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