mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-01 11:52:47 +00:00
72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
#ifndef S12Z_H
|
|
#define S12Z_H
|
|
|
|
/* This byte is used to prefix instructions in "page 2" of the opcode
|
|
space */
|
|
#define PAGE2_PREBYTE (0x1b)
|
|
|
|
struct reg
|
|
{
|
|
char *name; /* The canonical name of the register */
|
|
int bytes; /* its size, in bytes */
|
|
};
|
|
|
|
|
|
/* How many registers do we have. Actually there are only 13,
|
|
because CCL and CCH are the low and high bytes of CCW. But
|
|
for assemnbly / disassembly purposes they are considered
|
|
distinct registers. */
|
|
#define S12Z_N_REGISTERS 15
|
|
|
|
extern const struct reg registers[S12Z_N_REGISTERS];
|
|
|
|
enum {
|
|
REG_D2 = 0,
|
|
REG_D3,
|
|
REG_D4,
|
|
REG_D5,
|
|
REG_D0,
|
|
REG_D1,
|
|
REG_D6,
|
|
REG_D7,
|
|
REG_X,
|
|
REG_Y,
|
|
REG_S,
|
|
REG_P,
|
|
REG_CCH,
|
|
REG_CCL,
|
|
REG_CCW
|
|
};
|
|
|
|
/* Any of the registers d0, d1, ... d7 */
|
|
#define REG_BIT_Dn \
|
|
((0x1U << REG_D2) | \
|
|
(0x1U << REG_D3) | \
|
|
(0x1U << REG_D4) | \
|
|
(0x1U << REG_D5) | \
|
|
(0x1U << REG_D6) | \
|
|
(0x1U << REG_D7) | \
|
|
(0x1U << REG_D0) | \
|
|
(0x1U << REG_D1))
|
|
|
|
/* Any of the registers x, y or z */
|
|
#define REG_BIT_XYS \
|
|
((0x1U << REG_X) | \
|
|
(0x1U << REG_Y) | \
|
|
(0x1U << REG_S))
|
|
|
|
/* Any of the registers x, y, z or p */
|
|
#define REG_BIT_XYSP \
|
|
((0x1U << REG_X) | \
|
|
(0x1U << REG_Y) | \
|
|
(0x1U << REG_S) | \
|
|
(0x1U << REG_P))
|
|
|
|
/* The x register or the y register */
|
|
#define REG_BIT_XY \
|
|
((0x1U << REG_X) | \
|
|
(0x1U << REG_Y))
|
|
|
|
|
|
#endif
|