1090XL-family expansion systems

Provides 64 KB of main RAM and 256 KB of RAMBO-compatible extended memory through a 1090XL-family expansion slot.

For this platform (exact target): The card plugs into a 1090XL or 1091XL expansion slot. Configure its two solder jumpers for the exact base-system revision and for any other memory-mapped cards.

The page reported three cards in stock on 2026-07-27. A 1090XL or 1091XL base system is required and is not included. The PBI-memory option must remain off when the host has VBXE or Ultimate 1MB. The RAM-disable option is recommended for modern reproduction systems so other cards can map their own memory.

Provides 80-column text over HDMI from a Raspberry Pi Pico card installed in a 1090XL-family expansion system.

For this platform (exact target): Install in a 1090XL or 1091XL slot, assign a unique device ID, and connect a separate HDMI display. The base expansion system is not included.

The page reported three cards in stock on 2026-07-27. A 1090XL or 1091XL base system and a separate HDMI display are required. Enabling the card disables normal video output; holding Shift while booting disables the card. Each installed expansion card needs its own jumper-selected device ID.

Connects an Atari CX-85 numeric keypad through a 1090XL-family expansion slot with an onboard input handler.

For this platform (exact target): Install in a 1090XL or 1091XL slot and use the jumper to assign a device ID that does not conflict with other expansion cards.

The page reported two cards in stock on 2026-07-27. A 1090XL or 1091XL base system and an Atari CX-85 keypad are required. Current compatibility is limited to software that obtains input through the Atari operating system.

Adds five 1090XL-family expansion slots to an Atari 600XL or 800XL through the rear parallel bus.

For this platform (exact target): This is the current five-slot base system for the shared 1090XL-family expansion-card page. Cards, a 9 VAC supply, and any optional 12 V configuration are separate.

The page reported one system in stock on 2026-07-27. The 50-pin parallel cable is included, but a compatible 9 VAC Atari power supply is not. Expansion cards and the optional 12 V supply configuration cost extra; the seller says no currently available card needs that optional 12 V rail. Systems are assembled on demand and may take several days to ship.

Adds Hias high-speed SIO and Fast Math F+ through a 1090XL-family expansion card.

For this platform (exact target): Install in a 1090XL or 1091XL expansion slot. Hold Select during boot to disable its operating-system extensions.

The page reported two cards in stock on 2026-07-27. The sale includes only this card; the 1090XL-family base system and the separately pictured CP/M card are not included.

Adds an 8 MHz-or-faster Z80, 64 KB of onboard memory, and a beta CP/M environment through a 1090XL expansion slot.

For this platform (exact target): Install in a 1090XL slot with an 8 MHz-or-faster Z80. Treat the CP/M environment as beta and acquire the optional 80-column card separately if desired; the seller does not explicitly name the 1091XL on this card's page.

The page reported one card in stock on 2026-07-27. CP/M customization and utilities remain late beta. The card is sold with or without a Z80; a user-supplied CPU must be rated for at least 8 MHz. The pictured 80-column RPP card is optional and not included. Double-density disk use also requires supporting drive hardware. The exact page names only the 1090XL, so confirm 1091XL compatibility before using it in that implementation.