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PicoDrive hacks
[picodrive.git]
/
Pico
/
cd
/
Sek.c
diff --git
a/Pico/cd/Sek.c
b/Pico/cd/Sek.c
index
5def9c1
..
f28b142
100644
(file)
--- a/
Pico/cd/Sek.c
+++ b/
Pico/cd/Sek.c
@@
-1,10
+1,4
@@
-// This is part of Pico Library
-
-// (c) Copyright 2004 Dave, All rights reserved.
// (c) Copyright 2006 notaz, All rights reserved.
// (c) Copyright 2006 notaz, All rights reserved.
-// Free for non-commercial use.
-
-// For commercial use, separate licencing terms must be obtained.
#include "../PicoInt.h"
#include "../PicoInt.h"
@@
-23,20
+17,21
@@
struct Cyclone PicoCpuS68k;
m68ki_cpu_core PicoS68kCPU; // Mega CD's CPU
#endif
m68ki_cpu_core PicoS68kCPU; // Mega CD's CPU
#endif
-static int irqs = 0; // TODO: 2 context
+static int new_irq_level(int level)
+{
+ int level_new = 0, irqs;
+ Pico_mcd->m.s68k_pend_ints &= ~(1 << level);
+ irqs = Pico_mcd->m.s68k_pend_ints;
+ irqs &= Pico_mcd->s68k_regs[0x33];
+ while ((irqs >>= 1)) level_new++;
+ return level_new;
+}
#ifdef EMU_M68K
#ifdef EMU_M68K
-static int SekIntAckS68k(int level)
+static int SekIntAckS68k
M
(int level)
{
{
- int level_new = 0;
- irqs &= ~(1 << level);
- irqs &= Pico_mcd->s68k_regs[0x33];
- if (irqs) {
- level_new = 6;
- while (level_new > 0) { if (irqs & (1 << level_new)) break; level_new--; }
- }
-
+ int level_new = new_irq_level(level);
dprintf("s68kACK %i -> %i", level, level_new);
CPU_INT_LEVEL = level_new << 8;
return M68K_INT_ACK_AUTOVECTOR;
dprintf("s68kACK %i -> %i", level, level_new);
CPU_INT_LEVEL = level_new << 8;
return M68K_INT_ACK_AUTOVECTOR;
@@
-45,15
+40,9
@@
static int SekIntAckS68k(int level)
#ifdef EMU_C68K
// interrupt acknowledgment
#ifdef EMU_C68K
// interrupt acknowledgment
-static void SekIntAck(int level)
+static void SekIntAck
S68k
(int level)
{
{
- int level_new = 0;
- irqs &= ~(1 << level);
- irqs &= Pico_mcd->s68k_regs[0x33];
- if (irqs) {
- level_new = 6;
- while (level_new > 0) { if (irqs & (1 << level_new)) break; level_new--; }
- }
+ int level_new = new_irq_level(level);
dprintf("s68kACK %i -> %i", level, level_new);
PicoCpuS68k.irq = level_new;
dprintf("s68kACK %i -> %i", level, level_new);
PicoCpuS68k.irq = level_new;
@@
-82,7
+71,7
@@
int SekInitS68k()
#ifdef EMU_C68K
// CycloneInit();
memset(&PicoCpuS68k,0,sizeof(PicoCpuS68k));
#ifdef EMU_C68K
// CycloneInit();
memset(&PicoCpuS68k,0,sizeof(PicoCpuS68k));
- PicoCpuS68k.IrqCallback=SekIntAck;
+ PicoCpuS68k.IrqCallback=SekIntAck
S68k
;
PicoCpuS68k.ResetCallback=SekResetAck;
PicoCpuS68k.UnrecognizedCallback=SekUnrecognizedOpcode;
#endif
PicoCpuS68k.ResetCallback=SekResetAck;
PicoCpuS68k.UnrecognizedCallback=SekUnrecognizedOpcode;
#endif
@@
-93,7
+82,7
@@
int SekInitS68k()
m68k_set_context(&PicoS68kCPU);
m68k_set_cpu_type(M68K_CPU_TYPE_68000);
m68k_init();
m68k_set_context(&PicoS68kCPU);
m68k_set_cpu_type(M68K_CPU_TYPE_68000);
m68k_init();
- m68k_set_int_ack_callback(SekIntAckS68k);
+ m68k_set_int_ack_callback(SekIntAckS68k
M
);
// m68k_pulse_reset(); // not yet, memmap is not set up
m68k_set_context(oldcontext);
}
// m68k_pulse_reset(); // not yet, memmap is not set up
m68k_set_context(oldcontext);
}
@@
-122,6
+111,8
@@
int SekResetS68k()
void *oldcontext = m68ki_cpu_p;
m68k_set_context(&PicoS68kCPU);
void *oldcontext = m68ki_cpu_p;
m68k_set_context(&PicoS68kCPU);
+ m68ki_cpu.sp[0]=0;
+ m68k_set_irq(0);
m68k_pulse_reset();
m68k_set_context(oldcontext);
}
m68k_pulse_reset();
m68k_set_context(oldcontext);
}
@@
-132,14
+123,18
@@
int SekResetS68k()
int SekInterruptS68k(int irq)
{
int SekInterruptS68k(int irq)
{
- irqs |= 1 << irq;
+ int irqs, real_irq = 1;
+ Pico_mcd->m.s68k_pend_ints |= 1 << irq;
+ irqs = Pico_mcd->m.s68k_pend_ints >> 1;
+ while ((irqs >>= 1)) real_irq++; // this is probably only needed for Cyclone
+
#ifdef EMU_C68K
#ifdef EMU_C68K
- PicoCpuS68k.irq=irq;
+ PicoCpuS68k.irq=
real_
irq;
#endif
#ifdef EMU_M68K
void *oldcontext = m68ki_cpu_p;
m68k_set_context(&PicoS68kCPU);
#endif
#ifdef EMU_M68K
void *oldcontext = m68ki_cpu_p;
m68k_set_context(&PicoS68kCPU);
- m68k_set_irq(irq); // raise irq (gets lowered after taken or must be done in ack)
+ m68k_set_irq(
real_
irq); // raise irq (gets lowered after taken or must be done in ack)
m68k_set_context(oldcontext);
#endif
return 0;
m68k_set_context(oldcontext);
#endif
return 0;