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| version 1.3, 2004/08/05 11:30:12 | version 1.18, 2008/06/02 20:07:31 |
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| Line 1 | Line 1 |
| /* #define CTCCOUNTER */ | |
| #define CTCFAST | |
| #include "compiler.h" | #include "compiler.h" |
| #include "z80core.h" | #include "z80core.h" |
| #include "pccore.h" | #include "pccore.h" |
| #include "iocore.h" | #include "iocore.h" |
| #include "nevent.h" | |
| #include "ievent.h" | |
| void x1_ctc_int(void) { | #if defined(TRACE) && defined(CTCCOUNTER) |
| extern UINT ctccnt; | |
| #endif | |
| CTCCH *ch; | static SINT32 minclock(const CTCCH *ch) { |
| UINT r; | |
| SINT32 clk0; | UINT32 event; |
| SINT32 clk4; | |
| SINT32 clk2; | |
| SINT32 subcnt; | |
| UINT i; | UINT i; |
| REG8 bit; | UINT32 clock; |
| REG8 ctcint_flg; | |
| event = 0x01000000; | |
| for (i=0; i<3; i++) { | |
| if ((ch->s.cmd[i] & 0x82) == 0x80) { | |
| clock = ch->s.count[i]; | |
| event = min(event, clock); | |
| } | |
| } | |
| if ((ch->s.cmd[3] & 0x82) == 0x80) { | |
| clock = ch->s.count[3]; | |
| if (ch->s.cmd[3] & 0x40) { | |
| clock = (clock - 1) * ch->s.countmax[0]; | |
| clock += ch->s.count[0]; | |
| } | |
| event = min(event, clock); | |
| } | |
| if (event == 0) { | |
| event = 1; | |
| } | |
| return(event); | |
| } | |
| ctcint_flg = Z80_ABLEINTERRUPT(); | static REG8 ctcwork(CTCCH *ch) { |
| clk4 = pccore.HSYNC_CLK; | UINT32 baseclock; |
| clk2 = clk4 >> 1; | SINT32 stepclock; |
| REG8 intr; | |
| SINT32 pulse3; | |
| SINT32 pulse; | |
| SINT32 count; | |
| if (pccore.ROM_TYPE >= 2) { | #if defined(TRACE) && defined(CTCCOUNTER) |
| ch = ctc.ch + 0; | ctccnt++; |
| r = 3; | #endif |
| baseclock = CPU_CLOCK + CPU_BASECLOCK - CPU_REMCLOCK; | |
| stepclock = baseclock - ch->s.baseclock; | |
| #if defined(FIX_Z80A) /* 2x2MHz */ | |
| ch->s.baseclock += stepclock & (~1); | |
| stepclock = stepclock >> 1; | |
| #else | |
| stepclock /= pccore.multiple; | |
| ch->s.baseclock += stepclock * pccore.multiple; | |
| #endif | |
| intr = 0; | |
| pulse3 = 0; | |
| /* 0 */ | |
| if (!(ch->s.cmd[0] & 0x02)) { | |
| pulse = stepclock; | |
| count = ch->s.count[0]; | |
| count -= pulse; | |
| if (count <= 0) { | |
| #if defined(CTCFAST) | |
| count += ch->s.countmax[0]; | |
| if (count <= 0) { | |
| pulse3 = (0 - count) / ch->s.countmax[0]; | |
| pulse3 += 1; | |
| count += pulse3 * ch->s.countmax[0]; | |
| } | |
| pulse3 += 1; | |
| #else | |
| pulse3 = (0 - count) / ch->s.countmax[0]; | |
| pulse3 += 1; | |
| count += pulse3 * ch->s.countmax[0]; | |
| #endif | |
| intr |= (ch->s.cmd[0] & 0x80) >> (7 - 0); | |
| } | |
| ch->s.count[0] = count; | |
