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Convert DrZ80_support.cpp to C

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This commit is contained in:
twinaphex 2020-10-04 11:46:35 +02:00
parent e16a90d669
commit 00cf872821
3 changed files with 35 additions and 36 deletions
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62
DrZ80_support.cpp → DrZ80_support.c
View File

@ -20,28 +20,28 @@
#define INT_IRQ 0x01
#define NMI_IRQ 0x08
Z80_Regs Z80;
struct Z80_Regs Z80;
#define z80_int() Z80.regs.Z80_IRQ = INT_IRQ
#define z80_nmi() Z80.regs.Z80IF |= NMI_IRQ
#define Z80_INT() Z80.regs.Z80_IRQ = INT_IRQ
#define Z80_NMI() Z80.regs.Z80IF |= NMI_IRQ
static unsigned int z80_rebaseSP(unsigned short address)
{
Z80.regs.Z80SP_BASE = (unsigned int)&mainram[0x3000];
Z80.regs.Z80SP = Z80.regs.Z80SP_BASE + address;
return Z80.regs.Z80SP_BASE + address;
Z80.regs.Z80SP_BASE = (unsigned int)&mainram[0x3000];
Z80.regs.Z80SP = Z80.regs.Z80SP_BASE + address;
return Z80.regs.Z80SP_BASE + address;
}
static unsigned int z80_rebasePC(unsigned short address)
{
Z80.regs.Z80PC_BASE = (unsigned int)&mainram[0x3000];
Z80.regs.Z80PC = Z80.regs.Z80PC_BASE + address;
return Z80.regs.Z80PC_BASE + address;
Z80.regs.Z80PC_BASE = (unsigned int)&mainram[0x3000];
Z80.regs.Z80PC = Z80.regs.Z80PC_BASE + address;
return Z80.regs.Z80PC_BASE + address;
}
static void z80_irq_callback(void)
{
Z80.regs.Z80_IRQ = 0x00;
Z80.regs.Z80_IRQ = 0x00;
}
@ -50,36 +50,36 @@ static void z80_irq_callback(void)
****************************************************************************/
void Z80_Reset(void)
{
memset (&Z80, 0, sizeof(Z80_Regs));
Z80.regs.z80_rebasePC=z80_rebasePC;
Z80.regs.z80_rebaseSP=z80_rebaseSP /* 0 */;
Z80.regs.z80_read8 =z80MemReadB; /* z80_read8 */
Z80.regs.z80_read16 =z80MemReadW;
Z80.regs.z80_write8 =DrZ80ngpMemWriteB;
Z80.regs.z80_write16 =DrZ80ngpMemWriteW;
Z80.regs.z80_in =DrZ80ngpPortReadB;
Z80.regs.z80_out =DrZ80ngpPortWriteB;
Z80.regs.z80_irq_callback=z80_irq_callback;
Z80.regs.Z80BC = 0013;
Z80.regs.Z80DE = 0x00D8;
Z80.regs.Z80HL = 0x014D;
Z80.regs.Z80PC=Z80.regs.z80_rebasePC(0);
Z80.regs.Z80SP=Z80.regs.z80_rebaseSP(0xFFFE);
memset (&Z80, 0, sizeof(struct Z80_Regs));
Z80.regs.z80_rebasePC=z80_rebasePC;
Z80.regs.z80_rebaseSP=z80_rebaseSP /* 0 */;
Z80.regs.z80_read8 =z80MemReadB; /* z80_read8 */
Z80.regs.z80_read16 =z80MemReadW;
Z80.regs.z80_write8 =DrZ80ngpMemWriteB;
Z80.regs.z80_write16 =DrZ80ngpMemWriteW;
Z80.regs.z80_in =DrZ80ngpPortReadB;
Z80.regs.z80_out =DrZ80ngpPortWriteB;
Z80_Clear_Pending_Interrupts();
Z80.regs.z80_irq_callback=z80_irq_callback;
Z80.regs.Z80BC = 0013;
Z80.regs.Z80DE = 0x00D8;
Z80.regs.Z80HL = 0x014D;
Z80.regs.Z80PC=Z80.regs.z80_rebasePC(0);
Z80.regs.Z80SP=Z80.regs.z80_rebaseSP(0xFFFE);
Z80_Clear_Pending_Interrupts();
}
void Z80_Cause_Interrupt(int type)
{
if (type == Z80_NMI_INT)
{
z80_nmi();
Z80_NMI();
}
else if (type != Z80_IGNORE_INT)
{
z80_int();
Z80_INT();
}
}
@ -91,7 +91,7 @@ void Z80_Clear_Pending_Interrupts(void)
/****************************************************************************
* Execute IPeriod T-states. Return number of T-states really executed
****************************************************************************/
extern "C" int Z80_Execute(int cycles)
int Z80_Execute(int cycles)
{
Z80.regs.cycles = cycles;

7
DrZ80_support.h
View File

@ -5,7 +5,6 @@
extern "C" {
#endif
#include "DrZ80.h"
/****************************************************************************/
@ -16,7 +15,7 @@ typedef struct {
struct DrZ80 regs;
} Z80_Regs;
extern Z80_Regs Z80;
extern struct Z80_Regs Z80;
#define Z80_IGNORE_INT -1 /* Ignore interrupt */
#define Z80_NMI_INT -2 /* Execute NMI */
@ -24,8 +23,8 @@ extern Z80_Regs Z80;
extern unsigned Z80_GetPC (void); /* Get program counter */
extern int Z80_GetPreviousPC (void);
extern void Z80_GetRegs (Z80_Regs *Regs); /* Get registers */
extern void Z80_SetRegs (Z80_Regs *Regs); /* Set registers */
extern void Z80_GetRegs (struct Z80_Regs *Regs); /* Get registers */
extern void Z80_SetRegs (struct Z80_Regs *Regs); /* Set registers */
extern void Z80_Reset(void);
extern int Z80_Execute(int cycles); /* Execute cycles T-States - returns number of cycles actually run */

2
Makefile.common
View File

@ -52,7 +52,7 @@ SOURCES_C += \
ifeq ($(DRZ80),1)
FLAGS += -DDRZ80
SOURCES_CXX += $(CORE_DIR)/DrZ80_support.cpp
SOURCES_C += $(CORE_DIR)/DrZ80_support.c
SOURCES_ASM := $(CORE_DIR)/DrZ80.s
else
FLAGS += -DCZ80