--- np2/bios/bios.c 2003/12/01 10:45:46 1.8 +++ np2/bios/bios.c 2004/03/12 18:19:57 1.58 @@ -1,57 +1,121 @@ #include "compiler.h" +#include "strres.h" #include "dosio.h" -#include "i286.h" -#include "memory.h" +#include "cpucore.h" #include "pccore.h" #include "iocore.h" #include "bios.h" #include "biosmem.h" -#include "sound.h" -#include "fmboard.h" +#include "sxsibios.h" #include "lio.h" #include "fddfile.h" #include "fdd_mtr.h" #include "fdfmt.h" #include "keytable.res" #include "itfrom.res" +#include "startup.res" +#include "biosboot.res" - BOOL biosrom = FALSE; +#define BIOS_SIMULATE -static const char file_biosrom[] = "bios.rom"; + BOOL biosrom = FALSE; static const char neccheck[] = "Copyright (C) 1983 by NEC Corporation"; // 00/05/18 MS-DOS6.2 on PC-9801VX calling proc static const BYTE printmain[] = {0x90, 0x5a, 0x1f, 0xcf}; -static const BYTE nosyscode[] = { - 0xeb,0x05,0xbe,0x6f,0x00,0xeb,0x03,0xbe,0x47,0x00,0xb8,0x00, - 0x10,0xbb,0x00,0x80,0x8e,0xd0,0x8b,0xe3,0x8c,0xc8,0x8e,0xd8, - 0xb8,0x00,0xa0,0x8e,0xc0,0xb9,0x00,0x10,0xb8,0x20,0x00,0x33, - 0xff,0xfc,0xf3,0xab,0xb0,0xe1,0xb9,0xe0,0x1f,0xaa,0x47,0xe2, - 0xfc,0x2e,0xad,0x8b,0xf8,0x2e,0xad,0x85,0xc0,0x74,0x0a,0xab, - 0x0a,0xe4,0x74,0xf5,0x83,0xc7,0x02,0xeb,0xf0,0xeb,0xfe,0xac, - 0x07,0x05,0x37,0x05,0x39,0x05,0x46,0x05,0x60,0x05,0x47,0x05, - 0x23,0x05,0x39,0x05,0x2f,0x04,0x72,0x05,0x3b,0x05,0x43,0x05, - 0x48,0x04,0x37,0x04,0x46,0x04,0x2f,0x04,0x40,0x04,0x35,0x04, - 0x24,0x00,0x00,0xae,0x07,0x42,0x00,0x41,0x00,0x53,0x00,0x49, - 0x00,0x43,0x00,0x04,0x4e,0x15,0x2f,0x26,0x30,0x04,0x4b,0x04, - 0x4f,0x20,0x00,0x42,0x00,0x49,0x00,0x4f,0x00,0x53,0x00,0x2e, - 0x00,0x52,0x00,0x4f,0x00,0x4d,0x00,0x04,0x2c,0x29,0x2c,0x2d, - 0x57,0x04,0x47,0x04,0x39,0x00,0x00}; +typedef struct { + UINT8 port; + UINT8 data; +} IODATA; + +static const IODATA iodata[] = { + // DMA + {0x29, 0x00}, {0x29, 0x01}, {0x29, 0x02}, {0x29, 0x03}, + {0x27, 0x00}, {0x21, 0x00}, {0x23, 0x00}, {0x25, 0x00}, + {0x1b, 0x00}, {0x11, 0x40}, + + // PIT + {0x77, 0x30}, {0x71, 0x00}, {0x71, 0x00}, + {0x77, 0x76}, {0x73, 0xcd}, {0x73, 0x04}, + {0x77, 0xb6}, + + // PIC + {0x00, 0x11}, {0x02, 0x08}, {0x02, 0x80}, {0x02, 0x1d}, + {0x08, 0x11}, {0x0a, 0x10}, {0x0a, 0x07}, {0x0a, 0x09}, + {0x02, 0x7d}, {0x0a, 0x71}}; + +static const UINT8 msw_default[8] = + {0x48, 0x05, 0x04, 0x00, 0x01, 0x00, 0x00, 0x6e}; + + +static void bios_itfprepare(void) { + +const IODATA *p; +const IODATA *pterm; + + p = iodata; + pterm = iodata + (sizeof(iodata) / sizeof(IODATA)); + while(p < pterm) { + iocore_out8(p->port, p->data); + p++; + } + + // GDCの初期化。 + // … +} + +static void bios_memclear(void) { + ZeroMemory(mem, 0xa0000); + ZeroMemory(mem + 0x100000, 0x10000); + if (CPU_EXTMEM) { + ZeroMemory(CPU_EXTMEM, CPU_EXTMEMSIZE); + } + ZeroMemory(mem + VRAM0_B, 0x18000); + ZeroMemory(mem + VRAM0_E, 0x08000); + ZeroMemory(mem + VRAM1_B, 0x18000); + ZeroMemory(mem + VRAM1_E, 0x08000); +} static void bios_reinitbyswitch(void) { BYTE prxcrt; BYTE prxdupd; BYTE biosflag; - BYTE ext_mem; + UINT8 boot; + +#if defined(CPUCORE_IA32) + UINT16 org_cs; + UINT16 org_ip; + + org_cs = CPU_CS; + org_ip = CPU_IP; + CPU_SHUT(); + CPU_CS = org_cs; + CPU_IP = org_ip; + SETBIOSMEM16(0x00486, CPU_DX); +#endif + + if (!(np2cfg.dipsw[2] & 0x80)) { +#if defined(CPUCORE_IA32) + mem[MEMB_SYS_TYPE] = 0x03; // 80386〜 +#else + mem[MEMB_SYS_TYPE] = 0x01; // 80286 +#endif + } + else { + mem[MEMB_SYS_TYPE] = 0x00; // V30 + } - CPUTYPE = 0; - prxcrt = 0xc8; - if (gdc.display & 2) { + mem[MEMB_BIOS_FLAG0] = 0x01; + prxcrt = 0x08; + if (!(np2cfg.dipsw[0] & 0x01)) { // dipsw1-1 on + prxcrt |= 0x40; + } + if (gdc.display & (1 << GDCDISP_ANALOG)) { prxcrt |= 0x04; // color16 } if (!(np2cfg.dipsw[0] & 0x80)) { // dipsw1-8 on @@ -72,38 +136,52 @@ static void bios_reinitbyswitch(void) { mem[MEMB_PRXDUPD] = prxdupd; biosflag = 0x20; - if (pc.cpumode & CPUMODE_8MHz) { + if (pccore.cpumode & CPUMODE_8MHZ) { biosflag |= 0x80; } biosflag |= mem[0xa3fea] & 7; - if (!(np2cfg.dipsw[2] & 0x80)) { - ext_mem = np2cfg.EXTMEM; // ver0.28 - } - else { - CPUTYPE = CPUTYPE_V30; - ext_mem = 0; + if (np2cfg.dipsw[2] & 0x80) { biosflag |= 0x40; } - if (extmem_init(ext_mem)) { // ver0.28 - ext_mem = 0; // メモリ確保に失敗 - } - mem[MEMB_BIOS_FLAG] = biosflag; - mem[MEMB_EXPMMSZ] = (BYTE)(ext_mem << 3); + mem[MEMB_BIOS_FLAG1] = biosflag; + mem[MEMB_EXPMMSZ] = (BYTE)(pccore.extmem << 3); mem[MEMB_CRT_RASTER] = 0x0f; - gdc.display &= ~4; - if (!(np2cfg.dipsw[0] & 0x04)) { // dipsw1-3 on - gdc.display |= 4; - } - gdcs.textdisp |= GDCSCRN_EXT; - - if ((pc.model >= PCMODEL_VX) && (usesound & 0x7e)) { - iocore_out8(0x188, 0x27); - iocore_out8(0x18a, 0x3f); + // FDD initialize + SETBIOSMEM32(MEMD_F2DD_POINTER, 0xfd801ad7); + SETBIOSMEM32(MEMD_F2HD_POINTER, 0xfd801aaf); + boot = mem[MEMB_MSW5] & 0xf0; + if (boot != 0x20) { // 1MB + fddbios_equip(3, TRUE); + mem[MEMB_BIOS_FLAG0] |= 0x02; + } + else { // 640KB + fddbios_equip(0, TRUE); + mem[MEMB_BIOS_FLAG0] &= ~0x02; + } + mem[MEMB_F2DD_MODE] = 0xff; + +#if defined(SUPPORT_CRT31KHZ) + mem[MEMB_CRT_BIOS] = 0x80; +#endif +#if defined(SUPPORT_PC9821) + mem[0x45c] = 0x40; +#endif + + // FDC + if (fdc.support144) { + mem[MEMB_F144_SUP] |= fdc.equip; + } + + // IDE initialize + if (pccore.hddif & PCHDD_IDE) { + mem[MEMB_SYS_TYPE] |= 0x80; // IDE + CPU_AX = 0x8300; + sasibios_operate(); } } -static void bios_vectorset(void) { // ver0.30 +static void bios_vectorset(void) { UINT i; @@ -117,6 +195,16 @@ static void bios_vectorset(void) { SETBIOSMEM32(0x1e*4, 