| } | |
| /* 3 */ | |
| if (!(ch->s.cmd[3] & 0x02)) { | |
| if (!(ch->s.cmd[3] & 0x40)) { | |
| pulse3 = stepclock; | |
| } | |
| count = ch->s.count[3]; | |
| count -= pulse3; | |
| if (count <= 0) { | |
| #if defined(CTCFAST) | |
| count += ch->s.countmax[3]; | |
| if (count <= 0) { | |
| count = ch->s.countmax[3] - ((0 - count) % ch->s.countmax[3]); | |
| } | |
| #else | |
| count = ch->s.countmax[3] - ((0 - count) % ch->s.countmax[3]); | |
| #endif | |
| intr |= (ch->s.cmd[3] & 0x80) >> (7 - 3); | |
| #if 0 | |
| TRACEOUT(("<- ch.3 %.8x [%.2x:%.2x %.2x:%.2x]", baseclock, | |
| ch->s.basecnt[0], ch->s.cmd[0], | |
| ch->s.basecnt[3], ch->s.cmd[3])); | |
| #endif | |
| } | |
| ch->s.count[3] = count; | |
| } | |
| /* 1 */ | |
| if (!(ch->s.cmd[1] & 0x02)) { | |
| pulse = stepclock; | |
| count = ch->s.count[1]; | |
| count -= pulse; | |
| if (count <= 0) { | |
| count = ch->s.countmax[1] - ((0 - count) % ch->s.countmax[1]); | |
| intr |= (ch->s.cmd[1] & 0x80) >> (7 - 1); | |
| } | |
| ch->s.count[1] = count; | |
| } | |
| /* 2 */ | |
| if (!(ch->s.cmd[2] & 0x02)) { | |
| pulse = stepclock; | |
| count = ch->s.count[2]; | |
| count -= pulse; | |
| if (count <= 0) { | |
| count = ch->s.countmax[2] - ((0 - count) % ch->s.countmax[2]); | |
| intr |= (ch->s.cmd[2] & 0x80) >> (7 - 2); | |
| } | |
| ch->s.count[2] = count; | |
| } | |
| return(intr); | |
| } | |
| static void ctcstep(CTCCH *ch) { | |
| REG8 intr; | |
| intr = ctcwork(ch); | |
| if (intr) { | |
| ch->s.intr |= intr; | |
| ievent_set(IEVENT_CTC0 + ch->s.num); | |
| } | |
| } | |
| static void ctcnextevent(CTCCH *ch) { | |
| UINT32 event; | |
| if (ch->s.intr) { | |
| return; | |
| } | |
| #if defined(FIX_Z80A) | |
| event = minclock(ch) * 2; | |
| #else | |
| event = minclock(ch) * pccore.multiple; | |
| #endif | |
| nevent_set(NEVENT_CTC0 + ch->s.num, event, neitem_ctc, NEVENT_ABSOLUTE); | |
| } | |
| void neitem_ctc(UINT id) { | |
| CTCCH *ch; | |
| REG8 intr; | |
| ch = ctc.ch + (id - NEVENT_CTC0); | |
| intr = ctcwork(ch); | |
| if (intr) { | |
| ch->s.intr |= intr; | |
| ievent_set(IEVENT_CTC0 + ch->s.num); | |
| } | } |
| else { | else { |
| ch = ctc.ch + 2; | ctcnextevent(ch); |
| r = 1; | |
| } | } |
| } | |
| do { | BRESULT ieitem_ctc(UINT id) { |
| clk0 = 0; | |
| bit = 1; | CTCCH *ch; |
| for (i=0; i<4; i++) { | REG8 intr; |
| if (!(ch->cmd[i] & 0x02)) { | BRESULT r; |
| if (ch->count[i] <= 0) { | UINT i; |
| ch->count[i] += ch->countmax[i]; | REG8 bit; |
| } | |
| if (!(ch->cmd[i] & 0x40)) { | ch = ctc.ch + (id - IEVENT_CTC0); |
| subcnt = clk4; | intr = ctcwork(ch); |
| } | intr |= ch->s.intr; |
| else if (i == 3) { | r = FALSE; |
