toys/vm/source/tvm.c

#include "tvm.h"


/* Memory, 65536 locations */
uint16_t memory[UINT16_MAX];

/* Registers */
enum {
    R_R0 = 0,
    R_R1,
    R_R2,
    R_R3,
    R_R4,
    R_R5,
    R_R6,
    R_R7,
    R_PC, /* program counter */
    R_COND,
    R_COUNT
};

uint16_t reg[R_COUNT];

/* Flags */
enum {
    FL_POS = 1 << 0, /* P */
    FL_ZRO = 1 << 1, /* Z */
    FL_NEG = 1 << 2, /* N */
};