0xe8000000); } +static void bios_screeninit(void) { + + REG8 al; + + al = 4; + al += (np2cfg.dipsw[1] & 0x04) >> 1; + al += (np2cfg.dipsw[1] & 0x08) >> 3; + bios0x18_0a(al); +} + // CDSで見てる為、変更…(涙 static const UINT16 biosoffset[0x20] = { @@ -130,11 +218,12 @@ static const UINT16 biosoffset[0x20] = { BIOSOFST_EOIS, BIOSOFST_EOIS, BIOSOFST_EOIS, BIOSOFST_EOIS, BIOSOFST_18, BIOSOFST_19, BIOSOFST_1a, BIOSOFST_1b, - BIOSOFST_1c, BIOSOFST_IRET, BIOSOFST_1e, BIOSOFST_IRET}; + BIOSOFST_1c, BIOSOFST_IRET, BIOSOFST_1e, BIOSOFST_1f}; -void bios_init(void) { +void bios_initialize(void) { + char path[MAX_PATH]; FILEH fh; UINT i; UINT pos; @@ -143,9 +232,11 @@ void bios_init(void) { // まぁDISK BASIC動くようになるからいいんじゃないですか？ // BASIC BIOSは 8086コードのように見えるけど… - fh = file_open_c(file_biosrom); + getbiospath(path, str_biosrom, sizeof(path)); + fh = file_open_rb(path); if (fh != FILEH_INVALID) { if (file_read(fh, mem + 0x0e8000, 0x18000) == 0x18000) { + TRACEOUT(("load bios.rom")); biosrom = TRUE; } file_close(fh); @@ -154,20 +245,21 @@ void bios_init(void) { CopyMemory(mem + 0x0e8000, nosyscode, sizeof(nosyscode)); } +#if defined(BIOS_SIMULATE) // BIOS hookのアドレス変更 for (i=0; i<0x20; i++) { STOREINTELWORD(mem + 0xfd868 + i*2, biosoffset[i]); } SETBIOSMEM16(BIOS_BASE + BIOSOFST_IRET, 0x50cf); SETBIOSMEM16(BIOS_BASE + BIOSOFST_WAIT, 0xcf90); - for (i=(BIOS_BASE+BIOSOFST_EOIM); i<=(BIOS_BASE+BIOSOFST_1c); i+=2) { + for (i=(BIOS_BASE+BIOSOFST_EOIM); i<=(BIOS_BASE+BIOSOFST_1f); i+=2) { SETBIOSMEM16(i, 0xcf90); } CopyMemory(mem + BIOS_BASE + BIOSOFST_PRT, printmain, sizeof(printmain)); - bios_vectorset(); // ver0.29 +// bios_vectorset(); if (!biosrom) { - lio_init(); + lio_initialize(); } SETBIOSMEM16(0xfd800, 0xcb90); @@ -175,90 +267,164 @@ void bios_init(void) { for (i=0; i<8; i+=2) { STOREINTELWORD(mem + 0xfd800 + 0x1aaf + i, 0x1ab7); STOREINTELWORD(mem + 0xfd800 + 0x1ad7 + i, 0x1adf); - STOREINTELWORD(mem + 0xfd800 + 0x2361 + i, 0x1980); // ver0.31 + STOREINTELWORD(mem + 0xfd800 + 0x2361 + i, 0x1980); } CopyMemory(mem + 0xfd800 + 0x1ab7, fdfmt2hd, sizeof(fdfmt2hd)); CopyMemory(mem + 0xfd800 + 0x1adf, fdfmt2dd, sizeof(fdfmt2dd)); - CopyMemory(mem + 0xfd800 + 0x1980, fdfmt144, sizeof(fdfmt144)); // ver0.31 + CopyMemory(mem + 0xfd800 + 0x1980, fdfmt144, sizeof(fdfmt144)); SETBIOSMEM16(0xfffe8, 0xcb90); SETBIOSMEM16(0xfffec, 0xcb90); mem[0xffff0] = 0xea; STOREINTELDWORD(mem + 0xffff1, 0xfd800000); -#if 1 + if ((!biosrom) && (!