| subcnt = clk0; | if (intr) { |
| } | #if 1 |
| else { | for (i=0, bit=1; i<4; i++, bit<<=1) |
| subcnt = clk2; | #else /* 1 */ |
| for (i=4, bit=8; i--; bit>>=1) | |
| #endif /* 1 */ | |
| { | |
| if (intr & bit) { | |
| if (!(ch->s.cmd[i] & 0x80)) { | |
| intr ^= bit; | |
| } | } |
| ch->count[i] -= subcnt; | else if (!r) { |
| if (ch->count[i] <= 0) { | r = TRUE; |
| ch->int_flag |= bit; | intr ^= bit; |
| if (!i) { | ch->s.irq = (UINT8)i; |
| clk0 = 1; | /* TRACEOUT(("ctc int %d %d [%.2x]", ch->s.num, i, ch->s.cmd[i])); */ |
| } | Z80_INTERRUPT((REG8)(ch->s.vector + (i << 1))); |
| } | } |
| } | } |
| bit <<= 1; | |
| } | } |
| } | |
| ch->s.intr = intr; | |
| if (intr) { | |
| ievent_set(IEVENT_CTC0 + ch->s.num); | |
| } | |
| else { | |
| ctcnextevent(ch); | |
| } | |
| return(r); | |
| } | |
| bit = 1; | void ieeoi_ctc(UINT id) { |
| for (i=0; i<4; i++) { | |
| if (ch->int_flag & bit) { | CTCCH *ch; |
| if (!(ch->cmd[i] & 0x80)) { | REG8 intr; |
| ch->int_flag ^= bit; | UINT curirq; |
| } | |
| else if (ctcint_flg) { | ch = ctc.ch + (id - IEVENT_CTC0); |
| ctcint_flg = 0; | intr = ctcwork(ch) | ch->s.intr; |
| ch->int_flag ^= bit; | curirq = ch->s.irq; |
| TRACEOUT(("ctc%u int -- %d", 3 - r, i)); | if (intr & (1 << curirq)) { /* 割り込み中に割り込んだ… */ |
| Z80_INT((REG8)(ch->vector + (i << 1))); | /* カウンタが0でなければ割り込みを消す */ |
| } | if ((ch->s.countmax[curirq] - ch->s.count[curirq]) |
| } | >= ch->s.range[curirq]) { |
| bit <<= 1; | intr ^= (1 << curirq); |
| } | } |
| ch++; | } |
| } while(--r); | ch->s.intr = intr; |
| if (intr) { | |
| ievent_set(id); | |
| } | |
| else { | |
| ctcnextevent(ch); | |
| } | |
| } | } |
| // ---- | /* ---- */ |
| static void ctcch_o(CTCCH *ch, UINT port, REG8 value) { | static void ctcch_o(CTCCH *ch, UINT port, REG8 value) { |
| REG8 scale; | |
| SINT32 count; | SINT32 count; |
| REG8 scale; | |
| port &= 3; | port &= 3; |
| if (ch->cmd[port] & 0x04) { | if (ch->s.cmd[port] & 0x04) { |
| ctcstep(ch); | |
| ch->s.basecnt[port] = value; | |
| count = ((value - 1) & 0xff) + 1; | |
| scale = 0; | scale = 0; |
| count = 256; | if (!(ch->s.cmd[port] & 0x40)) { |
| ch->basecnt[port] = value; | if (ch->s.cmd[port] & 0x20) { |
| if (value) { | scale = 8 - 1; |
| count = (SINT32)value; | |
| } | |
| if (!(ch->cmd[port] & 0x40)) { | |
| if (ch->cmd[port] & 0x20) { | |
| scale = 8; | |
| } | } |
| else { | else { |
| scale = 4; | scale = 4 - 1; |
| } | } |
| } | } |
| count <<= scale; | ch->s.scale[port] = scale; |
| ch->countmax[port] = count; | ch->s.countmax[port] = count << scale; |
| ch->count[port] = count; | ch->s.count[port] = count << scale; |
| ch->cmd[port] &= ~6; | ch->s.range[port] = 1 << scale; |
