Atari 7800 , is a home video game console officially released by the Atari Corporation in 1986. It has backward-compatible with the Atari 2600, the first console to have backward compatibility without any add modules.

Technical specifications

• CPU: Atari SALLY 6502 (“6502C”)
  • 1.79 MHz
• RAM: 4 KB (2 6116 2Kx8 RAM ICs)
• ROM: built in 4 KB BIOS ROM, 48 KB Cartridge ROM
• Graphics: MARIA custom chip
  • Resolution: 160×240 or 320×240
  • Color palette: 256
  • Direct Memory Access (DMA)
  • Graphics clock: 7.15 MHz
  • Line buffer: 200 bytes (double buffering), 160 sprite pixels per scanline, 
  • Sprite/zone sizes: 4 to 160 width, height of 4, 8 or 16 pixels
  • Colors per sprite: 1 to 12
• I/O: Joystick and console switch IO handled by 6532 RIOT and TIA
• Ports
  • 2 joystick ports
  • cartridge port
  • expansion connector
  • power in
  • RF output
• Sound: TIA in 2600 for video and sound. In 7800 mode it is only used for sound.
  • Games may have POKEY sound chip for improved audio.

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Originally posted on October 22, 2020 @ 5:16 pm