xmil/io/ctc.c - diff

Return to ctc.c CVS log

Up to [RetroPC.NET] / xmil / io

Diff for /xmil/io/ctc.c between versions 1.7 and 1.8

version 1.7, 2004/08/11 16:09:04	version 1.8, 2004/08/13 01:35:59
Line 6	Line 6
#include "ievent.h"	#include "ievent.h"


	static SINT32 minclock(const CTCCH *ch) {

	UINT32 event;
	UINT i;
	UINT32 clock;

	event = 0x01000000;
	for (i=0; i<3; i++) {
	if ((ch->cmd[i] & 0x82) == 0x80) {
	clock = ch->count[i];
	if (ch->cmd[i] & 0x40) {
	clock = clock * 2;
	}
	event = min(event, clock);
	}
	}
	if ((ch->cmd[3] & 0x82) == 0x80) {
	clock = ch->count[3];
	if (ch->cmd[3] & 0x40) {
	clock = (clock - 1) * ch->countmax[0];
	clock += ch->count[0];
	if (ch->cmd[0] & 0x40) {
	clock = clock * 2;
	}
	}
	event = min(event, clock);
	}
	event = event / 2;
	if (event == 0) {
	event = 1;
	}
	return(event);
	}

static REG8 ctcwork(CTCCH *ch) {	static REG8 ctcwork(CTCCH *ch) {

UINT32 baseclock;	UINT32 baseclock;
Line 100 static void ctcstep(CTCCH *ch) {	Line 134 static void ctcstep(CTCCH *ch) {
static void ctcnextevent(CTCCH *ch) {	static void ctcnextevent(CTCCH *ch) {

UINT32 event;	UINT32 event;
UINT i;
UINT32 clock;

if (ch->intr) {	if (ch->intr) {
return;	return;
}	}
event = 0x01000000;	event = minclock(ch) * pccore.multiple;
for (i=0; i<3; i++) {
if ((ch->cmd[i] & 0x82) == 0x80) {
clock = ch->count[i];
if (ch->cmd[i] & 0x40) {
clock = clock * 2;
}
event = min(event, clock);
}
}
if ((ch->cmd[3] & 0x82) == 0x80) {
clock = ch->count[3];
if (ch->cmd[3] & 0x40) {
clock = (clock - 1) * ch->countmax[0];
clock += ch->count[0];
if (ch->cmd[0] & 0x40) {
clock = clock * 2;
}
}
event = min(event, clock);
}
event *= pccore.multiple;
event /= 2;
if (event == 0) {
event = 1;
}
nevent_set(NEVENT_CTC0 + ch->num, event, neitem_ctc, NEVENT_ABSOLUTE);	nevent_set(NEVENT_CTC0 + ch->num, event, neitem_ctc, NEVENT_ABSOLUTE);
}	}

Line 166 BRESULT ieitem_ctc(UINT id) {	Line 173 BRESULT ieitem_ctc(UINT id) {
if (intr) {	if (intr) {
for (i=0, bit=1; i<4; i++, bit<<=1) {	for (i=0, bit=1; i<4; i++, bit<<=1) {
if (intr & bit) {	if (intr & bit) {
#if 1 // ��Υ��ߥ󥰢��Ȥǽ��	#if 0 // ��Υ��ߥ󥰢��Ȥǽ��
if (0)	if (0)
	#elif 1
	if ((ch->countmax[i] - ch->count[i]) >= 256)
#elif 0	#elif 0
if (((ch->count[i] * 17) >> 4) < ch->countmax[i])	if (((ch->count[i] * 17) >> 4) < ch->countmax[i])
#else	#else
Line 182 BRESULT ieitem_ctc(UINT id) {	Line 191 BRESULT ieitem_ctc(UINT id) {
else if (!r) {	else if (!r) {
r = TRUE;	r = TRUE;
intr ^= bit;	intr ^= bit;
	// TRACEOUT(("ctc int %d", i));
Z80_INTERRUPT((REG8)(ch->vector + (i << 1)));	Z80_INTERRUPT((REG8)(ch->vector + (i << 1)));
}	}
}	}
Line 223 static void ctcch_o(CTCCH *ch, UINT port	Line 233 static void ctcch_o(CTCCH *ch, UINT port
}	}
}	}
count <<= scale;	count <<= scale;
	ch->scale[port] = scale;
ch->countmax[port] = count;	ch->countmax[port] = count;
ch->count[port] = count;	ch->count[port] = count;
ch->cmd[port] &= ~6;	ch->cmd[port] &= ~6;
Line 240 static void ctcch_o(CTCCH *ch, UINT port	Line 251 static void ctcch_o(CTCCH *ch, UINT port

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->basecnt[port]);
}	}
else {	else {
ctcstep(ch);	ctcstep(ch);
scale = 0;	return((REG8)(ch->count[3] >> ch->scale[3]));
if (!(ch->cmd[3] & 0x40)) {
if (ch->cmd[3] & 0x20) {
scale = 8;
}
else {
scale = 4;
}
}
return((REG8)(ch->count[3] >> scale));
}	}
}	}

Line 316 void ctc_reset(void) {	Line 316 void ctc_reset(void) {
ctc.ch[i].num = (UINT8)i;	ctc.ch[i].num = (UINT8)i;
for (j=0; j<4; j++) {	for (j=0; j<4; j++) {
ctc.ch[i].cmd[j] = 0x03;	ctc.ch[i].cmd[j] = 0x03;
	ctc.ch[i].scale[j] = 8;
ctc.ch[i].count[j] = 256 << 8;	ctc.ch[i].count[j] = 256 << 8;
ctc.ch[i].countmax[j] = 256 << 8;	ctc.ch[i].countmax[j] = 256 << 8;
}	}

RetroPC.NET-CVS <cvs@retropc.net>

Removed from v.1.7
changed lines
	Added in v.1.8