| ch->s.cmd[port] &= ~6; | |
| ctcnextevent(ch); | |
| } | } |
| else if (value & 1) { | else if (value & 1) { |
| ch->cmd[port] = value; | ctcstep(ch); |
| ch->s.cmd[port] = value; | |
| ctcnextevent(ch); | |
| } | } |
| else if (!port) { // ver0.25 | else if (!port) { /* ver0.25 */ |
| ch->vector = (UINT8)(value & 0xf8); | ch->s.vector = (UINT8)(value & 0xf8); |
| } | } |
| } | } |
| static REG8 ctcch_i(CTCCH *ch, UINT port) { | static REG8 ctcch_i(CTCCH *ch, UINT port) { |
| REG8 scale; | |
| port &= 3; | port &= 3; |
| if (port != 3) { | if (port != 3) { |
| return(ch->basecnt[port]); | return(ch->s.basecnt[port]); |
| } | } |
| else { | else { |
| scale = 0; | ctcstep(ch); |
| if (!(ch->cmd[3] & 0x40)) { | return((REG8)(ch->s.count[3] >> ch->s.scale[3])); |
| if (ch->cmd[3] & 0x20) { | |
| scale = 8; | |
| } | |
| else { | |
| scale = 4; | |
| } | |
| } | |
| return((REG8)(ch->count[3] >> scale)); | |
| } | } |
| } | } |
| // ---- | /* ---- */ |
| static CTCCH *getctcch(UINT port) { | static CTCCH *getctcch(UINT port) { |
| port &= ~3; | port &= ~3; |
| if (port == 0x1fa0) { | if (port == 0x1fa0) { |
| return(ctc.ch + 0); | return(ctc.ch + CTC_TURBO1); |
| } | } |
| if (port == 0x1fa8) { | if (port == 0x1fa8) { |
| return(ctc.ch + 1); | return(ctc.ch + CTC_TURBO2); |
| } | } |
| if ((pccore.SOUND_SW) && (port == 0x0704)) { | if (port == 0x0704) { |
| return(ctc.ch + 2); | return(ctc.ch + CTC_OPM); |
| } | } |
| return(NULL); | return(NULL); |
| } | } |
| Line 158 void IOOUTCALL ctc_o(UINT port, REG8 val | Line 326 void IOOUTCALL ctc_o(UINT port, REG8 val |
| CTCCH *ch; | CTCCH *ch; |
| TRACEOUT(("ctc - %.4x %.2x [%.4x]", port, value, Z80_PC)); | /* TRACEOUT(("ctc - %.4x %.2x [%.4x]", port, value, Z80_PC)); */ |
| ch = getctcch(port); | ch = getctcch(port); |
| if (ch != NULL) { | if (ch != NULL) { |
| ctcch_o(ch, port, value); | ctcch_o(ch, port, value); |
| Line 174 REG8 IOINPCALL ctc_i(UINT port) { | Line 342 REG8 IOINPCALL ctc_i(UINT port) { |
| return(ctcch_i(ch, port)); | return(ctcch_i(ch, port)); |
| } | } |
| else { | else { |
| return((REG8)0xff); | return(0xff); |
| } | } |
| } | } |
| // ---- | /* ---- */ |
| void ctc_reset(void) { | void ctc_reset(void) { |
| UINT i, j; | UINT i; |
| UINT j; | |
| ZeroMemory(&ctc, sizeof(ctc)); | ZeroMemory(&ctc, sizeof(ctc)); |
| for (i=0; i<3; i++) { | for (i=0; i<3; i++) { |
| ctc.ch[i].s.num = (UINT8)i; | |
| for (j=0; j<4; j++) { | for (j=0; j<4; j++) { |
| ctc.ch[i].cmd[j] = 0x83; | ctc.ch[i].s.cmd[j] = 0x23; |
| ctc.ch[i].s.scale[j] = 7; | |
| ctc.ch[i].s.count[j] = 256 << 7; | |
| ctc.ch[i].s.countmax[j] = 256 << 7; | |
| } | } |
| } | } |
| } | } |