collapseos/emul/emul.h
Virgil Dupras e1e0676191 emul/hw/sms: add A/B ports and a Genesis pad
This makes the emulator suitable to run the base SMS recipe.
2020-01-10 21:20:44 -05:00

34 lines
792 B
C

#pragma once
#include <stdint.h>
#include <stdbool.h>
#include "libz80/z80.h"
typedef byte (*IORD) ();
typedef void (*IOWR) (byte data);
typedef struct {
Z80Context cpu;
byte mem[0x10000];
// Set to non-zero to specify where ROM ends. Any memory write attempt
// below ramstart will trigger a warning.
ushort ramstart;
// The minimum value reached by SP at any point during execution.
ushort minsp;
// Array of 0x100 function pointers to IO read and write routines. Leave to
// NULL when IO port is unhandled.
IORD iord[0x100];
IOWR iowr[0x100];
} Machine;
typedef enum {
TRI_HIGH,
TRI_LOW,
TRI_HIGHZ
} Tristate;
Machine* emul_init();
bool emul_step();
bool emul_steps(unsigned int steps);
void emul_loop();
void emul_printdebug();