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fixed interrupts

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fixed Hcounter
This commit is contained in:
ekeeke31 2007-08-11 17:32:50 +00:00
parent ddcdc3c4ee
commit 9f58e7bf8b
4 changed files with 30 additions and 46 deletions
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15
source/genesis.c
View File

@ -167,18 +167,3 @@ int z80_irq_callback (int param)
z80_set_irq_line (0, CLEAR_LINE);
return 0xFF;
}
int vdp_int_ack_callback (int int_level)
{
switch (int_level)
{
case 4:
hint_pending = 0;
vint_pending = 0;
break;
case 6:
vint_pending = 0;
break;
}
return M68K_INT_ACK_AUTOVECTOR;
}

15
source/hvc.h
View File

@ -181,7 +181,7 @@ uint16 vc_pal_240[313] = {
*/
/*
uint8 cycle2hc32[488] = {
0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x05,
0x05, 0x05, 0x06, 0x06, 0x07, 0x07, 0x07, 0x08, 0x08, 0x08, 0x09, 0x09, 0x09, 0x0A, 0x0A, 0x0A,
@ -216,9 +216,9 @@ uint8 cycle2hc32[488] = {
0xF7, 0xF8, 0xF8, 0xF8, 0xF9, 0xF9, 0xF9, 0xFA, 0xFA, 0xFA, 0xFB, 0xFB, 0xFB, 0xFC, 0xFC, 0xFD,
0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF
};
*/
uint8 cycle2hc32[489] = {
/*uint8 cycle2hc32[489] = {
0xe8, 0xe8, 0xe8, 0xe9, 0xe9, 0xe9, 0xea, 0xea, 0xea, 0xeb, 0xeb, 0xeb, 0xec, 0xec, 0xec, 0xed,
0xed, 0xed, 0xee, 0xee, 0xee, 0xef, 0xef, 0xf0, 0xf0, 0xf0, 0xf1, 0xf1, 0xf1, 0xf2, 0xf2, 0xf2,
0xf3, 0xf3, 0xf3, 0xf4, 0xf4, 0xf4, 0xf5, 0xf5, 0xf5, 0xf6, 0xf6, 0xf6, 0xf7, 0xf7, 0xf8, 0xf8,
@ -252,7 +252,7 @@ uint8 cycle2hc32[489] = {
0x8f, 0x8f, 0x8f, 0x90, 0x90, 0x90, 0x91, 0x91, 0x92
};
*/
/*
uint8 cycle2hc32[489] = {
0xe9, 0xe9, 0xe9, 0xea, 0xea, 0xea, 0xeb, 0xeb, 0xeb, 0xec, 0xec, 0xec, 0xed, 0xed, 0xed, 0xee,
@ -289,7 +289,7 @@ uint8 cycle2hc32[489] = {
};*/
/*
uint8 cycle2hc40[488] = {
0x00, 0x00, 0x00, 0x01, 0x01, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04, 0x04, 0x05, 0x05, 0x06, 0x06,
0x06, 0x07, 0x07, 0x08, 0x08, 0x09, 0x09, 0x09, 0x0A, 0x0A, 0x0B, 0x0B, 0x0C, 0x0C, 0x0C, 0x0D,
@ -323,8 +323,9 @@ uint8 cycle2hc40[488] = {
0xEE, 0xEF, 0xEF, 0xF0, 0xF0, 0xF1, 0xF1, 0xF1, 0xF2, 0xF2, 0xF3, 0xF3, 0xF4, 0xF4, 0xF4, 0xF5,
0xF5, 0xF6, 0xF6, 0xF7, 0xF7, 0xF7, 0xF8, 0xF8, 0xF9, 0xF9, 0xFA, 0xFA, 0xFB, 0xFB, 0xFB, 0xFC,
0xFC, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF
};*/
};
/*
uint8 cycle2hc40[489] = {
0xe4, 0xe4, 0xe4, 0xe5, 0xe5, 0xe6, 0xe6, 0xe7, 0xe7, 0xe7, 0xe8, 0xe8, 0xe9, 0xe9, 0xea, 0xea,
0xea, 0xeb, 0xeb, 0xec, 0xec, 0xed, 0xed, 0xed, 0xee, 0xee, 0xef, 0xef, 0xf0, 0xf0, 0xf0, 0xf1,
@ -358,7 +359,7 @@ uint8 cycle2hc40[489] = {
0xab, 0xac, 0xac, 0xac, 0xad, 0xad, 0xae, 0xae, 0xaf, 0xaf, 0xaf, 0xb0, 0xb0, 0xb1, 0xb1, 0xb2,
0xb2, 0xb2, 0xb3, 0xb3, 0xb4, 0xb4, 0xb5, 0xb5, 0xb6
};
*/
/*
uint8 cycle2hc40[489] = {
0xe4, 0xe4, 0xe4, 0xe5, 0xe5, 0xe6, 0xe6, 0xe6, 0xe7, 0xe7, 0xe8, 0xe8, 0xe9, 0xe9, 0xe9, 0xea,

