6502/rk65c02
1
0
Fork 0
mirror of https://github.com/rkujawa/rk65c02.git synced 2024-06-08 21:29:31 +00:00
Code Issues Projects Releases Wiki Activity

Move reg_state struct to header, rename op to opcode.

Browse Source
This commit is contained in:
Radosław Kujawa 2017-01-17 11:18:48 +01:00
parent 0da3d6dc5f
commit d515954f44
2 changed files with 14 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/rk65c02.c
View File

@ -11,18 +11,6 @@
static bool run = false;
struct reg_state {
uint8_t A; /* accumulator */
uint8_t X; /* index X */
uint8_t Y; /* index Y */
uint16_t PC; /* program counter */
uint8_t SP; /* stack pointer */
uint8_t P; /* status */
};
typedef struct reg_state reg_state_t;
instruction_t
instruction_fetch(bus_t *b, uint16_t addr)
{
@ -31,7 +19,7 @@ instruction_fetch(bus_t *b, uint16_t addr)
i.opcode = bus_read_1(b, addr);
i.def = instrs[i.opcode];
assert(i.def.op != OP_UNIMPL);
assert(i.def.opcode != OP_UNIMPL);
/* handle operands */
switch (i.def.mode) {

15
src/rk65c02.h
View File

@ -18,8 +18,20 @@ typedef enum {
IABSOLUTEX
} addressing_t;
struct reg_state {
uint8_t A; /* accumulator */
uint8_t X; /* index X */
uint8_t Y; /* index Y */
uint16_t PC; /* program counter */
uint8_t SP; /* stack pointer */
uint8_t P; /* status */
};
typedef struct reg_state reg_state_t;
struct instrdef {
uint8_t op;
uint8_t opcode;
const char *mnemonic;
addressing_t mode;
uint8_t size;
@ -36,7 +48,6 @@ struct instruction {
typedef struct instruction instruction_t;
#define OP_BRK 0x00
#define OP_TSB_ZP 0x04
#define OP_JSR 0x20