── REGISTERS ──
A:$00
X:$00
Y:$00
SP:$FD
PC:$0600
── STATUS FLAGS ──
N
V
-
B
D
I
Z
C
── CYCLES ──
Total:0
Last:0 cyc
── STACK ──
FF:$00
FE:$00
FD:$00 ◄ SP
FC:$00
FB:$00
FA:$00
F9:$00
F8:$00
F7:$00
F6:$00
F5:$00
F4:$00
F3:$00
F2:$00
F1:$00
F0:$00
── DISASSEMBLY ──
$05EC00 00BRK7c
$05EE00 00BRK7c
$05F000 00BRK7c
$05F200 00BRK7c
$05F400 00BRK7c
$05F600 00BRK7c
$05F800 00BRK7c
$05FA00 00BRK7c
$05FC00 00BRK7c
$05FE00 00BRK7c
$060000 00BRK7c
$060200 00BRK7c
$060400 00BRK7c
$060600 00BRK7c
$060800 00BRK7c
$060A00 00BRK7c
$060C00 00BRK7c
$060E00 00BRK7c
$061000 00BRK7c
$061200 00BRK7c
$061400 00BRK7c
$061600 00BRK7c
$061800 00BRK7c
$061A00 00BRK7c
$061C00 00BRK7c
$061E00 00BRK7c
$062000 00BRK7c
$062200 00BRK7c
$062400 00BRK7c
$062600 00BRK7c
$062800 00BRK7c
$062A00 00BRK7c
$062C00 00BRK7c
$062E00 00BRK7c
$063000 00BRK7c
$063200 00BRK7c
$063400 00BRK7c
$063600 00BRK7c
$063800 00BRK7c
$063A00 00BRK7c
── MEMORY ──
Addr:
$0600:00000000000000000000000000000000................
$0610:00000000000000000000000000000000................
$0620:00000000000000000000000000000000................
$0630:00000000000000000000000000000000................
$0640:00000000000000000000000000000000................
$0650:00000000000000000000000000000000................
$0660:00000000000000000000000000000000................
$0670:00000000000000000000000000000000................
$0680:00000000000000000000000000000000................
$0690:00000000000000000000000000000000................
$06A0:00000000000000000000000000000000................
$06B0:00000000000000000000000000000000................
$06C0:00000000000000000000000000000000................
$06D0:00000000000000000000000000000000................
$06E0:00000000000000000000000000000000................
$06F0:00000000000000000000000000000000................
── ROR BUG (REV A) ──
This emulator faithfully reproduces the original MOS 6502 ROR bug present in early revisions. The ROR instruction ignores the Carry flag input and behaves like ASL.
Waiting for ROR...
Bug Active (Rev A)
── DISPLAY (00-$05FF) ──
── EXAMPLES ──
▸ Hello ROR Bug
Demonstrates the ROR bug - watch carry flag behavior
▸ Fibonacci
Calculates Fibonacci sequence in zero page
▸ Multiply
8-bit multiply: $00 *
-> (lo),
(hi)▸ Memory Fill
Fills 00-$05FF with ascending values (pixel display)
▸ Snake (Simple)
Tiny snake game - writes patterns to display memory
── CONSOLE ──
>