Tag: low profile

Open low-profile card that adds 3 MB to a Macintosh Classic using two modern DRAM chips.

The assembled Tindie card remained out of stock on 2026-07-27 and had been sold out since August 13, 2025. The schematics and board layouts remain available for commercial and noncommercial use.

Adds low-profile, adjustable RAMWorks-compatible auxiliary memory to an Apple IIe.

The assembled Tindie card was out of stock on 2026-07-24 and had been sold out since December 1, 2025. The open repository remains buildable. A Revision A IIe needs the card's DHGR jumper resistor or trace removed and then loses double-high-resolution graphics support. An A2Heaven VGA Scaler's long 14 MHz clock lead can cause RAM errors unless its clock connection is buffered or otherwise corrected as documented.

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.