Tag: dma

Adds 4 MB of DMA-compatible memory to a ROM 01 or ROM 03 Apple IIgs.

Human review confirmed that the product page was in stock on 2026-07-24. The page describes kit and assembled variants, but the answer did not distinguish the stock state of each selector option.

Adds selectable 4 MB or 8 MB of low-profile SDRAM fast memory to an Apple IIgs.

The assembled Tindie card was out of stock on 2026-07-24 and had been sold out since June 17, 2025. The repository retains hardware, programmable-logic, documentation, and fabrication sources. Select 4 MB when every byte must be DMA-accessible; at 8 MB, only the first 4 MB is DMA-compatible.

Period high-speed SCSI controller with an onboard processor, DMA, cache, and ROM-based disk utilities.

This is a period controller obtained used. Confirm whether the board is Revision C or D and which ROM it runs. Revision D does not use DMA in a IIe, while Revision C needs its documented IIe switch setting. SCSI ID, termination, terminator power, cable length, drive power, and backups all require care. Compatibility problems are documented with some accelerator and memory-card combinations; ROM 3.01E and 3.01EZ have a tape-restore bug corrected in later firmware.

Adds a switch-selectable 256 KB to 16 MB DMA RAM Expansion Unit compatible with Commodore 1700, 1750, and 1764 software.

RETRO Innovations exposed an Add to Cart path at $75 on 2026-07-27. A dated 2026-04-29 notice on the product page says red enclosures were temporarily unavailable and orders could take two to three weeks to ship, so confirm the current enclosure and fulfillment state when ordering.

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

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.

Adds a DE10-Nano Linux coprocessor, 1080p HDMI video, DMA, storage, networking, and a framebuffer overlay to a Commodore 64.

The project remains under construction and its current releases are alpha previews. Carrier Gerbers, a BOM, placement data, and preview releases are available, but a DE10-Nano or compatible MisterPi board and the supplied SD image are also required. Change the default Debian root password before connecting it to a network.