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| version 1.18, 2004/01/30 01:29:13 | version 1.35, 2005/05/15 18:48:36 |
|---|---|
| Line 17 enum { | Line 17 enum { |
| }; | }; |
| static BYTE mtr_c = 0; | |
| static UINT mtr_r = 0; | |
| // ---- FDD | // ---- FDD |
| static BOOL setfdcmode(REG8 drv, REG8 type, REG8 rpm) { | static BOOL setfdcmode(REG8 drv, REG8 type, REG8 rpm) { |
| Line 72 static void biosfd_setchrn(void) { | Line 68 static void biosfd_setchrn(void) { |
| #if 0 | #if 0 |
| static void biosfd_resultout(UINT32 result) { | static void biosfd_resultout(UINT32 result) { |
| BYTE *ptr; | UINT8 *ptr; |
| ptr = mem + 0x00564 + (fdc.us*8); | ptr = mem + 0x00564 + (fdc.us*8); |
| ptr[0] = (BYTE)(result & 0xff) | (fdc.hd << 2) | fdc.us; | ptr[0] = (UINT8)(result & 0xff) | (fdc.hd << 2) | fdc.us; |
| ptr[1] = (BYTE)(result >> 8); | ptr[1] = (UINT8)(result >> 8); |
| ptr[2] = (BYTE)(result >> 16); | ptr[2] = (UINT8)(result >> 16); |
| ptr[3] = fdc.C; | ptr[3] = fdc.C; |
| ptr[4] = fdc.H; | ptr[4] = fdc.H; |
| ptr[5] = fdc.R; | ptr[5] = fdc.R; |
| Line 97 static BOOL biosfd_seek(REG8 track, BOOL | Line 93 static BOOL biosfd_seek(REG8 track, BOOL |
| } | } |
| } | } |
| fdc.ncn = track; | fdc.ncn = track; |
| mtr_c = track; | |
| if (fdd_seek()) { | if (fdd_seek()) { |
| return(FAILURE); | return(FAILURE); |
| } | } |
| Line 126 static UINT16 fdfmt_biospara(REG8 type, | Line 121 static UINT16 fdfmt_biospara(REG8 type, |
| off = 0x2361; // see bios.cpp | off = 0x2361; // see bios.cpp |
| } | } |
| off += fdc.us * 2; | off += fdc.us * 2; |
| off = i286_memword_read(seg, off); | off = MEML_READ16(seg, off); |
| off += n * 8; | off += n * 8; |
| if (!(CPU_AH & 0x40)) { | if (!(CPU_AH & 0x40)) { |
| off += 4; | off += 4; |
| Line 134 static UINT16 fdfmt_biospara(REG8 type, | Line 129 static UINT16 fdfmt_biospara(REG8 type, |
| if (fmt) { | if (fmt) { |
| off += 2; | off += 2; |
| } | } |
| return(i286_memword_read(seg, off)); | return(MEML_READ16(seg, off)); |
| } | } |
| Line 152 enum { | Line 147 enum { |
| static void fdd_int(int result) { | static void fdd_int(int result) { |
| if (result == FDCBIOS_NORESULT) { // ver0.29 | if (result == FDCBIOS_NORESULT) { |
| return; | return; |
| } | } |
| switch(CPU_AH & 0x0f) { | switch(CPU_AH & 0x0f) { |
| Line 207 static void fdd_int(int result) { | Line 202 static void fdd_int(int result) { |
| return; | return; |
| } | } |
| if (fdc.chgreg & 1) { | if (fdc.chgreg & 1) { |
| mem[0x0055e] &= ~(0x01 << fdc.us); | mem[MEMB_DISK_INTL] &= ~(0x01 << fdc.us); |
| } | } |
| else { | else { |
| mem[0x0055f] &= ~(0x10 << fdc.us); | mem[MEMB_DISK_INTH] &= ~(0x10 << fdc.us); |
| } | } |
| CPU_IP = BIOSOFST_WAIT; | CPU_IP = BIOSOFST_WAIT; |
| } | } |
