Tag: 512k

2 matching upgrades

Showing 2 products.

StatusProductWhat it doesCompatibilityLinks
Sold outChecked Jul 24, 2026GZ/80S 20MHz CP/M Cardby GGLABS
z80cpmapple ii slotcoprocessor20mhz512kreplica

Runs PCPI Applicard-compatible CP/M software on a dedicated 20 MHz Z80 with 512K of onboard RAM.

The GGLABS Tindie store was taking a break on 2026-07-24, so no current order could be placed. This card is PCPI Applicard-compatible, not Microsoft SoftCard-compatible; choose CP/M software and disk images for the Applicard environment.

Sources
  • Apple IIe Exact model
  • Apple IIgs Exact model
Vendor product pageOfficial project documentation
AvailableChecked Jul 24, 2026SMC Fat Mac Switcherby Infinity Products
memory128k512kkitsoldering

Switches an upgraded early Macintosh between 128K and 512K memory configurations.

The product page listed the switcher kit and optional Macintosh 512K adapter without an out-of-stock marker on 2026-07-24. The vendor no longer sends this electronic item by international registered mail.

Sources
  • Macintosh 128K Exact model
  • Macintosh 512K Exact model
SMC Fat Mac Switcher product and installation page