Atari 8-bit cartridge hardware

Cartridge-port upgrades documented for an Atari 8-bit family or interface when their sources do not establish a safe exact-model list.

Also called: Atari cartridge port, Atari 8-bit cartridges, Atari XL/XE cartridge interface

At a glance

Products listed: 1

Exact-target evidence: 0

Family/interface evidence: 1

Product types: 1

Vintage searches: 0

Directory: Cartridge hardware

Browse everything below, or filter by product type, availability, and compatibility basis. Notes explain whether evidence names an exact target, a broader family, or only the relevant bus or interface for this platform.

Showing 1 product.

StatusProductWhat it doesLinks
DiscontinuedChecked Jul 27, 2026SIDE2 and SIDE3 Cartridge Familyby Sebastian "Candle" Bartkowicz / FlashJazzCat / Lotharek
cartridgecompactflashsd cardspartados xrtcloaderdmaatrflash romsramvintage

Adds cartridge-based CompactFlash or SD storage, SpartaDOS X, a real-time clock, and loader functions to Atari 8-bit systems.

For this platform (bus/interface): The seller describes SIDE as Atari 8-bit cartridge hardware but does not publish a safe exact-model matrix. Confirm cartridge fit, installed memory, O2 timing, 74LS08 or 74F08 behavior, Ultimate 1MB integration, and the exact SIDE hardware and firmware revision before use.

Lotharek marks both generations discontinued. SIDE2 needs at least 128 KB for its FDISK workflow, and full ATR loading requires Ultimate 1MB. Some systems need a faster 74F08 or buffered O2 timing path. Lotharek ended SIDE3 sales because it could not supply firmware that worked reliably across all computers; Revision 3.2 uses a Gowin FPGA, needs its matching firmware and programming path, and does not accept the older CPLD updates. Identify the exact hardware and firmware revision before buying or flashing a used cartridge.

Sources
Lotharek SIDE2 archive pageLotharek SIDE3 archive pageFlashJazzCat SIDE firmware archiveSearch eBay for Atari SIDE2 or SIDE3