| Line 240 static void b0patch(void) { | Line 235 static void b0patch(void) { |
| REG8 c; | REG8 c; |
| REG8 cl; | REG8 cl; |
| REG8 last; | REG8 last; |
| addr = ES_BASE + CPU_BP; | addr = CPU_BP; |
| size = CPU_BX; | size = CPU_BX; |
| cnt = 0; | cnt = 0; |
| last = 0; | last = 0; |
| while(size--) { | while(size--) { |
| c = i286_memoryread(addr++); | c = MEML_READ8(ES_BASE, addr++); |
| cl = 0; | cl = 0; |
| do { | do { |
| REG8 now = c & 0x80; | REG8 now = c & 0x80; |
| Line 269 static void b0patch(void) { | Line 264 static void b0patch(void) { |
| } | } |
| } | } |
| if ((b0p.pos >> 3) < CPU_BX) { | if ((b0p.pos >> 3) < CPU_BX) { |
| UINT32 addr; | UINT addr; |
| REG8 c; | REG8 c; |
| addr = ES_BASE + CPU_BP + (b0p.pos >> 3); | addr = CPU_BP + (b0p.pos >> 3); |
| c = i286_memoryread(addr); | c = MEML_READ8(CPU_ES, addr); |
| c ^= (1 << (b0p.pos & 7)); | c ^= (1 << (b0p.pos & 7)); |
| b0p.pos++; | b0p.pos++; |
| i286_memorywrite(addr, c); | MEML_WRITE8(CPU_ES, addr, c); |
| } | } |
| } | } |
| } | } |
| Line 293 static REG8 fdd_operate(REG8 type, REG8 | Line 288 static REG8 fdd_operate(REG8 type, REG8 |
| UINT16 accesssize; | UINT16 accesssize; |
| UINT16 secsize; | UINT16 secsize; |
| UINT16 para; | UINT16 para; |
| BYTE s; | UINT8 s; |
| BYTE ID[4]; | UINT8 ID[4]; |
| BYTE hd; | UINT8 hd; |
| int result = FDCBIOS_NORESULT; | int result = FDCBIOS_NORESULT; |
| UINT32 addr; | UINT32 addr; |
| UINT8 mtr_c; | |
| UINT mtr_r; | |
| UINT fmode; | |
| mtr_c = 0xff; | mtr_c = fdc.ncn; |
| mtr_r = 0; | mtr_r = 0; |
| // とりあえずBIOSの時は無視する | // とりあえずBIOSの時は無視する |
| fdc.mf = 0xff; // ver0.29 | fdc.mf = 0xff; |
| // TRACE_("int 1Bh", CPU_AH); | // TRACE_("int 1Bh", CPU_AH); |
| Line 336 static REG8 fdd_operate(REG8 type, REG8 | Line 334 static REG8 fdd_operate(REG8 type, REG8 |
| } | } |
| if (!fdd_diskready(fdc.us)) { | if (!fdd_diskready(fdc.us)) { |
| fdd_int(FDCBIOS_NONREADY); | fdd_int(FDCBIOS_NONREADY); |
| if (CPU_AH == 0x84) { // ver0.28 | ret_ah = 0x60; |
| return(0x68); // 新センスは 両用ドライブ情報も | if ((CPU_AX & 0x8f40) == 0x8400) { |
| } | ret_ah |= 8; // 1MB/640KB両用ドライブ |
| if (CPU_AH == 0xc4) { // ver0.31 | if ((CPU_AH & 0x40) && (fdc.support144)) { |
| if (fdc.support144) { | ret_ah |= 4; // 1.44対応ドライブ |
| return(0x6c); | |
| } | } |
| return(0x68); | |
| } | } |
| return(0x60); | return(ret_ah); |
| } | } |
| } | } |
| // 2DDのモード選択 // ver0.29 | // モード選択 // ver0.78 |
| if (type == DISKTYPE_2DD) { | fmode = (type & 1)?MEMB_F2HD_MODE:MEMB_F2DD_MODE; |
| if (!(mem[MEMB_F2DD_MODE] & (0x10 << fdc.us))) { | if (!(CPU_AL & 0x80)) { |
| ndensity = 1; | if (!(mem[fmode] & (0x10 << fdc.us))) { |
| ndensity = TRUE; | |
| } | } |
| } | } |
| Line 404 static REG8 fdd_operate(REG8 type, REG8 | Line 401 static REG8 fdd_operate(REG8 type, REG8 |
