64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
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#ifndef CPU_H
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#define CPU_H
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#include "types.h"
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extern Byte acc; /* Accumulator */
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extern ADDRESS pc; /* Program counter */
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extern Byte itimer; /* Internal timer */
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extern Byte reg_pnt; /* pointer to register bank */
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extern Byte timer_on; /* 0=timer off/1=timer on */
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extern Byte count_on; /* 0=count off/1=count on */
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extern Byte t_flag; /* Timer flag */
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extern Byte psw; /* Processor status word */
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extern Byte sp; /* Stack pointer (part of psw) */
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extern Byte p1; /* I/O port 1 */
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extern Byte p2; /* I/O port 2 */
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extern Byte xirq_pend;
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extern Byte tirq_pend;
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void init_cpu(void);
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int64_t cpu_exec(int64_t ncycles);
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void ext_IRQ(void);
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void tim_IRQ(void);
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void make_psw_debug(void);
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Byte acc; /* Accumulator */
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ADDRESS pc; /* Program counter */
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Byte itimer; /* Internal timer */
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Byte reg_pnt; /* pointer to register bank */
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Byte timer_on; /* 0=timer off/1=timer on */
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Byte count_on; /* 0=count off/1=count on */
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Byte psw; /* Processor status word */
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Byte sp; /* Stack pointer (part of psw) */
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Byte p1; /* I/O port 1 */
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Byte p2; /* I/O port 2 */
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Byte xirq_pend; /* external IRQ pending */
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Byte tirq_pend; /* timer IRQ pending */
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Byte t_flag; /* Timer flag */
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ADDRESS lastpc;
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ADDRESS A11; /* PC bit 11 */
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ADDRESS A11ff;
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Byte bs; /* Register Bank (part of psw) */
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Byte f0; /* Flag Bit (part of psw) */
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Byte f1; /* Flag Bit 1 */
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Byte ac; /* Aux Carry (part of psw) */
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Byte cy; /* Carry flag (part of psw) */
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Byte xirq_en; /* external IRQ's enabled */
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Byte tirq_en; /* Timer IRQ enabled */
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Byte irq_ex; /* IRQ executing */
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int master_count;
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#endif /* CPU_H */
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