27
source/system.c
View File

@ -40,11 +40,18 @@ uint8 alttiming = 0;
void m68k_run (int cyc)
{
int cyc_do = cyc - count_m68k; /* cycles remaining to run for the line */
/* cycles remaining to run for the line */
int cyc_do = cyc - count_m68k;
/* 68k is not frozen */
if (cyc_do > 0)
{
m68k_execute(cyc_do);
/* interrupt handling */
if (vint_pending && (reg[1] & 0x20)) m68k_set_irq(6);
else if (hint_pending && (reg[0] & 0x10)) m68k_set_irq(4);
if (cyc_do > 0) m68k_execute(cyc_do);
count_m68k += cyc_do;
vint_pending = 0;
}
}
@ -64,7 +71,7 @@ void m68k_freeze(int cycles)
/* end of 68k execution */
m68ki_remaining_cycles = 0;
/* extra cycles are burned at next execution */
/* extra cycles to be burned at next execution */
count_m68k += extra_cycles;
}
else m68ki_remaining_cycles -= cycles; /* we burn some 68k cycles */
@ -242,12 +249,13 @@ int system_frame (int do_skip)
{
h_counter = reg[10];
hint_pending = 1;
if(reg[0] & 0x10) m68k_set_irq(4);
if (alttiming) m68k_run(aim_m68k - 456); /* fix Legend of Galahad */
}
}
/* Render a line of the display if needed */
if (do_skip == 0 && !alttiming)
if (do_skip == 0)
{
if (v_counter < frame_end) render_line(v_counter);
if (v_counter < (frame_end-1)) parse_satb(0x81 + v_counter);
@ -258,12 +266,6 @@ int system_frame (int do_skip)
m68k_run(aim_m68k - 404);
status &= 0xFFFB; // HBlank = 0
if (do_skip == 0 && alttiming) /* hack for Legend of Galahad and Road Rash serie (one-line glitch)*/
{
if (v_counter < frame_end) render_line(v_counter);
if (v_counter < (frame_end-1)) parse_satb(0x81 + v_counter);
}
if (v_counter == frame_end)
{
/* V Retrace */
@ -273,9 +275,8 @@ int system_frame (int do_skip)
else count_z80 = aim_z80 - 168;
/* V Int */
vint_pending = 1;
status |= 0x0080;
vint_pending = 1;
if (reg[1] & 0x20) m68k_set_irq(6);
/* Z Int */
if (zreset == 1 && zbusreq == 0)

19
source/vdp.c
View File

@ -470,21 +470,10 @@ void vdp_reg_w (uint8 r, uint8 d)
switch (r)
{
case 0x00: /* CTRL #1 */
if (vint_pending && (reg[1] & 0x20)) m68k_set_irq (6);
else if (hint_pending && (d & 0x10)) m68k_set_irq (4);
else m68k_set_irq (0);
if (!(d & 0x02)) hc_latch = -1;
break;
case 0x01: /* CTRL #2 */
if (vint_pending && (d & 0x20))
{
if (irqtiming) m68k_run(count_m68k + 24); /* hack for Sesame's Street */
m68k_set_irq (6);
}
else if (hint_pending && (reg[0] & 0x10)) m68k_set_irq (4); /* fix Lemmings status bar */
else m68k_set_irq (0);
/* Change the frame timing */
frame_end = (d & 8) ? 0xF0 : 0xE0;
@ -598,3 +587,11 @@ uint16 vdp_hvc_r (void)
void vdp_test_w (uint16 value)
{}
int vdp_int_ack_callback (int int_level)
{
if (vint_pending) vint_pending = 0;
else hint_pending = 0;
if (!hint_pending && !vint_pending) m68k_set_irq(0);
return M68K_INT_ACK_AUTOVECTOR;
}