| break; | break; |
| } | } |
| size -= accesssize; | size -= accesssize; |
| mtr_r += accesssize; // ver0.26 | mtr_r += accesssize; |
| if ((fdc.R++ == (UINT8)para) && | if ((fdc.R++ == (UINT8)para) && |
| (CPU_AH & 0x80) && (!fdc.hd)) { | (CPU_AH & 0x80) && (!fdc.hd)) { |
| fdc.hd = 1; | fdc.hd = 1; |
| Line 442 static REG8 fdd_operate(REG8 type, REG8 | Line 439 static REG8 fdd_operate(REG8 type, REG8 |
| ret_ah |= 0x01; | ret_ah |= 0x01; |
| } | } |
| else { // 2DD | else { // 2DD |
| if (mem[0x005ca] & (0x01 << fdc.us)) { | if (mem[fmode] & (0x01 << fdc.us)) { |
| ret_ah++; | ret_ah |= 0x01; |
| } | } |
| if (mem[0x005ca] & (0x10 << fdc.us)) { // ver0.30 | if (mem[fmode] & (0x10 << fdc.us)) { |
| ret_ah |= 0x04; | ret_ah |= 0x04; |
| } | } |
| } | } |
| if (CPU_AH & 0x80) { // ver0.30 | if ((CPU_AX & 0x8f40) == 0x8400) { |
| ret_ah |= 8; // 1MB/640KB両用ドライブ | ret_ah |= 8; // 1MB/640KB両用ドライブ |
| if ((CPU_AH & 0x40) && (fdc.support144)) { | if ((CPU_AH & 0x40) && (fdc.support144)) { |
| ret_ah |= 4; // 1.44対応ドライブ | ret_ah |= 4; // 1.44対応ドライブ |
| Line 494 static REG8 fdd_operate(REG8 type, REG8 | Line 491 static REG8 fdd_operate(REG8 type, REG8 |
| else { | else { |
| accesssize = size; | accesssize = size; |
| } | } |
| i286_memx_read(addr, fdc.buf, accesssize); | MEML_READ(addr, fdc.buf, accesssize); |
| if (fdd_write()) { | if (fdd_write()) { |
| break; | break; |
| } | } |
| addr += accesssize; | addr += accesssize; |
| size -= accesssize; | size -= accesssize; |
| mtr_r += accesssize; // ver0.26 | mtr_r += accesssize; |
| if ((fdc.R++ == (UINT8)para) && | if ((fdc.R++ == (UINT8)para) && |
| (CPU_AH & 0x80) && (!fdc.hd)) { | (CPU_AH & 0x80) && (!fdc.hd)) { |
| fdc.hd = 1; | fdc.hd = 1; |
| Line 516 static REG8 fdd_operate(REG8 type, REG8 | Line 513 static REG8 fdd_operate(REG8 type, REG8 |
| result = FDCBIOS_SUCCESS; | result = FDCBIOS_SUCCESS; |
| } | } |
| else { | else { |
| ret_ah = fddlasterror; // 0xc0 // ver0.28 | ret_ah = fddlasterror; // 0xc0 |
| result = FDCBIOS_WRITEERROR; | result = FDCBIOS_WRITEERROR; |
| } | } |
| break; | break; |
| Line 563 static REG8 fdd_operate(REG8 type, REG8 | Line 560 static REG8 fdd_operate(REG8 type, REG8 |
| if (fdd_read()) { | if (fdd_read()) { |
| break; | break; |
| } | } |
| i286_memx_write(addr, fdc.buf, accesssize); | MEML_WRITE(addr, fdc.buf, accesssize); |
| addr += accesssize; | addr += accesssize; |
| size -= accesssize; | size -= accesssize; |
| mtr_r += accesssize; // ver0.26 | mtr_r += accesssize; |
| if (fdc.R++ == (UINT8)para) { | if (fdc.R++ == (UINT8)para) { |
| if ((CPU_AH & 0x80) && (!fdc.hd)) { | if ((CPU_AH & 0x80) && (!fdc.hd)) { |
| fdc.hd = 1; | fdc.hd = 1; |
| Line 604 static REG8 fdd_operate(REG8 type, REG8 | Line 601 static REG8 fdd_operate(REG8 type, REG8 |
