Universal ITX Backplane - Assembled ISA & PC/104
An assembled backplane for modular retro-computer builds using compatible ISA or PC/104 processor and expansion boards. The reference design was developed for Micro8088 and Xi8088-style systems.
Supplied configuration
One soldered backplane with its fitted connectors. This listing is for the assembled version, rather than a bare PCB or loose-parts kit. A separate compatible processor board is required to build a working computer.
Reference design
- Four-layer PCB in a Mini-ITX-format layout.
- Three 8/16-bit ISA card positions, using paired connector sections.
- A PC/104 connection for compatible system designs.
- VGA-related connections and DB9 I/O connection points.
The original design includes MonochromeVGA circuitry. Available video and I/O functions depend on the installed cards, wiring and system configuration; the backplane is not a complete graphics adapter or computer.
Installation and compatibility
Check bus pinouts, power requirements, card orientation, mounting and case clearance against your chosen boards. Mini-ITX format does not guarantee that every ISA card arrangement will fit a commercial Mini-ITX enclosure. Switch off and disconnect power before fitting cards or changing wiring.
Power-control check
The supplied assembled configuration has been tested for normal power-button on/off operation. Historical prototype notes in the reference project describe an early power-control issue; they should not be read as a fault report for this supplied, function-tested configuration.