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IBM PC XT 8-bit ISA Prototype PCB Card mini


I have originally designed this prototypng PCB card for few of my projects, but this turn out so well, that I have offered PCB's for minimum price for my fellow enthusiast such as yourself :)
You can use these card in industry standard ISA XT 8-bit or AT 16-bit slot which is backward compatibel. Use card in conjuction with IBM PC XT 8-bit ISA Bus Raiser Extender Card
to raise above motherboard for easier access and protyping. Card has standard 62pin 2x31pin connectors with 45° chamfered edge for easy insertion.

These boards look absolutely gorgeous in standard green solder mask if you going for that standard industrial look.
I can advise you where to buy PCB rear mounting bracket, alternatively you can 3D print your own, files are all over interwebs.

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click on pictures to enlarge
IBM PC XT8-bit ISA Prototype PCB Card mini
IBM PC XT8-bit ISA Prototype PCB Card mini

Purchase item

... but if you feel like getting something for nothing isn't your cup of tea (completely understandable) (ಥ﹏ಥ) and a prefer to support me and get something back in return, then you please purchase this item directly from my on my eBay shop (click on FleaBay logo above). However if you are still up for an adventure (and are happy to have PCB's made yourself in your favourite PCB house - JLCPCB is recommended), then carry on and download gerber files further down. ( ͡° ͜ʖ ͡°)


Board Type: Prototype Board
Board Material: FR4-Standard Tg 130-140C Epoxy Glass Composite
Layers: Double sided
PCB Colour: Green colour solder mask, white silk screen lettering
Surface Finish: Lead free HASL-RoHS
External size: 100x100mm
Board Thickness: standard 1.6mm fits in standard 8-bit ISA card slot
Pitch: 2.54mm (100.00 mils)
Hole matrix: 39x23pin + 62pin prototyping (959pin in total)
Hole size: 1.00mm
Board Connector / Footprint: 62pin 2x31pin ISA Bus PCB edge connector with 45° chamfered edge,
Copper Thickness: 35um
Card weight: 30g

Bill of materials

Identifier Value Qty Notes
Printed Circuit Board 8bit ISA prototype PCB 102 x 98 mm 2 Layer FR4 1 v1.2

Assembly instructions and notes

for 45° chamfered edge use option Gold Fingers and 45°finger chamfered option when sending PCB to matufacture. If you by any chance forget to choose this option then you will have to chamfer edges withe sand paper, knife of file in later stages.
Gerber files contain " JLCJLCJLCJLC" to silk layer. You can specify a location of the order number, select the "Specify a location" option when you place an order. Only if you order via JLCPCB
. Use a temperature-controlled soldering station and quality solder. Take care not to leave solder bridges as any short circuit will most likely lead to failures
This card does not use back PC metal bracket


File type File name File size Last modified
ISA 8bit card Schematic v1.0 schematic_isa8bit_protomini_v10.pdf 82 kB 20/06/2021
ISA 8bit card Schematic v1.0 schematic_isa8bit_protomini_v10.jpg 154 kB 20/06/2021

Design Files

File type File name File size Last modified
PCB layers v1.2 pcblayers_isa8bit_protomini_v12.pdf 202 kB 16/11/2021
Gerbers 102 x 98 mm, 2 Layer FR4; v1.2 110 kB 16/11/2021


click on pictures to enlarge
IBM PC XT8-bit ISA Prototype PCB Card mini
IBM PC XT8-bit ISA Prototype PCB Card mini
IBM PC XT8-bit ISA Prototype PCB Card mini
IBM PC XT8-bit ISA Prototype PCB Card mini
IBM PC XT8-bit ISA Prototype PCB Card mini
IBM PC XT8-bit ISA Prototype PCB Card mini

Versions and revisions

This section lists the project version and revision history.


■ Various cosmetic updates
■ Various silkscreen updates

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