(pccore.model & PCMODEL_EPSON))) { + CopyMemory(mem + 0xe8dd8, neccheck, 0x25); + pos = LOADINTELWORD(itfrom + 2); + CopyMemory(mem + 0xf538e, itfrom + pos, 0x27); + } + +// bios_reinitbyswitch(); +// mem[MEMB_CRT_STS_FLAG] = 0x84; // -> bios_screeninit() +// mem[MEMB_BIOS_FLAG0] = 0x03; +// mem[MEMB_F2DD_MODE] = 0xff; +// SETBIOSMEM16(MEMW_DISK_EQUIP, 0x0003); +// mem[0x005ae] |= 0x03; + + CopyMemory(mem + 0x0fde00, keytable[0], 0x300); +// bios0x09_init(); + CopyMemory(mem + ITF_ADRS, itfrom, sizeof(itfrom)); mem[ITF_ADRS + 0x7ff0] = 0xea; STOREINTELDWORD(mem + ITF_ADRS + 0x7ff1, 0xf8000000); -#if 0 -fh = file_create("itf.rom"); -if (fh != FILEH_INVALID) { - file_write(fh, itfrom, sizeof(itfrom)); - file_close(fh); -} -#endif + if (pccore.model & PCMODEL_EPSON) { + mem[ITF_ADRS + 0x7ff1] = 0x04; + } + else if ((pccore.model & PCMODELMASK) == PCMODEL_VM) { + mem[ITF_ADRS + 0x7ff1] = 0x08; + } + + CopyMemory(mem + 0xfd800 + 0x2400, biosboot, sizeof(biosboot)); #else fh = file_open_c("itf.rom"); if (fh != FILEH_INVALID) { - file_read(fh, &mem[ITF_ADRS], 0x8000); + file_read(fh, mem + ITF_ADRS, 0x8000); file_close(fh); + TRACEOUT(("load itf.rom")); } #endif - if (!biosrom) { - CopyMemory(mem + 0xe8dd8, neccheck, 0x25); - pos = LOADINTELWORD(itfrom + 2); - CopyMemory(mem + 0xf538e, itfrom + pos, 0x27); - } - bios_reinitbyswitch(); - mem[MEMB_CRT_STS_FLAG] = 0x84; - mem[MEMB_BIOS_FLAG0] = 0x03; // 00/05/17 beep tone - mem[MEMB_F2DD_MODE] = 0xff; // ver0.29 - SETBIOSMEM16(MEMW_DISK_EQUIP, 0x0003); // ver0.29 - SETBIOSMEM32(MEMD_F2DD_POINTER, 0xfd801ad7); - SETBIOSMEM32(MEMD_F2HD_POINTER, 0xfd801aaf); - mem[0x005ae] |= 0x03; // ver0.31 - - CopyMemory(mem + 0x0fde00, keytable[0], 0x300); - bios0x09_init(); + CopyMemory(mem + 0x1c0000, mem + ITF_ADRS, 0x08000); + CopyMemory(mem + 0x1e8000, mem + 0x0e8000, 0x10000); } static void bios_boot(void) { - if (sysport.c & 0x80) { - if (!(sysport.c & 0x20)) { - bios_reinitbyswitch(); - } - I286_CS = 0x0000; - I286_IP = 0x04f8; - I286_DS = 0x0000; - I286_DX = 0x43d; - I286_AL = 0x10; - mem[0x004f8] = 0xee; // out dx, al - mem[0x004f9] = 0xea; // call far - SETBIOSMEM16(0x004fa, 0x0000); - SETBIOSMEM16(0x004fc, 0xffff); + int i; + + if (!(sysport.c & 0x80)) { + CPU_SP = GETBIOSMEM16(0x00404); + CPU_SS = GETBIOSMEM16(0x00406); +// TRACEOUT(("CPU Reset... SS:SP = %.4x:%.4x", CPU_SS, CPU_SP)); } else { - I286_SP = GETBIOSMEM16(0x00404); - I286_SS = GETBIOSMEM16(0x00406); + bios_itfprepare(); + bios_memclear(); + bios_vectorset(); + bios0x09_init(); + bios_reinitbyswitch(); + + if (!np2cfg.ITF_WORK) { + for (i=0; i<8; i++) { + mem[MEMB_MSW + (i*4)] = msw_default[i]; + } + CPU_IP = 0x0002; + } + else if (sysport.c & 0x20) { + CPU_CS = 0x0000; + CPU_IP = 0x04f8; + CPU_DS = 0x0000; + CPU_DX = 0x43d; + CPU_AL = 0x10; + mem[0x004f8] = 0xee; // out dx, al + mem[0x004f9] = 0xea; // call far + SETBIOSMEM16(0x004fa, 0x0000); + SETBIOSMEM16(0x004fc, 0xffff); + } + else { + CPU_IP = 0x0002; + } } } +// テスト(こんなんじゃだめぽ +static void bios0x1f(void) { + + BYTE work[256]; + UINT32 src; + UINT32 dst; + UINT leng; + UINT l; + + if (CPU_AH == 0x90) { + MEML_READSTR(CPU_ES, CPU_BX + 0x10, work, 0x10); + src = work[2] + (work[3] << 8) + (work[4] << 16) + CPU_SI; + dst = work[10] + (work[11] << 8) + (work[12] << 16) + CPU_DI; + leng = LOW16(CPU_CX - 1) + 1; + TRACEOUT(("protect bios: memmove")); + TRACEOUT(("%.