Tag: 70ns

Open four-layer 30-pin FPM memory family with 4 MB, parity, 16 MB, and early-Macintosh PAL SIMM variants.

The assembled GW4192A kit was out of stock on 2026-07-24 and had been sold out since October 26, 2022. GW4194A had been sold out since January 19, 2023. Open schematics and layouts remain available. These modules support FPM, not EDO, even when an EDO chip is wired to operate in FPM mode. Check refresh type, parity, capacity, bank population, and physical clearance against the exact computer before building or installing a variant.

Open 512 KB 68-pin Macintosh VRAM SIMM built with new 80 ns or faster memory.

The assembled Tindie module was out of stock on 2026-07-24 and had been sold out since May 5, 2024. Schematics and board files remain available for commercial and noncommercial use. A 512 KB module can replace a 256 KB module where the connector is compatible, but that machine will use only 256 KB; never mix capacities within one VRAM bank.

Newly made, assembled 512 KB 68-pin Macintosh VRAM SIMMs in standard and low-latency 70 ns or 70/60 ns variants.

On 2026-07-27, the blue 70 ns module was $29 with one left, while the fast 70/60 ns page was listed at $29 with a latency selector and no out-of-stock marker. The original $25 PurpleRAM version had been sold out since December 16, 2024. The seller said economy shipping from France to the United States was suspended and exposed only an expedited $50 route on the blue listing.