Tag: 4mb

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.

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 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.

Replaces an Atari ST or Mega ST memory subsystem with a 4 MB expansion and a motherboard-specific adapter.

The Heron board and three current adapters exposed order paths on 2026-07-27. A complete installation requires the Heron plus either the C070789-001 Revision F adapter, the C070523-001 Revision D adapter, or the universal socketed-MMU adapter. C070859-001 Revision 2.0 and C103414-001 adapters were still described as in development. The Shifter must be socketed or desoldered, the original RAM must be disabled, and A9 and WE wires must be connected. This is a skilled mains-exposed internal installation; disconnect power and choose the exact motherboard adapter before ordering.

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.

Adds either 4 MB or 8 MB of low-power fast RAM to an Apple IIgs.

The GGLABS Tindie store was taking a break on 2026-07-24, so neither capacity had a current order path. Choose one capacity; both occupy the dedicated memory slot.

Adds 4 MB of auxiliary-slot RAM to an Apple IIe in assembled or through-hole kit form.

The current page offered assembled and kit selectors with an Add to cart path on 2026-07-24. This is a complete 4 MB card, distinct from A2Heaven's 64K RamWorks III clone kit.

DIY 4 MB 30-pin Macintosh memory module made by transplanting DRAM from a compatible 16 MB 72-pin SIMM.

The current store listed the bare kit and optional passive-component set without an out-of-stock marker on 2026-07-24. Compatible donor DRAM is not included.