Commodore 64 Hardware Emulator

6510PLA6526×2VIC-IISID

Every chip. Every register. In your browser.

100Hz

ASSEMBLER

Org: $

; VIC-II Raster Color Bars
; Changes border color per raster
  .org $0600
  SEI
loop:
  LDA $D012    ; read raster line
  AND #$0F     ; mask to 0-15
  STA $D020    ; set border color
  STA $D021    ; set bg color
  JMP loop     ; infinite loop

A

$00

0

X

$00

0

Y

$00

0

SP

$FD

253

PC

$0600

FLAGS

N0

V0

-1

B0

D0

I1

Z0

C0

NEXT INSTRUCTION

$0600: BRK

6510 I/O PORT

$0000 DDR00101111

$0001 I/O00110111

LORAM=1 HIRAM=1 CHAREN=1

Cycles: 0Instr: 0Raster: 0

MEMORY

$06000000000000000000 0000000000000000................

$06100000000000000000 0000000000000000................

$06200000000000000000 0000000000000000................

$06300000000000000000 0000000000000000................

$06400000000000000000 0000000000000000................

$06500000000000000000 0000000000000000................

$06600000000000000000 0000000000000000................

$06700000000000000000 0000000000000000................

$06800000000000000000 0000000000000000................

$06900000000000000000 0000000000000000................

$06A00000000000000000 0000000000000000................

$06B00000000000000000 0000000000000000................

$06C00000000000000000 0000000000000000................

$06D00000000000000000 0000000000000000................

$06E00000000000000000 0000000000000000................

$06F00000000000000000 0000000000000000................

ASSEMBLER

Org: $

; VIC-II Raster Color Bars
; Changes border color per raster
  .org $0600
  SEI
loop:
  LDA $D012    ; read raster line
  AND #$0F     ; mask to 0-15
  STA $D020    ; set border color
  STA $D021    ; set bg color
  JMP loop     ; infinite loop

VIDEO OUTPUTBorder: Lt Blue BG: Blue Line: 0

CONSOLE

Write assembly, Assemble, then Run or Step.

I/O ($F001)

STA $F001 to output

No silicon was harmed. Space=Step Enter=Run R=ResetRemix on Berrry 🍓