mirror of https://github.com/hsoft/collapseos.git
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include "z80.h"
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#define MAX_PCHOOK_COUNT 8
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#define LEN8BIT 0x100
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#define LEN16BIT 0x10000
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typedef byte (*IORD) ();
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typedef void (*IOWR) (byte data);
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typedef byte (*EXCH) (byte data);
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typedef struct _Machine {
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Z80Context cpu;
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byte mem[LEN16BIT];
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// Set to non-zero to specify where ROM ends. Any memory write attempt
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// below ramstart will trigger a warning.
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ushort ramstart;
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// The minimum value reached by SP at any point during execution.
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ushort minsp;
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// same principle for IX
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ushort maxix;
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// Array of 0x100 function pointers to IO read and write routines. Leave to
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// NULL when IO port is unhandled.
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IORD iord[LEN8BIT];
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IOWR iowr[LEN8BIT];
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// function to call when PC falls in one of the hooks
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void (*pchookfunc) (struct _Machine *m);
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// List of PC values at which we want to call pchookfunc
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ushort pchooks[MAX_PCHOOK_COUNT];
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byte pchooks_cnt;
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} Machine;
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typedef enum {
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TRI_HIGH,
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TRI_LOW,
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TRI_HIGHZ
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} Tristate;
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Machine* emul_init(char *binpath, ushort binoffset);
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bool emul_step();
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bool emul_steps(unsigned int steps);
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void emul_loop();
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void emul_trace(ushort addr);
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void emul_memdump();
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void emul_debugstr(char *s);
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void emul_printdebug();
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uint8_t emul_mem_read(int unused, uint16_t addr);
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void emul_mem_write(int unused, uint16_t addr, uint8_t val);
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// use when a port is a NOOP, but it's not an error to access it.
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byte iord_noop();
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void iowr_noop(byte val);
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