Tag: cache

2 matching upgrades

Showing 2 products.

StatusProductWhat it doesCompatibilityLinks
Find usedChecked Jul 14, 2026Orchid Tiny Turbo 286by Orchid Technology
cacheperiod upgradevintage

Period accelerator that upgrades a 4.77 MHz 8088 IBM PC or XT with an 8 MHz 80286 processor and 8K of cache.

This is a period product obtained used. The documentation project cannot produce a working clone until the original PAL devices are reverse engineered.

Sources
  • IBM Personal Computer 5150 Exact model
  • IBM Personal Computer XT 5160 Exact model
Hardware documentation projectSearch eBay
Find usedChecked Jul 27, 2026RamFAST/SCSIby Sequential Systems
scsidmacachegsosprodosperiod upgradeapple ii slot

Period high-speed SCSI controller with an onboard processor, DMA, cache, and ROM-based disk utilities.

This is a period controller obtained used. Confirm whether the board is Revision C or D and which ROM it runs. Revision D does not use DMA in a IIe, while Revision C needs its documented IIe switch setting. SCSI ID, termination, terminator power, cable length, drive power, and backups all require care. Compatibility problems are documented with some accelerator and memory-card combinations; ROM 3.01E and 3.01EZ have a tape-restore bug corrected in later firmware.

Sources
  • Apple IIe Exact model
  • Apple IIgs Exact model
RamFAST/SCSI unofficial manualRamFAST/SCSI history and firmware notesSearch eBay