Tag: dram

Tested 64K-by-1 4164 DRAM chips for repairing Commodore 64 motherboards that use the eight-chip, 16-pin memory layout.

Both exact product routes were present on 2026-07-30, but Tavily did not expose an unambiguous current cart or stock control on the ToTs RETRO page, and Retroleum was temporarily closed until approximately the beginning of August 2026. Confirm stock before ordering. Match the installed memory organization and motherboard rather than relying on case style: Retroleum explicitly excludes Assy 250466 and C64C boards that use two 41464 or 4464 devices.

Expands a 16 KB Atari 600XL to 64 KB with two 41464 DRAMs and three wiring changes.

The archived instructions call for two 41464-10 or compatible DRAMs, hookup wire, soldering tools, and optional sockets. Chips may need desoldering, several pins and resistor leads must be isolated, and fine motherboard traces are exposed; the author explicitly says to attempt it only if the diagram is understood and at the builder's risk. This is a historical modification guide, not a current kit.

USB-C-powered bench tester for several families of one-bit vintage dynamic RAM.

Tindie listed seven units at USD 28 on 2026-07-30. Its extracted United States shipping panel was contradictory, showing no rate alongside other shipping text, so confirm destination eligibility and total cost before ordering. The tester requires 5 VDC through USB-C. The manual warns that selecting the wrong RAM can apply destructive voltages; identify the part and verify its datasheet and pinout before starting a test.

Provides 1 MB or 4 MB of geoRAM-compatible cartridge memory for the Commodore 64 and 128.

GGLABS marks both technical projects released, but the current GRAM/4D Tindie listing says the seller is taking a break and no current GRAM/1D order path was verified. The published pages are useful technical documentation but do not expose a complete fabrication package. GeoRAM-aware software is required. GEOS 2.0r can use at most 2 MB; the full 4 MB needs patched GEOS 2.0r+, GEOS MP3, Wheels, or another compatible program.

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.

Open ATmega328P bench tester that automatically identifies and checks a broad range of vintage DRAM and 2114 SRAM.

The repository was active on 2026-07-20 and documents firmware 5.0.7. It links ready-made routes at AmiBay, Lectronz, eBay, and Tindie plus a PCBWay through-hole board, but those sellers were not independently checked for stock in this pass. Hardware is CERN-OHL-S v2 and firmware is GPLv3. Builders may use through-hole or surface-mount files and must select or build any required adapter for the exact package.

Expands an Atari Falcon030 to 14 MB with a dedicated board populated by 50 ns DRAM.

Lotharek marks the Vulture board discontinued. Its page establishes the Falcon030 and 14 MB purpose but provides no written installation, board-revision, clearance, diagnostic, or original-memory requirements. Compare a used board against the archived photographs and obtain experienced Falcon installation guidance before fitting it.