mirror of
https://github.com/toyoshim/Applerm-II.git
synced 2024-10-31 11:08:32 +00:00
Bug fix: after TSX, X got a value >= 0x100
This commit is contained in:
parent
d0ad06c86a
commit
42cb53c0ad
5
6502.S
5
6502.S
@ -452,6 +452,8 @@
|
||||
.endm
|
||||
|
||||
.macro _cp reg
|
||||
prn r0
|
||||
prn \reg
|
||||
__cl (FLAG_N | FLAG_Z | FLAG_C)
|
||||
mov r1, \reg
|
||||
subs r0, r1, r0
|
||||
@ -1372,6 +1374,9 @@ opb9: // LDA - Absolute, Y
|
||||
|
||||
opba: // TSX
|
||||
_t SP, RX
|
||||
mov r0, RX
|
||||
uxtb r0, r0
|
||||
mov RX, r0
|
||||
_decode
|
||||
|
||||
opbc: // LDY - Absolute, X
|
||||
|
11
test.c
11
test.c
@ -1,3 +1,4 @@
|
||||
#include <assert.h>
|
||||
#include <stdio.h>
|
||||
#include <stdint.h>
|
||||
#include <stdlib.h>
|
||||
@ -15,10 +16,16 @@ void prn(int c) {
|
||||
__asm__("movs r12, %0":: "r"(fp));
|
||||
}
|
||||
|
||||
void cpu6502_dump(
|
||||
uint16_t pc, uint8_t a, uint8_t x, uint8_t y, uint8_t sp, uint8_t sr) {
|
||||
void cpu6502_dump(uint32_t pc, uint32_t a, uint32_t x, uint32_t y,
|
||||
uint32_t sp, uint32_t sr) {
|
||||
uint8_t fp;
|
||||
__asm__("movs %0, r12": "=r"(fp));
|
||||
assert(pc < 0x1000);
|
||||
assert(a < 0x100);
|
||||
assert(x < 0x100);
|
||||
assert(y < 0x100);
|
||||
assert(sr < 0x100);
|
||||
assert(0x100 <= sp && sp < 0x200);
|
||||
fprintf(stderr, "*** dump *** PC=$%04x A=$%02x X=$%02x Y=$%02x SP=$%02x "
|
||||
"NV-B_DIZC=%d%d-%d_%d%d%d%d\n",
|
||||
pc, a, x, y, sp, (sr >> 7) & 1, (sr >> 6) & 1, (sr >> 4) & 1,
|
||||
|
Loading…
Reference in New Issue
Block a user