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x", + work[0], work[1], work[2], work[3], + work[4], work[5], work[6], work[7])); + TRACEOUT(("%.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x", + work[8], work[9], work[10], work[11], + work[12], work[13], work[14], work[15])); + TRACEOUT(("SI=%.4x DI=%.4x CX=%.4x", CPU_SI, CPU_DI, CPU_CX)); + TRACEOUT(("src:%08x dst:%08x leng:%08x", src, dst, leng)); + do { + l = min(leng, 256); + MEML_READ(src, work, l); + MEML_WRITE(dst, work, l); + src += l; + dst += l; + leng -= l; + } while(leng); + } + else { + TRACEOUT(("unsupport protect bios AH=%.2x", CPU_AH)); + } +} UINT MEMCALL biosfunc(UINT32 adrs) { UINT16 bootseg; - if ((i286core.s.itfbank) && (adrs >= 0xf8000) && (adrs < 0x100000)) { - I286_IP--; - I286_REMCLOCK = -1; - return(1); + if ((CPU_ITFBANK) && (adrs >= 0xf8000) && (adrs < 0x100000)) { + // for epson ITF + return(0); + } + +// TRACEOUT(("biosfunc(%x)", adrs)); +#if defined(CPUCORE_IA32) && defined(TRACE) + if (CPU_STAT_PAGING) { + UINT32 pde = i286_memoryread_d(CPU_STAT_PDE_BASE); + if (!(pde & CPU_PDE_PRESENT)) { + TRACEOUT(("page0: PTE not present")); + } + else { + UINT32 pte = i286_memoryread_d(pde & CPU_PDE_BASEADDR_MASK); + if (!(pte & CPU_PTE_PRESENT)) { + TRACEOUT(("page0: not present")); + } + else if (pte & CPU_PTE_BASEADDR_MASK) { + TRACEOUT(("page0: physical address != 0 (pte = %.8x)", pte)); + } + } } +#endif - switch(adrs) { // ver0.30 + switch(adrs) { case BIOS_BASE + BIOSOFST_EOIM: - I286_REMCLOCK -= 300; + CPU_REMCLOCK -= 300; iocore_out8(0x00, 0x20); return(0); @@ -270,80 +436,84 @@ UINT MEMCALL biosfunc(UINT32 adrs) { return(0); case BIOS_BASE + BIOSOFST_02: - I286_REMCLOCK -= 300; + CPU_REMCLOCK -= 300; bios0x02(); return(1); case BIOS_BASE + BIOSOFST_08: - I286_REMCLOCK -= 300; + CPU_REMCLOCK -= 300; bios0x08(); return(1); case BIOS_BASE + BIOSOFST_09: - I286_REMCLOCK -= 300; + CPU_REMCLOCK -= 300; bios0x09(); return(1); case BIOS_BASE + BIOSOFST_0c: - I286_REMCLOCK -= 500; + CPU_REMCLOCK -= 500; bios0x0c(); return(1); case BIOS_BASE + BIOSOFST_12: - I286_REMCLOCK -= 500; + CPU_REMCLOCK -= 500; bios0x12(); return(1); case BIOS_BASE + BIOSOFST_13: - I286_REMCLOCK -= 500; + CPU_REMCLOCK -= 500; bios0x13(); return(1); case BIOS_BASE + BIOSOFST_18: - I286_REMCLOCK -= 200; + CPU_REMCLOCK -= 200; bios0x18(); return(1); case BIOS_BASE + BIOSOFST_19: - I286_REMCLOCK -= 200; + CPU_REMCLOCK -= 200; bios0x19(); return(1); case BIOS_BASE + BIOSOFST_1a: - I286_REMCLOCK -= 200; + CPU_REMCLOCK -= 200; bios0x1a(); return(1); case BIOS_BASE + BIOSOFST_1b: - I286_REMCLOCK -= 200; + CPU_STI; + CPU_REMCLOCK -= 200; bios0x1b(); return(1); case BIOS_BASE + BIOSOFST_1c: - I286_REMCLOCK -= 200; + CPU_REMCLOCK -= 200; bios0x1c(); return(1); + case BIOS_BASE + BIOSOFST_1f: + CPU_REMCLOCK -= 200; + bios0x1f(); + return(1); + case BIOS_BASE + BIOSOFST_WAIT: - I286_STI; - if (fddmtr_biosbusy) { // ver0.26 - I286_IP--; - I286_REMCLOCK = -1; + CPU_STI; + if (fddmtr.busy) { + CPU_IP--; + CPU_REMCLOCK = -1; } else { - switch(CTRL_FDMEDIA) { - case DISKTYPE_2HD: - if (pic.pi[1].isr & PIC_INT42) { - I286_IP--; - I286_REMCLOCK -= 1000; - } - break; - case DISKTYPE_2DD: - if (pic.pi[1].isr & PIC_INT41) { - I286_IP--; - I286_REMCLOCK -= 1000; - } - break; + if (fdc.chgreg & 1) { + if (!(mem[0x0055e] & (0x01 << fdc.us))) { + CPU_IP--; + CPU_REMCLOCK -= 1000; + } + } + else { + if (!(mem[0x0055f] & (0x10 << fdc.us))) { + CPU_IP--; + CPU_REMCLOCK -= 1000; + } } } return(1); @@ -357,39 +527,57 @@ UINT MEMCALL biosfunc(UINT32 adrs) { return(1); case 0xfd802: // ブート - bios_reinitbyswitch(); // ver0.27 - bios_vectorset(); // ver0.29 + bios_reinitbyswitch(); + bios_vectorset(); + bios_screeninit(); + if (((pccore.model & PCMODELMASK) >= PCMODEL_VX) && + (pccore.sound & 0x7e)) { + iocore_out8(0x188, 0x27); + iocore_out8(0x18a, 0x3f); + } + +#if 1 // ver0.73 + CPU_CS = 0xfd80; // SASI/SCSIリセット + CPU_IP = 0x2400; +#else bootseg = bootstrapload(); - I286_STI; - I286_CS = (bootseg != 0)?bootseg:0xe800; - I286_DS = 0x0000; - I286_SS = 0x0030; - I286_SP = 0x00e6; - I286_IP = 0x0000; + CPU_STI; + CPU_CS = (bootseg != 0)?bootseg:0xe800; + CPU_DS = 0x0000; + CPU_SS = 0x0030; + CPU_SP = 0x00e6; + CPU_IP = 0x0000; +#endif return(1); case 0xfffe8: // ブートストラップロード - I286_REMCLOCK -= 2000; + CPU_REMCLOCK -= 2000; bootseg = bootstrapload(); if (bootseg) { - I286_STI; - I286_CS = bootseg; - I286_IP = 0x0000; - I286_SS = 0x0030; - I286_SP = 0x00e6; + CPU_STI; + CPU_CS = bootseg; + CPU_IP = 0x0000; return(1); } return(0); case 0xfffec: - I286_REMCLOCK -= 2000; + CPU_REMCLOCK -= 2000; bootstrapload(); return(0); } - if ((adrs >= 0xf9a00) && (adrs < 0x0f9a24)) { - if (!(adrs & 1)) { - bios_lio((BYTE)((adrs - 0xf9a00) >> 1)); + if ((adrs >= 0xf9a00) && (adrs < 0x0f9a44)) { + if (!(adrs & 3)) { + CPU_REMCLOCK -= 500; + bios_lio((REG8)((adrs - 0xf9a00) >> 2)); + } + else { + if (nevent_iswork(NEVENT_GDCSLAVE)) { + CPU_IP--; + CPU_REMCLOCK = -1; + return(1); + } } return(0); } @@ -397,8 +585,8 @@ UINT MEMCALL biosfunc(UINT32 adrs) { if (biosrom) { return(0); } - I286_IP--; - I286_REMCLOCK = -1; + CPU_IP--; + CPU_REMCLOCK = -1; return(1); }