vem_mem, FALSE) != 0) { | |
| printf("%s: error mapping MEM resource at 0x%04x\n", __FUNCTION__, pnp->mem_base); | |
| return SCPE_ARG; | |
| } | |
| n8vem_info->ram = calloc(1, (N8VEM_RAM_SIZE)); | |
| n8vem_info->rom = calloc(1, (N8VEM_ROM_SIZE)); | |
| /* Clear the RAM and ROM mapping registers */ | |
| n8vem_info->mpcl_ram = 0; | |
| n8vem_info->mpcl_rom = 0; | |
| } | |
| return SCPE_OK; | |
| } | |
| static t_stat n8vem_boot(int32 unitno, DEVICE *dptr) | |
| { | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Boot.\n"); | |
| /* Clear the RAM and ROM mapping registers */ | |
| n8vem_info->mpcl_ram = 0; | |
| n8vem_info->mpcl_rom = 0; | |
| /* Set the PC to 0, and go. */ | |
| *((int32 *) sim_PC->loc) = 0; | |
| return SCPE_OK; | |
| } | |
| /* Attach routine */ | |
| static t_stat n8vem_attach(UNIT *uptr, char *cptr) | |
| { | |
| t_stat r; | |
| int32 i = 0, rtn; | |
| i = find_unit_index(uptr); | |
| if (i == -1) { | |
| return (SCPE_IERR); | |
| } | |
| r = attach_unit(uptr, cptr); /* attach unit */ | |
| if ( r != SCPE_OK) /* error? */ | |
| return r; | |
| /* Determine length of this disk */ | |
| uptr->capac = sim_fsize(uptr->fileref); | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Attach %s.\n", i == 0 ? "ROM" : "RAM"); | |
| if(i == 0) { /* Attaching ROM */ | |
| n8vem_info->rom_attached = TRUE; | |
| /* Erase ROM */ | |
| memset(n8vem_info->rom, 0xFF, N8VEM_ROM_SIZE); | |
| if(uptr->capac > 0) { | |
| /* Only read in enough of the file to fill the ROM. */ | |
| if (uptr->capac > N8VEM_ROM_SIZE) | |
| uptr->capac = N8VEM_ROM_SIZE; | |
| rtn = fread((void *)(n8vem_info->rom), uptr->capac, 1, uptr->fileref); | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Reading %d bytes into ROM." " Result = %ssuccessful.\n", uptr->capac, rtn == 1 ? "" : "not "); | |
| } | |
| } else { /* attaching RAM */ | |
| /* Erase RAM */ | |
| memset(n8vem_info->ram, 0x00, N8VEM_RAM_SIZE); | |
| if(uptr->capac > 0) { | |
| /* Only read in enough of the file to fill the RAM. */ | |
| if(uptr->capac > N8VEM_RAM_SIZE) | |
| uptr->capac = N8VEM_RAM_SIZE; | |
| rtn = fread((void *)(n8vem_info->ram), uptr->capac, 1, uptr->fileref); | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Reading %d bytes into RAM." " Result = %ssuccessful.\n", uptr->capac, rtn == 1 ? "" : "not "); | |
| } | |
| } | |
| return r; | |
| } | |
| /* Detach routine */ | |
| static t_stat n8vem_detach(UNIT *uptr) | |
| { | |
| t_stat r; | |
| int32 i = 0; | |
| i = find_unit_index(uptr); | |
| if (i == -1) { | |
| return (SCPE_IERR); | |
| } | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Detach %s.\n", i == 0 ? "ROM" : "RAM"); | |
| /* rewind to the beginning of the file. */ | |
| sim_fseek(uptr->fileref, 0, SEEK_SET); | |
| if(i == 0) { /* ROM */ | |
| /* Save the ROM back to disk if SAVEROM is set. */ | |
| if(save_rom == 1) { | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Writing %d bytes into ROM image.\n", N8VEM_ROM_SIZE); | |
| fwrite((void *)(n8vem_info->rom), N8VEM_ROM_SIZE, 1, uptr->fileref); | |
| } | |
| } else { /* RAM */ | |
| /* Save the RAM back to disk if SAVERAM is set. */ | |
| if(save_ram == 1) { | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: Writing %d bytes into RAM image.\n", N8VEM_RAM_SIZE); | |
| fwrite((void *)(n8vem_info->ram), N8VEM_RAM_SIZE, 1, uptr->fileref); | |
| } | |
| } | |
| r = detach_unit(uptr); /* detach unit */ | |
| return r; | |
| } | |
| /* RAM MEMORY PAGE CONFIGURATION LATCH CONTROL PORT ( IO_Y3 ) INFORMATION | |
| * | |
| * 7 6 5 4 3 2 1 0 ONLY APPLICABLE TO THE LOWER MEMORY PAGE $0000-$7FFF | |
| * ^ ^ ^ ^ ^ ^ ^ ^ | |
| * : : : : : : : :--0 = A15 RAM ADDRESS LINE DEFAULT IS 0 | |
