mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-05 02:15:07 +01:00
f2e93d4949
added John Madden Football 93 in EEPROM database (fixes backup support) initiated ROM database for cartridges that uses SRAM (some ROM headers are definitively wrong !), need more...
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
#ifndef Z80_H_
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#define Z80_H_
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#include "cpuintrf.h"
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enum {
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Z80_PC=1, Z80_SP, Z80_A, Z80_B,
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Z80_C, Z80_D, Z80_E, Z80_H, Z80_L,
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Z80_AF, Z80_BC, Z80_DE, Z80_HL,
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Z80_IX, Z80_IY, Z80_AF2, Z80_BC2, Z80_DE2, Z80_HL2,
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Z80_R, Z80_I, Z80_IM, Z80_IFF1, Z80_IFF2, Z80_HALT,
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Z80_DC0, Z80_DC1, Z80_DC2, Z80_DC3, Z80_MEMPTR
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};
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enum {
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Z80_TABLE_op,
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Z80_TABLE_cb,
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Z80_TABLE_ed,
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Z80_TABLE_xy,
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Z80_TABLE_xycb,
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Z80_TABLE_ex /* cycles counts for taken jr/jp/call and interrupt latency (rst opcodes) */
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};
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/****************************************************************************/
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/* The Z80 registers. HALT is set to 1 when the CPU is halted, the refresh */
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/* register is calculated as follows: refresh=(Z80.r&127)|(Z80.r2&128) */
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/****************************************************************************/
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typedef struct
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{
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PAIR prvpc,pc,sp,af,bc,de,hl,ix,iy,memptr;
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PAIR af2,bc2,de2,hl2;
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UINT8 r,r2,iff1,iff2,halt,im,i;
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UINT8 nmi_state; /* nmi line state */
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UINT8 nmi_pending; /* nmi pending */
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UINT8 irq_state; /* irq line state */
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UINT8 after_ei; /* are we in the EI shadow? */
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const struct z80_irq_daisy_chain *daisy;
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int (*irq_callback)(int irqline);
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} Z80_Regs;
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extern int z80_ICount;
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extern Z80_Regs Z80;
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void z80_init(int index, int clock, const void *config, int (*irqcallback)(int));
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void z80_reset (void);
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void z80_exit (void);
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int z80_execute(int cycles);
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void z80_burn(int cycles);
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void z80_get_context (void *dst);
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void z80_set_context (void *src);
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void z80_set_irq_line(int irqline, int state);
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unsigned int cpu_readport16(unsigned int port);
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void cpu_writeport16(unsigned int port, unsigned int data);
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unsigned int cpu_readmem16(unsigned int address);
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void cpu_writemem16(unsigned int address, unsigned int data);
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#endif
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