IBM Personal Computer 5150 upgrades

Open hardware reproductions of the two interface cards used to connect an IBM PC or XT to a 5161 Expansion Unit.

For this system (exact model): The project explicitly supports an IBM PC host connected to a 5161 Expansion Unit. It requires the extender and receiver cards plus a suitable chassis, backplane, and cable; the README recommends a cable around one meter long.

Current 8-bit ISA adapter that lets a CompactFlash card serve as an XT-IDE hard disk in an IBM PC or XT-class computer.

For this system (bus/interface): The adapter uses an 8-bit ISA slot, but the earliest 5150 BIOS revisions do not support option ROMs. Those machines need a later BIOS before the onboard XT-IDE Universal BIOS can operate.

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

For this system (exact model): The card was designed to accelerate the 4.77 MHz 8088 IBM PC. It connects through the computer's 8088 CPU socket; verify that a used example includes the required socket adapter and cable.

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

Current multifunction 8-bit ISA card that adds emulated storage, memory, networking, and USB or SD-connected devices to PC/XT-class computers.

For this system (bus/interface): PicoMEM uses the 8-bit ISA bus provided by the IBM 5150. Its emulated RAM can be slower than native memory, so the project recommends a conventional RAM card when full zero-wait-state expansion is the priority.