| * : : : : : : :----0 = A16 RAM ADDRESS LINE DEFAULT IS 0 | |
| * : : : : : :------0 = A17 RAM ADDRESS LINE DEFAULT IS 0 | |
| * : : : : :--------0 = A18 RAM ADDRESS LINE DEFAULT IS 0 | |
| * : : : :-----------0 = | |
| * : : :-------------0 = | |
| * : :---------------0 = | |
| * :-----------------0 = | |
| * | |
| * ROM MEMORY PAGE CONFIGURATION LATCH CONTROL PORT ( IO_Y3+$04 ) INFORMATION | |
| * | |
| * 7 6 5 4 3 2 1 0 ONLY APPLICABLE TO THE LOWER MEMORY PAGE $0000-$7FFF | |
| * ^ ^ ^ ^ ^ ^ ^ ^ | |
| * : : : : : : : :--0 = A15 ROM ADDRESS LINE DEFAULT IS 0 | |
| * : : : : : : :----0 = A16 ROM ADDRESS LINE DEFAULT IS 0 | |
| * : : : : : :------0 = A17 ROM ADDRESS LINE DEFAULT IS 0 | |
| * : : : : :--------0 = A18 ROM ADDRESS LINE DEFAULT IS 0 | |
| * : : : :-----------0 = A19 ROM ONLY ADDRESS LINE DEFAULT IS 0 | |
| * : : :-------------0 = | |
| * : :---------------0 = | |
| * :-----------------0 = ROM SELECT (0=ROM, 1=RAM) DEFAULT IS 0 | |
| */ | |
| static int32 n8vem_mem(const int32 Addr, const int32 write, const int32 data) | |
| { | |
| /* DBG_PRINT(("N8VEM: ROM %s, Addr %04x" NLP, write ? "WR" : "RD", Addr)); */ | |
| if(write) { | |
| if(n8vem_info->mpcl_rom & N8VEM_RAM_SELECT) | |
| { | |
| n8vem_info->ram[((n8vem_info->mpcl_ram & N8VEM_RAM_MASK) << 15) | (Addr & N8VEM_ADDR_MASK)] = data; | |
| } else { | |
| if(save_rom == 1) { | |
| n8vem_info->rom[((n8vem_info->mpcl_rom & N8VEM_ROM_MASK) << 15) | (Addr & N8VEM_ADDR_MASK)] = data; | |
| } else { | |
| sim_debug(ROM_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR ROM[0x%05x]: Cannot write to ROM.\n", PCX, ((n8vem_info->mpcl_rom & N8VEM_ROM_MASK) << 15) | (Addr & N8VEM_ADDR_MASK)); | |
| } | |
| } | |
| return 0; | |
| } else { | |
| if(n8vem_info->mpcl_rom & N8VEM_RAM_SELECT) | |
| { | |
| return n8vem_info->ram[((n8vem_info->mpcl_ram & N8VEM_RAM_MASK) << 15) | (Addr & N8VEM_ADDR_MASK)]; | |
| } else { | |
| return n8vem_info->rom[((n8vem_info->mpcl_rom & N8VEM_ROM_MASK) << 15) | (Addr & N8VEM_ADDR_MASK)]; | |
| } | |
| } | |
| } | |
| static int32 n8vemdev(const int32 port, const int32 io, const int32 data) | |
| { | |
| /* DBG_PRINT(("N8VEM: IO %s, Port %02x\n", io ? "WR" : "RD", port)); */ | |
| if(io) { | |
| N8VEM_Write(port, data); | |
| return 0; | |
| } else { | |
| return(N8VEM_Read(port)); | |
| } | |
| } | |
| #define N8VEM_PIO1A 0x00 /* (INPUT) IN 1-8 */ | |
| #define N8VEM_PIO1B 0x01 /* (OUTPUT) OUT TO LEDS */ | |
| #define N8VEM_PIO1C 0x02 /* (INPUT) */ | |
| #define N8VEM_PIO1CONT 0x03 /* CONTROL BYTE PIO 82C55 */ | |
| #define N8VEM_UART_DATA 0x08 | |
| #define N8VEM_UART_RSR 0x09 | |
| #define N8VEM_UART_INTR 0x0A | |
| #define N8VEM_UART_LCR 0x0B | |
| #define N8VEM_UART_MCR 0x0C | |
| #define N8VEM_UART_LSR 0x0D | |
| #define N8VEM_UART_MSR 0x0E | |
| #define N8VEM_UART_SCR 0x0F | |
| #define N8VEM_MPCL_RAM 0x18 /* RAM Address control port */ | |
| #define N8VEM_MPCL_RAM1 0x19 /* RAM Address control port */ | |
| #define N8VEM_MPCL_RAM2 0x1A /* RAM Address control port */ | |
| #define N8VEM_MPCL_RAM3 0x1B /* RAM Address control port */ | |
| #define N8VEM_MPCL_ROM 0x1C /* ROM Address control port */ | |
| #define N8VEM_MPCL_ROM1 0x1D /* ROM Address control port */ | |
| #define N8VEM_MPCL_ROM2 0x1E /* ROM Address control port */ | |
| #define N8VEM_MPCL_ROM3 0x1F /* ROM Address control port */ | |
| extern int32 sio0d(const int32 port, const int32 io, const int32 data); | |
| extern int32 sio0s(const int32 port, const int32 io, const int32 data); | |
| static uint8 N8VEM_Read(const uint32 Addr) | |
| { | |
| uint8 cData = 0xFF; | |
| switch(Addr & 0x1F) { | |
| case N8VEM_PIO1A: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD: PIO1A\n", PCX); | |
