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| version 1.16, 2004/08/18 08:08:13 | 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" |
| Line 6 | Line 10 |
| #include "ievent.h" | #include "ievent.h" |
| #if defined(TRACE) && defined(CTCCOUNTER) | |
| extern UINT ctccnt; | |
| #endif | |
| static SINT32 minclock(const CTCCH *ch) { | static SINT32 minclock(const CTCCH *ch) { |
| UINT32 event; | UINT32 event; |
| Line 42 static REG8 ctcwork(CTCCH *ch) { | Line 50 static REG8 ctcwork(CTCCH *ch) { |
| SINT32 pulse; | SINT32 pulse; |
| SINT32 count; | SINT32 count; |
| #if defined(TRACE) && defined(CTCCOUNTER) | |
| ctccnt++; | |
| #endif | |
| baseclock = CPU_CLOCK + CPU_BASECLOCK - CPU_REMCLOCK; | baseclock = CPU_CLOCK + CPU_BASECLOCK - CPU_REMCLOCK; |
| stepclock = baseclock - ch->s.baseclock; | stepclock = baseclock - ch->s.baseclock; |
| #if defined(FIX_Z80A) /* 2x2MHz */ | |
| ch->s.baseclock += stepclock & (~1); | |
| stepclock = stepclock >> 1; | |
| #else | |
| stepclock /= pccore.multiple; | stepclock /= pccore.multiple; |
| ch->s.baseclock += stepclock * pccore.multiple; | ch->s.baseclock += stepclock * pccore.multiple; |
| #endif | |
| intr = 0; | intr = 0; |
| pulse3 = 0; | pulse3 = 0; |
| // 0 | /* 0 */ |
| if (!(ch->s.cmd[0] & 0x02)) { | if (!(ch->s.cmd[0] & 0x02)) { |
| pulse = stepclock; | pulse = stepclock; |
| count = ch->s.count[0]; | count = ch->s.count[0]; |
| count -= pulse; | count -= pulse; |
| if (count <= 0) { | 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 = (0 - count) / ch->s.countmax[0]; |
| pulse3 += 1; | pulse3 += 1; |
| count += pulse3 * ch->s.countmax[0]; | count += pulse3 * ch->s.countmax[0]; |
| #endif | |
| intr |= (ch->s.cmd[0] & 0x80) >> (7 - 0); | intr |= (ch->s.cmd[0] & 0x80) >> (7 - 0); |
| } | } |
| ch->s.count[0] = count; | ch->s.count[0] = count; |
| } | } |
| // 3 | /* 3 */ |
| if (!(ch->s.cmd[3] & 0x02)) { | if (!(ch->s.cmd[3] & 0x02)) { |
| if (!(ch->s.cmd[3] & 0x40)) { | if (!(ch->s.cmd[3] & 0x40)) { |
| pulse3 = stepclock; | pulse3 = stepclock; |
| Line 72 static REG8 ctcwork(CTCCH *ch) { | Line 99 static REG8 ctcwork(CTCCH *ch) { |
| count = ch->s.count[3]; | count = ch->s.count[3]; |
| count -= pulse3; | count -= pulse3; |
| if (count <= 0) { | 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]); | count = ch->s.countmax[3] - ((0 - count) % ch->s.countmax[3]); |
| #endif | |
| intr |= (ch->s.cmd[3] & 0x80) >> (7 - 3); | 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; | ch->s.count[3] = count; |
| } | } |
| // 1 | /* 1 */ |
| if (!(ch->s.cmd[1] & 0x02)) { | if (!(ch->s.cmd[1] & 0x02)) { |
| pulse = stepclock; | pulse = stepclock; |
| count = ch->s.count[1]; | count = ch->s.count[1]; |
| Line 90 static REG8 ctcwork(CTCCH *ch) { | Line 129 static REG8 ctcwork(CTCCH *ch) { |
| ch->s.count[1] = count; | ch->s.count[1] = count; |
| } | } |
| // 2 | /* 2 */ |
| if (!(ch->s.cmd[2] & 0x02)) { | if (!(ch->s.cmd[2] & 0x02)) { |
| pulse = stepclock; | pulse = stepclock; |
| count = ch->s.count[2]; | count = ch->s.count[2]; |
| Line 122 static void ctcnextevent(CTCCH *ch) { | Line 161 static void ctcnextevent(CTCCH *ch) { |
