Tag: option rom

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.

Open ISA controller with two floppy controllers for up to eight drives, plus optional serial and BIOS hardware.

The assembled and tested card was out of stock on Tindie on 2026-07-25 and had been sold out since January 31, 2026. Open KiCad files, Gerbers, a bill of materials, and a manual remain available. Optional 5 V-on-pin-3 jumpers are only for compatible PS/2-style floppy drives and can damage standard drives if installed incorrectly.

Open ISA card combining a two-drive floppy controller, RS-232 serial port, and optional BIOS ROM.

The repository supplies KiCad files, Gerbers, a bill of materials, and assembly documentation rather than a retail order path. Install the 5 V-on-pin-3 jumper only for a compatible PS/2-style drive; using it with a standard drive causes a short. Version 1.0 also has a documented option-ROM switch-table error.

Adds SATA storage to a PC-compatible PCI system with a bootable option ROM.

Both Rabbit Hole Computing variants were sold out on 2026-07-24. The custom Hard Card included an M.2 SATA SSD and PCI bracket; the generic card did not include SATA cables. These pages document PC firmware and drivers, not Macintosh compatibility.

DIY 8-bit ISA CompactFlash adapter that provides mass storage and supports an XT-IDE BIOS extension ROM.

The project supplies build files and documentation rather than a direct retail order path.