| } | } |
| #endif | #endif |
| else { | else { |
| ret_ah = fddlasterror; // 0xc0; // ver0.28 | ret_ah = fddlasterror; // 0xc0; |
| result = FDCBIOS_READERROR; | result = FDCBIOS_READERROR; |
| } | } |
| break; | break; |
| Line 616 static REG8 fdd_operate(REG8 type, REG8 | Line 613 static REG8 fdd_operate(REG8 type, REG8 |
| break; | break; |
| case 0x0a: // READ ID | case 0x0a: // READ ID |
| fdc.mf = CPU_AH & 0x40; // ver0.29 | fdc.mf = CPU_AH & 0x40; |
| if (CPU_AH & 0x10) { // ver0.28 | if (CPU_AH & 0x10) { |
| if (!biosfd_seek(CPU_CL, ndensity)) { | if (!biosfd_seek(CPU_CL, ndensity)) { |
| result = FDCBIOS_SEEKSUCCESS; | result = FDCBIOS_SEEKSUCCESS; |
| } | } |
| Line 628 static REG8 fdd_operate(REG8 type, REG8 | Line 625 static REG8 fdd_operate(REG8 type, REG8 |
| } | } |
| } | } |
| if (fdd_readid()) { | if (fdd_readid()) { |
| ret_ah = fddlasterror; // 0xa0; // ver0.28 | ret_ah = fddlasterror; // 0xa0; |
| break; | break; |
| } | } |
| if (fdc.N < 8) { // ver0.26 | if (fdc.N < 8) { |
| mtr_r += 128 << fdc.N; | mtr_r += 128 << fdc.N; |
| } | } |
| else { | else { |
| Line 664 static REG8 fdd_operate(REG8 type, REG8 | Line 661 static REG8 fdd_operate(REG8 type, REG8 |
| fdd_formatinit(); | fdd_formatinit(); |
| pos = CPU_BP; | pos = CPU_BP; |
| for (s=0; s<fdc.sc; s++) { | for (s=0; s<fdc.sc; s++) { |
| i286_memstr_read(CPU_ES, pos, ID, 4); | MEML_READSTR(CPU_ES, pos, ID, 4); |
| fdd_formating(ID); | fdd_formating(ID); |
| pos += 4; | pos += 4; |
| if (ID[3] < 8) { | if (ID[3] < 8) { |
| Line 676 static REG8 fdd_operate(REG8 type, REG8 | Line 673 static REG8 fdd_operate(REG8 type, REG8 |
| } | } |
| ret_ah = 0x00; | ret_ah = 0x00; |
| break; | break; |
| case 0x0e: // ver0.78 | |
| if (CPU_AH & 0x80) { // 密度設定 | |
| mem[fmode] &= 0x0f; | |
| mem[fmode] |= (UINT8)((CPU_AH & 0x0f) << 4); | |
| } | |
| else { // 面設定 | |
| mem[fmode] &= 0xf0; | |
| mem[fmode] |= (UINT8)(CPU_AH & 0x0f); | |
| } | |
| ret_ah = 0x00; | |
| break; | |
| } | } |
| fdd_int(result); | fdd_int(result); |
| fddmtr_seek(fdc.us, mtr_c, mtr_r); | if (mtr_c != fdc.ncn) { |
| fddmtr_seek(fdc.us, mtr_c, mtr_r); | |
| } | |
| return(ret_ah); | return(ret_ah); |
| } | } |
| Line 738 static UINT16 boot_fd1(REG8 type, REG8 r | Line 749 static UINT16 boot_fd1(REG8 type, REG8 r |
| return(bootseg); | return(bootseg); |
| } | } |
| static UINT16 boot_fd(REG8 drv, REG8 type) { // ver0.27 | static UINT16 boot_fd(REG8 drv, REG8 type) { |
| UINT16 bootseg; | UINT16 bootseg; |
| Line 767 static UINT16 boot_fd(REG8 drv, REG8 typ | Line 778 static UINT16 boot_fd(REG8 drv, REG8 typ |
| return(bootseg); | return(bootseg); |
| } | } |
| } | } |
| if (type & 2) { // ver0.29 | if (type & 2) { |
| // 2DD | // 2DD |