| if (ch->s.intr) { | if (ch->s.intr) { |
| return; | return; |
| } | } |
| #if defined(FIX_Z80A) | |
| event = minclock(ch) * 2; | |
| #else | |
| event = minclock(ch) * pccore.multiple; | event = minclock(ch) * pccore.multiple; |
| #endif | |
| nevent_set(NEVENT_CTC0 + ch->s.num, event, neitem_ctc, NEVENT_ABSOLUTE); | nevent_set(NEVENT_CTC0 + ch->s.num, event, neitem_ctc, NEVENT_ABSOLUTE); |
| } | } |
| Line 155 BRESULT ieitem_ctc(UINT id) { | Line 198 BRESULT ieitem_ctc(UINT id) { |
| intr |= ch->s.intr; | intr |= ch->s.intr; |
| r = FALSE; | r = FALSE; |
| if (intr) { | if (intr) { |
| #if 1 | |
| for (i=0, bit=1; i<4; i++, bit<<=1) | for (i=0, bit=1; i<4; i++, bit<<=1) |
| // for (i=4, bit=8; i--; bit>>=1) | #else /* 1 */ |
| for (i=4, bit=8; i--; bit>>=1) | |
| #endif /* 1 */ | |
| { | { |
| if (intr & bit) { | if (intr & bit) { |
| if (!(ch->s.cmd[i] & 0x80)) { | if (!(ch->s.cmd[i] & 0x80)) { |
| Line 166 BRESULT ieitem_ctc(UINT id) { | Line 212 BRESULT ieitem_ctc(UINT id) { |
| r = TRUE; | r = TRUE; |
| intr ^= bit; | intr ^= bit; |
| ch->s.irq = (UINT8)i; | ch->s.irq = (UINT8)i; |
| // TRACEOUT(("ctc int %d %d [%.2x]", ch->s.num, i, ch->s.cmd[i])); | /* TRACEOUT(("ctc int %d %d [%.2x]", ch->s.num, i, ch->s.cmd[i])); */ |
| Z80_INTERRUPT((REG8)(ch->s.vector + (i << 1))); | Z80_INTERRUPT((REG8)(ch->s.vector + (i << 1))); |
| } | } |
| } | } |
| Line 191 void ieeoi_ctc(UINT id) { | Line 237 void ieeoi_ctc(UINT id) { |
| ch = ctc.ch + (id - IEVENT_CTC0); | ch = ctc.ch + (id - IEVENT_CTC0); |
| intr = ctcwork(ch) | ch->s.intr; | intr = ctcwork(ch) | ch->s.intr; |
| curirq = ch->s.irq; | curirq = ch->s.irq; |
| if (intr & (1 << curirq)) { // 割り込み中に割り込んだ… | if (intr & (1 << curirq)) { /* 割り込み中に割り込んだ… */ |
| // カウンタが0でなければ割り込みを消す | /* 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]) | if ((ch->s.countmax[curirq] - ch->s.count[curirq]) |
| >= ch->s.range[curirq]) { | >= ch->s.range[curirq]) { |
| intr ^= (1 << curirq); | intr ^= (1 << curirq); |
| Line 208 void ieeoi_ctc(UINT id) { | Line 254 void ieeoi_ctc(UINT id) { |
| } | } |
| // ---- | /* ---- */ |
| static void ctcch_o(CTCCH *ch, UINT port, REG8 value) { | static void ctcch_o(CTCCH *ch, UINT port, REG8 value) { |
| Line 241 static void ctcch_o(CTCCH *ch, UINT port | Line 287 static void ctcch_o(CTCCH *ch, UINT port |
| ch->s.cmd[port] = value; | ch->s.cmd[port] = value; |
| ctcnextevent(ch); | ctcnextevent(ch); |
| } | } |
| else if (!port) { // ver0.25 | else if (!port) { /* ver0.25 */ |
| ch->s.vector = (UINT8)(value & 0xf8); | ch->s.vector = (UINT8)(value & 0xf8); |
| } | } |
| } | } |
| Line 259 static REG8 ctcch_i(CTCCH *ch, UINT port | Line 305 static REG8 ctcch_i(CTCCH *ch, UINT port |
| } | } |
| // ---- | /* ---- */ |
| static CTCCH *getctcch(UINT port) { | static CTCCH *getctcch(UINT port) { |
| Line 280 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 301 REG8 IOINPCALL ctc_i(UINT port) { | Line 347 REG8 IOINPCALL ctc_i(UINT port) { |
| } | } |
| // ---- | /* ---- */ |
| void ctc_reset(void) { | void ctc_reset(void) { |