| cData = n8vem_pio1a; | |
| break; | |
| case N8VEM_PIO1B: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD: PIO1B\n", PCX); | |
| cData = n8vem_pio1b; | |
| break; | |
| case N8VEM_PIO1C: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD: PIO1C\n", PCX); | |
| cData = n8vem_pio1c; | |
| break; | |
| case N8VEM_PIO1CONT: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD: PIO1CTRL\n", PCX); | |
| cData = n8vem_pio1ctrl; | |
| break; | |
| case N8VEM_UART_LCR: | |
| cData = n8vem_info->uart_lcr; | |
| break; | |
| case N8VEM_UART_DATA: | |
| case N8VEM_UART_RSR: | |
| case N8VEM_UART_LSR: | |
| case N8VEM_UART_INTR: | |
| case N8VEM_UART_MCR: | |
| case N8VEM_UART_MSR: | |
| sim_debug(UART_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD[%02x]: UART not Implemented.\n", PCX, Addr); | |
| break; | |
| case N8VEM_UART_SCR: /* 16550 Scratchpad, implemented so software can detect UART is present */ | |
| cData = n8vem_info->uart_scr; | |
| break; | |
| case N8VEM_MPCL_RAM: | |
| case N8VEM_MPCL_RAM1: | |
| case N8VEM_MPCL_RAM2: | |
| case N8VEM_MPCL_RAM3: | |
| sim_debug(MPCL_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD: MPCL_RAM not Implemented.\n", PCX); | |
| break; | |
| case N8VEM_MPCL_ROM: | |
| case N8VEM_MPCL_ROM1: | |
| case N8VEM_MPCL_ROM2: | |
| case N8VEM_MPCL_ROM3: | |
| sim_debug(MPCL_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD: MPCL_ROM not Implemented.\n", PCX); | |
| break; | |
| default: | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " RD[%02x]: not Implemented.\n", PCX, Addr); | |
| break; | |
| } | |
| return (cData); | |
| } | |
| static uint8 N8VEM_Write(const uint32 Addr, uint8 cData) | |
| { | |
| switch(Addr & 0x1F) { | |
| case N8VEM_PIO1A: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR: PIO1A=0x%02x\n", PCX, cData); | |
| n8vem_pio1a = cData; | |
| break; | |
| case N8VEM_PIO1B: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR: PIO1B=0x%02x\n", PCX, cData); | |
| n8vem_pio1b = cData; | |
| break; | |
| case N8VEM_PIO1C: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR: PIO1C=0x%02x\n", PCX, cData); | |
| n8vem_pio1c = cData; | |
| break; | |
| case N8VEM_PIO1CONT: | |
| sim_debug(PIO_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR: PIO1_CTRL=0x%02x\n", PCX, cData); | |
| n8vem_pio1ctrl = cData; | |
| break; | |
| case N8VEM_UART_LCR: | |
| sim_debug(UART_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR: UART LCR=%02x.\n", PCX, cData); | |
| n8vem_info->uart_lcr = cData; | |
| break; | |
| case N8VEM_UART_DATA: | |
| case N8VEM_UART_RSR: | |
| case N8VEM_UART_INTR: | |
| case N8VEM_UART_MCR: | |
| case N8VEM_UART_LSR: | |
| case N8VEM_UART_MSR: | |
| sim_debug(UART_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR[%02x]: UART not Implemented.\n", PCX, Addr); | |
| break; | |
| case N8VEM_UART_SCR: /* 16550 Scratchpad, implemented so software can detect UART is present */ | |
| n8vem_info->uart_scr = cData; | |
| break; | |
| case N8VEM_MPCL_RAM: | |
| case N8VEM_MPCL_RAM1: | |
| case N8VEM_MPCL_RAM2: | |
| case N8VEM_MPCL_RAM3: | |
| sim_debug(MPCL_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR: MPCL_RAM=0x%02x\n", PCX, cData); | |
| n8vem_info->mpcl_ram = cData; | |
| break; | |
| case N8VEM_MPCL_ROM: | |
| case N8VEM_MPCL_ROM1: | |
| case N8VEM_MPCL_ROM2: | |
| case N8VEM_MPCL_ROM3: | |
| sim_debug(MPCL_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR: MPCL_ROM=0x%02x\n", PCX, cData); | |
| n8vem_info->mpcl_rom = cData; | |
| break; | |
| default: | |
| sim_debug(VERBOSE_MSG, &n8vem_dev, "N8VEM: " ADDRESS_FORMAT " WR[0x%02x]=0x%02x: not Implemented.\n", PCX, Addr, cData); | |
| break; | |
| } | |
| return(0); | |
| } | |