| version 1.1, 2004/08/01 05:31:30 | version 1.18, 2008/06/02 20:07:31 | 
| 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); | 
|  | } | 
|  |  | 
|  | static REG8 ctcwork(CTCCH *ch) { | 
|  |  | 
|  | UINT32  baseclock; | 
|  | SINT32  stepclock; | 
|  | REG8    intr; | 
|  | SINT32  pulse3; | 
|  | SINT32  pulse; | 
|  | SINT32  count; | 
|  |  | 
|  | #if defined(TRACE) && defined(CTCCOUNTER) | 
|  | ctccnt++; | 
|  | #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) { | 
 |  |  | 
| ctcint_flg = Z80_ABLEINTERRUPT(); | UINT32  event; | 
 |  |  | 
| clk4 = pccore.HSYNC_CLK; | if (ch->s.intr) { | 
| clk2 = clk4 >> 1; | 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; | 
 |  |  | 
| if (pccore.ROM_TYPE >= 2) { | ch = ctc.ch + (id - NEVENT_CTC0); | 
| ch = ctc.ch + 0; | intr = ctcwork(ch); | 
| r = 3; | 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; | 
| Z80_INT((REG8)(ch->vector + (i << 1))); | 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 */ | 
| } | if ((ch->s.countmax[curirq] - ch->s.count[curirq]) | 
| bit <<= 1; | >= ch->s.range[curirq]) { | 
|  | 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) { | 
 |  |  | 
 | UINT    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 157  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)); */ | 
 | ch = getctcch(port); | ch = getctcch(port); | 
 | if (ch != NULL) { | if (ch != NULL) { | 
 | ctcch_o(ch, port, value); | ctcch_o(ch, port, value); | 
| Line 172  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; | 
 | } | } | 
 | } | } | 
 | } | } |