6502

6510

6502 systems

Atari

Apple II

Commodore 64

NES

6510

6510

  • 8-bit microprocessor
  • Modified version of 6502
  • NEW: 
    • addition of 8-bit general purpose I/O port
    • the address bus could be made tristate

Games

Music

SID (Sound Interface Device)

  • Demoscene

  • Live music

Demo

Music by: Rob Hubbard 

Screen RAM

40col x 25rows = 1000 bytes

1024-2023 ($0400-$07F7)

Color RAM

1000 bytes: maps the Screen RAM locations 1:1

55296-56295 ($D800-$DBE7)

  1. Clean the screen (Render black color)
  2. Place space char in the SCREEN RAM
  3. Place colors in the COLOR RAM
  • Change the char in the current position of the SCREEN RAM

IRQ

6502

By jvalen

6502

6502/10 introduction and c64 live demo

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