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fixed 68k interrupt behavior (prevents interrupts from being executed multiple

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time when 68k is halted)
This commit is contained in:
EkeEke 2013-04-19 16:55:34 +02:00
parent e78d5a7834
commit c9fb127730
2 changed files with 28 additions and 19 deletions
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25
source/m68k/m68kcpu.c
View File

@ -205,9 +205,6 @@ void m68k_update_irq(unsigned int mask)
#ifdef LOGVDP
error("[%d(%d)][%d(%d)] IRQ Level = %d(0x%02x) (%x)\n", v_counter, m68k.cycles/3420, m68k.cycles, m68k.cycles%3420,CPU_INT_LEVEL>>8,FLAG_INT_MASK,m68k_get_reg(M68K_REG_PC));
#endif
/* Check interrupt mask to process IRQ */
m68ki_check_interrupts();
}
void m68k_set_irq(unsigned int int_level)
@ -218,9 +215,6 @@ void m68k_set_irq(unsigned int int_level)
#ifdef LOGVDP
error("[%d(%d)][%d(%d)] IRQ Level = %d(0x%02x) (%x)\n", v_counter, m68k.cycles/3420, m68k.cycles, m68k.cycles%3420,CPU_INT_LEVEL>>8,FLAG_INT_MASK,m68k_get_reg(M68K_REG_PC));
#endif
/* Check interrupt mask to process IRQ */
m68ki_check_interrupts();
}
/* IRQ latency (Fatal Rewind, Sesame's Street Counting Cafe)*/
@ -261,6 +255,15 @@ void m68k_set_irq_delay(unsigned int int_level)
void m68k_run(unsigned int cycles)
{
/* Make sure CPU is not already ahead */
if (m68k.cycles >= cycles)
{
return;
}
/* Check interrupt mask to process IRQ if needed */
m68ki_check_interrupts();
/* Make sure we're not stopped */
if (CPU_STOPPED)
{
@ -268,12 +271,12 @@ void m68k_run(unsigned int cycles)
return;
}
/* Return point for when we have an address error (TODO: use goto) */
m68ki_set_address_error_trap() /* auto-disable (see m68kcpu.h) */
/* Save end cycles count for when CPU is stopped */
m68k.cycle_end = cycles;
/* Return point for when we have an address error (TODO: use goto) */
m68ki_set_address_error_trap() /* auto-disable (see m68kcpu.h) */
#ifdef LOGVDP
error("[%d][%d] m68k run to %d cycles (%x)\n", v_counter, m68k.cycles, cycles, m68k.pc);
#endif
@ -290,8 +293,8 @@ void m68k_run(unsigned int cycles)
REG_IR = m68ki_read_imm_16();
/* Execute instruction */
m68ki_instruction_jump_table[REG_IR](); /* TODO: use labels table with goto */
USE_CYCLES(CYC_INSTRUCTION[REG_IR]); /* TODO: move into instruction handlers */
m68ki_instruction_jump_table[REG_IR]();
USE_CYCLES(CYC_INSTRUCTION[REG_IR]);
/* Trace m68k_exception, if necessary */
m68ki_exception_if_trace(); /* auto-disable (see m68kcpu.h) */

22
source/m68k/s68kcpu.c
View File

@ -215,13 +215,19 @@ void s68k_update_irq(unsigned int mask)
#ifdef LOG_SCD
error("[%d][%d] IRQ Level = %d(0x%02x) (%x)\n", v_counter, s68k.cycles, CPU_INT_LEVEL>>8,FLAG_INT_MASK,s68k.pc);
#endif
/* Check interrupt mask to process IRQ */
m68ki_check_interrupts();
}
void s68k_run(unsigned int cycles)
{
/* Make sure CPU is not already ahead */
if (s68k.cycles >= cycles)
{
return;
}
/* Check interrupt mask to process IRQ if needed */
m68ki_check_interrupts();
/* Make sure we're not stopped */
if (CPU_STOPPED)
{
@ -229,11 +235,12 @@ void s68k_run(unsigned int cycles)
return;
}
/* Save end cycles count for when CPU is stopped */
s68k.cycle_end = cycles;
/* Return point for when we have an address error (TODO: use goto) */
m68ki_set_address_error_trap() /* auto-disable (see m68kcpu.h) */
/* Save end cycles count for when CPU is stopped */
s68k.cycle_end = cycles;
#ifdef LOG_SCD
error("[%d][%d] s68k run to %d cycles (%x), irq mask = %x (%x)\n", v_counter, s68k.cycles, cycles, s68k.pc,FLAG_INT_MASK, CPU_INT_LEVEL);
#endif
@ -249,10 +256,9 @@ void s68k_run(unsigned int cycles)
/* Decode next instruction */
REG_IR = m68ki_read_imm_16();
/* Execute instruction */
m68ki_instruction_jump_table[REG_IR](); /* TODO: use labels table with goto */
USE_CYCLES(CYC_INSTRUCTION[REG_IR]); /* TODO: move into instruction handlers */
m68ki_instruction_jump_table[REG_IR]();
USE_CYCLES(CYC_INSTRUCTION[REG_IR]);
/* Trace m68k_exception, if necessary */
m68ki_exception_if_trace(); /* auto-disable (see m68kcpu.h) */