MC68705R3 simulator with source
Submitted By:
WEBMASTER
Rating:
Not rated (
Rate It)
typedef int (*PFI)(); /* Pointer to Function Returning Integer */
/* Pick one of the following two: */
#define MSC /* Uncomment for IBM-PC, Microsoft C 5.0 */
/* MSC screen control uses microsoft's graphics library and DOS BIOS 6 */
/* #define VT52 Uncomment for ATARI ST, Mark Williams C 3.0 */
/* ST screen control uses VT52 escape sequences. The ST emulates a VT52 */
#define DIRECT 0
#define ACCUM 1
#define X_REGISTER 2
#define AT_X_BYTE_OFFSET 3
#define AT_X 4
#define INH 5
#define IMM 6
#define EXT 7
#define AT_X_WORD_OFFSET 8
#define REL 9
#define BTB 10
/* Actually, table says INH for things that read/store X */
/* The following is used by instr routines to call get_ea, etc */
#define XREG 11
struct program_model {
int a;
int x;
int pc;
int sp;
int ccr;
};
#define CC_C 1
#define CC_Z 2
#define CC_N 4
#define CC_I 8
#define CC_H 16
#ifndef INSTR_C
extern struct program_model pgm_model;
extern char rw[], opcode[], mne[];
#endif
#ifndef SIMR3_C
extern int display_enabled, log_enabled, promptline_full;
extern int external_intr, timer_external_input;
extern int disassemble;
extern long int cycle_count;
#endif
#define PORT_A_DATA 0
#define PORT_B_DATA 1
#define PORT_C_DATA 2
#define PORT_D_DATA 3
#define PORT_A_DDR 4
#define PORT_B_DDR 5
#define PORT_C_DDR 6
#define TIMER_DATA 8
#define TIMER_CONTROL 9
#define MISC_REGISTER 10
#define EPROM_PGM_CTRL 11
#define AD_CTRL_REG 14
#define AD_REG 15
#define RAM_START 0x10
#define RAM_END 0x7F
#define PROM_START 0x80
#define PROM_END 0xF37
#define MASK_OPT_REG 0xF38
#define NOT_USED_START 0xF39
#define NOT_USED_END 0xF7F
#define BOOTSTRAP_ROM_START 0xF80
#define BOOTSTRAP_ROM_END 0xFF7
#define VECTORS_START 0xFF8
#define VECTORS_END 0xFFF
/* timer int, ext int, swi, reset */
/* display: lines 1-4 title and menu; line 5 separator; */
#define PROMPTLINE 6
/* lines 7 - 24 simulator trace */
/* Defines for registers understood by get_ea, sim_read, sim_write */
#define RW_A -1
#define RW_X -2
#define RW_SP -3