| bootseg = boot_fd1(0, 0); | bootseg = boot_fd1(0, 0); |
| if (bootseg) { | if (bootseg) { |
| mem[MEMB_DISK_BOOT] = (BYTE)(0x70 + drv); | mem[MEMB_DISK_BOOT] = (UINT8)(0x70 + drv); |
| fddbios_equip(0, TRUE); | fddbios_equip(0, TRUE); |
| return(bootseg); | return(bootseg); |
| } | } |
| Line 793 static REG16 boot_hd(REG8 drv) { | Line 804 static REG16 boot_hd(REG8 drv) { |
| REG16 bootstrapload(void) { | REG16 bootstrapload(void) { |
| BYTE i; | UINT8 i; |
| REG16 bootseg; | REG16 bootseg; |
| // fdmode = 0; | // fdmode = 0; |
| Line 860 void bios0x1b(void) { | Line 871 void bios0x1b(void) { |
| REG8 ret_ah; | REG8 ret_ah; |
| REG8 flag; | REG8 flag; |
| #if defined(SUPPORT_SCSI) | |
| if ((CPU_AL & 0xf0) == 0xc0) { | |
| TRACEOUT(("%.4x:%.4x AX=%.4x BX=%.4x CX=%.4x DX=%.4 ES=%.4x BP=%.4x", | |
| i286_memword_read(CPU_SS, CPU_SP+2), | |
| i286_memword_read(CPU_SS, CPU_SP), | |
| CPU_AX, CPU_BX, CPU_CX, CPU_DX, CPU_ES, CPU_BP)); | |
| scsicmd_bios(); | |
| return; | |
| } | |
| #endif | |
| #if 1 // bypass to disk bios | #if 1 // bypass to disk bios |
| { | |
| REG8 seg; | REG8 seg; |
| UINT sp; | UINT sp; |
| seg = mem[0x004b0 + (CPU_AL >> 4)]; | seg = mem[MEMX_DISK_XROM + (CPU_AL >> 4)]; |
| if (seg) { | if (seg) { |
| TRACEOUT(("call by %.4x:%.4x", | |
| i286_memword_read(CPU_SS, CPU_SP+2), | |
| i286_memword_read(CPU_SS, CPU_SP))); | |
| sp = CPU_SP; | sp = CPU_SP; |
| i286_memword_write(CPU_SS, sp - 2, CPU_DS); | MEML_WRITE16(CPU_SS, sp - 2, CPU_DS); |
| i286_memword_write(CPU_SS, sp - 4, CPU_SI); | MEML_WRITE16(CPU_SS, sp - 4, CPU_SI); |
| i286_memword_write(CPU_SS, sp - 6, CPU_DI); | MEML_WRITE16(CPU_SS, sp - 6, CPU_DI); |
| i286_memword_write(CPU_SS, sp - 8, CPU_ES); // +a | MEML_WRITE16(CPU_SS, sp - 8, CPU_ES); // +a |
| i286_memword_write(CPU_SS, sp - 10, CPU_BP); // +8 | MEML_WRITE16(CPU_SS, sp - 10, CPU_BP); // +8 |
| i286_memword_write(CPU_SS, sp - 12, CPU_DX); // +6 | MEML_WRITE16(CPU_SS, sp - 12, CPU_DX); // +6 |
| i286_memword_write(CPU_SS, sp - 14, CPU_CX); // +4 | MEML_WRITE16(CPU_SS, sp - 14, CPU_CX); // +4 |
| i286_memword_write(CPU_SS, sp - 16, CPU_BX); // +2 | MEML_WRITE16(CPU_SS, sp - 16, CPU_BX); // +2 |
| i286_memword_write(CPU_SS, sp - 18, CPU_AX); // +0 | MEML_WRITE16(CPU_SS, sp - 18, CPU_AX); // +0 |
| #if 0 | |
| TRACEOUT(("call by %.4x:%.4x", | |
| MEML_READ16(CPU_SS, CPU_SP+2), | |
| MEML_READ16(CPU_SS, CPU_SP))); | |
| TRACEOUT(("bypass to %.4x:0018", seg << 8)); | TRACEOUT(("bypass to %.4x:0018", seg << 8)); |
| TRACEOUT(("AX=%04x BX=%04x %02x:%02x:%02x:%02x ES=%04x BP=%04x", | TRACEOUT(("AX=%04x BX=%04x %02x:%02x:%02x:%02x ES=%04x BP=%04x", |
| CPU_AX, CPU_BX, CPU_CL, CPU_DH, CPU_DL, CPU_CH, | CPU_AX, CPU_BX, CPU_CL, CPU_DH, CPU_DL, CPU_CH, |
| CPU_ES, CPU_BP)); | CPU_ES, CPU_BP)); |
