Marten Electric 電気テン @ Home

IBM PC AT 16-bit ISA Prototype PCB Card

Introduction

I have originally designed this prototypng PCB card for few of my projects, but this turn out so well that I have now posted all schematic, gerber files and documentation to fellow enthusiast such as yourself. Perhaps (and I hope) content in this obscured corner of interwebs will inspire you to start your own projects.

You can use these card in industry standard ISA XT 8-bit or AT 16-bit slot which is backward compatible. Card has been designed according to IMB ISA standard and can fit rear panel holder and will fit to classic PC XT or AT. PCB contains about 1600 holes in 0.1" matrix, enought to create more complex projects such as IDE or floppy card. World is your oyster in this case. To make the most of it use card in conjuction with IBM PC XT 8-bit ISA Bus Riser Extender Card to raise PCB 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.

ʕっ•ᴥ•ʔっ
Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 4.0 International license. CC-BY-4.0
I have created content on this website free to use for personal, educational and commercial purposes. If you like or use my work, please mention me or perhaps consider a donation.

EDA preview

click on pictures to enlarge


3d render v1.0

PCB design layout

Specifications

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: 191x99mm
Board Thickness: standard 1.6mm fits in standard ISA PCB edge connector
Pitch: 2.54mm (100.00 mils)
Hole matrix: 75x29pin + 11x4pin; (2190 prototype holes in total)
Hole size: 1.00mm
Board Connector / Footprint: 98pin 2x31pin + 2x18 ISA Bus connector with 45° chamfered edge
Copper Thickness: 35um
Card weight: 100g

Bill of materials

Identifier	Value	Qty	Notes
Printed Circuit Board	16-bit ISA prototype PCB 199 x 99 mm 2 Layer FR4	1	v1.0
Hardware	PC rear bracket	1

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
■ Jokes apart; when using a riser extender test card, it is important to exercise caution when working with sensitive electronic components. Users should ensure that the device is turned off before inserting or removing any cards under test. This precautionary measure can help prevent damage to the components and the system.

Schematics

File type	File name	File size	Last modified
ISA 16-bit extender Schematic v1.0	Not available for this project	-	-

Design Files

File type	File name	File size	Last modified
PCB layers v1.0	pcblayers_isa16_proto_v10.pdf	200 kB	18/04/2023
Gerbers 140 x 100 mm, 2 Layer FR4; v1.2	gerber_isa16proto_v10p.zip *	252 kB	18/04/2023
Solder paste stencil	Not available for this project	-	-

* gerber file is generated for PCBWay fabrication, but should work with other manufacturers.

Photographs

click on pictures to enlarge

Versions and revisions

This section lists the project version and revision history.

v1.0

■ Prototype

Last page update: 06 June 2023

Back to top or Back to index page