Tag: atari 1200xl

2 matching upgrades

Showing 2 products.

StatusProductWhat it doesCompatibilityLinks
AvailableChecked Jul 27, 20265cfab 1200XL Cartridge Extenderby 5cfab
atari 1200xlpass throughbasichigh speed siofast math

Moves the Atari 1200XL cartridge slot outside its recessed tunnel and adds switchable OS 6.42 and BASIC firmware.

The page reported three cards in stock on 2026-07-27. OS 6.42 adds bug fixes, high-speed SIO, faster floating point, CX-85 handling, WozMon, and cassette improvements. Its activity LEDs do not work when the computer has more than 64 KB, and some software is incompatible because the replacement OS runs from RAM; the front switch disables that OS when needed. Only the card is included.

Sources
  • Atari 1200XL Exact model
5cfab 1200XL extender product page
AvailableChecked Jul 27, 20265cfab 1200XL MMU Replacementby 5cfab
atari 1200xlmmureplacement partrepair

Replaces the Atari 1200XL's model-specific C060609 memory-management chip with a programmed modern logic device.

The page reported two units in stock on 2026-07-27. This listing is specifically a replacement for Atari part C060609 in socket U14 of a 1200XL. Do not treat the seller's general explanation of MMUs across the Atari 8-bit family as compatibility with other models.

Sources
  • Atari 1200XL Exact model
5cfab 1200XL MMU product page