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IBM PCjr 512k Memory Expansion Board

A small board that adds 512k to the IBM PCjr

daves-dev-labDave's Dev Lab
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This board adds a single 512k SRAM to the sidecar slot to expand the IBM PCjr memory from 128k to 640k

pcjr-sram-revb.zip

Eagle CAD Design Files - This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. CC-BY-NC 4.0, Copyright (C) 2020, David Anders. All Rights Reserved

Zip Archive - 41.81 kB - 05/14/2020 at 22:19

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pcjr-sram-revb.pdf

PDF Schematic - This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. CC-BY-NC 4.0, Copyright (C) 2020, David Anders. All Rights Reserved.

Adobe Portable Document Format - 18.36 kB - 05/14/2020 at 22:18

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pcjr-sram-revb-gerbers.zip

Gerber PCB Files - This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. CC-BY-NC 4.0, Copyright (C) 2020, David Anders. All Rights Reserved

Zip Archive - 70.85 kB - 05/14/2020 at 22:18

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RW wrote 05/15/2020 at 02:47 • point

Nice, I was tempted when I saw PCJr boards cheap a couple of months back, but it was spendy to bring them up to a half reasonable spec to run anything.

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Dave's Dev Lab wrote 05/15/2020 at 02:54 • point

indeed not too bad these days with the Computer Reset surplus out there... https://www.bgmicro.com/1B1606.aspx

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