Tag: 128kb

3 matching upgrades

Showing 3 products.

StatusProductWhat it doesCompatibilityLinks
Sold outChecked Jul 27, 2026Jupiter II Expansion Kitby A2Heaven
multifunctionrgb128kbpaged memoryforthserialkitsoldering

Adds RGB color, programmable sound, paged memory, a Forth extension ROM, and serial I/O to the Jupiter II computer.

A2Heaven marked the expansion kit out of stock on 2026-07-27. The historical package included the expansion PCB, active and passive components, pre-mounted SMD parts, placement and schematic diagrams, documentation, and source material. The base Jupiter II computer was separate and also out of stock.

Sources
  • Jupiter II compatible system Exact model
A2Heaven Jupiter II Expansion Kit page
Build itChecked Jul 24, 2026RAM128by Garrett's Workshop
128kbsaturn 128ksramopen hardwarediy

Adds 128 KB of low-power Saturn-compatible bank-switched RAM to slot-based Apple II systems.

The assembled Tindie card was out of stock on 2026-07-24 and had been sold out since March 14, 2025. The open repository provides schematics, KiCad files, Gerbers, and documentation. In an Apple IIe or IIgs this is not normal auxiliary or fast memory; only software that understands a Saturn-type card in a peripheral slot can use it.

Sources
  • Apple II Exact model
  • Apple II Plus Exact model
  • Apple IIe Exact model
  • Apple IIgs Exact model
RAM128 product pageRAM128 hardware files
AvailableChecked Jul 24, 2026RAMX128Kby JDMicro and ReActiveMicro
128kbactivity leds

Adds 128 KB of bank-switched RAM to an Apple II or II Plus through the slot 0 language-card connector.

The product was available on backorder with an Add to cart path on 2026-07-24. Software must support the selected Saturn-style bank-switching scheme to use the full capacity.

Sources
  • Apple II Exact model
  • Apple II Plus Exact model
RAMX128K product page