| #endif | |
| sp -= 18; | sp -= 18; |
| CPU_SP = sp; | CPU_SP = sp; |
| CPU_BP = sp; | CPU_BP = sp; |
| Line 905 void bios0x1b(void) { | Line 906 void bios0x1b(void) { |
| CPU_IP = 0x18; | CPU_IP = 0x18; |
| return; | return; |
| } | } |
| } | #endif |
| #if defined(SUPPORT_SCSI) | |
| if ((CPU_AL & 0xf0) == 0xc0) { | |
| TRACEOUT(("%.4x:%.4x AX=%.4x BX=%.4x CX=%.4x DX=%.4 ES=%.4x BP=%.4x", | |
| MEML_READ16(CPU_SS, CPU_SP+2), | |
| MEML_READ16(CPU_SS, CPU_SP), | |
| CPU_AX, CPU_BX, CPU_CX, CPU_DX, CPU_ES, CPU_BP)); | |
| scsicmd_bios(); | |
| return; | |
| } | |
| #endif | #endif |
| switch(CPU_AL & 0xf0) { | switch(CPU_AL & 0xf0) { |
| case 0x90: | case 0x90: |
| ret_ah = fdd_operate(3, 0, 0); | ret_ah = fdd_operate(3, 0, FALSE); |
| break; | break; |
| case 0x30: | case 0x30: |
| case 0xb0: | case 0xb0: |
| ret_ah = fdd_operate(3, 1, 0); | ret_ah = fdd_operate(3, 1, FALSE); |
| break; | break; |
| case 0x10: | case 0x10: |
| ret_ah = fdd_operate(1, 0, 0); | ret_ah = fdd_operate(1, 0, FALSE); |
| break; | break; |
| case 0x70: | case 0x70: |
| case 0xf0: | case 0xf0: |
| ret_ah = fdd_operate(0, 0, 0); | ret_ah = fdd_operate(0, 0, FALSE); |
| break; | break; |
| case 0x50: | case 0x50: |
| ret_ah = fdd_operate(0, 0, 1); | ret_ah = fdd_operate(0, 0, TRUE); |
| break; | break; |
| case 0x00: | case 0x00: |
| Line 950 void bios0x1b(void) { | Line 961 void bios0x1b(void) { |
| #if 0 | #if 0 |
| TRACEOUT(("%04x:%04x AX=%04x BX=%04x %02x:%02x:%02x:%02x\n" \ | TRACEOUT(("%04x:%04x AX=%04x BX=%04x %02x:%02x:%02x:%02x\n" \ |
| "ES=%04x BP=%04x \nret=%02x", | "ES=%04x BP=%04x \nret=%02x", |
| i286_memword_read(CPU_SS, CPU_SP+2), | MEML_READ16(CPU_SS, CPU_SP+2), |
| i286_memword_read(CPU_SS, CPU_SP), | MEML_READ16(CPU_SS, CPU_SP), |
| CPU_AX, CPU_BX, CPU_CL, CPU_DH, CPU_DL, CPU_CH, | CPU_AX, CPU_BX, CPU_CL, CPU_DH, CPU_DL, CPU_CH, |
| CPU_ES, CPU_BP, ret_ah)); | CPU_ES, CPU_BP, ret_ah)); |
| #endif | #endif |
| CPU_AH = ret_ah; | CPU_AH = ret_ah; |
| flag = i286_membyte_read(CPU_SS, CPU_SP+4) & 0xfe; | flag = MEML_READ8(CPU_SS, CPU_SP+4) & 0xfe; |
| if (ret_ah >= 0x20) { | if (ret_ah >= 0x20) { |
| flag += 1; | flag += 1; |
| } | } |
| i286_membyte_write(CPU_SS, CPU_SP + 4, flag); | MEML_WRITE8(CPU_SS, CPU_SP + 4, flag); |
| } | |
| UINT bios0x1b_wait(void) { | |
| UINT addr; | |
| REG8 bit; | |
| if (fddmtr.busy) { | |
| CPU_REMCLOCK = -1; | |
| } | |
| else { | |
| if (fdc.chgreg & 1) { | |
| addr = MEMB_DISK_INTL; | |
| bit = 0x01; | |
| } | |
| else { | |
| addr = MEMB_DISK_INTH; | |
| bit = 0x10; | |
| } | |
| bit <<= fdc.us; | |
| if (mem[addr] & bit) { | |
| mem[addr] &= ~bit; | |
| return(0); | |
| } | |
| else { | |
| CPU_REMCLOCK -= 1000; | |
| } | |
| } | |
| CPU_IP--; | |
| return(1); | |
| } | } |