Building Sergey’s Micro 8088 and ISA 8-bit Backplane

In my last retrocomputing post, I tackled the problem of Repairing my CGA video card following quite a bit of foolish childhood damage.

In this post, I’ll document the fabrication of Sergey’s Micro 8088 processor board and ISA 8-bit Backplane. The hope is that I can get my CGA video card working with Sergey’s two boards, and combine them into a functional retrocompter. Continue reading

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Repairing my CGA

Following on from My Introduction to Retrocomputing, I had found myself in possession of an IBM CGA card numbered “1501981APS”. At some point in my childhood, I had damaged the card by pulling traces off the PCB. I’m still annoyed at myself for that. Nonetheless, I still want to repair the card and attempt to get it working with Sergey’s Micro 8088. Continue reading

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My Introduction to Retrocomputing

A friend recently introduced me to the world of Retrocomputing. Specifically the work of Sergey Kiselev. Sergey has evidently dedicated many years to the creation of completely open-source designs paying homage to early computers such as the IBM PC-XT.

One such system is Sergey’s Micro 8088 processor board paired with Sergey’s ISA 8-bit backplane. A friend of mine was interested in building a system around both of these boards. Being an open-source design, the PCBs must be ordered by engaging with a PCB fabrication house. The minimum PCB order was in units of five, so I was offered one of each board to maybe build a retro system of my own. Of course I said yes. But what would I do with a system of my own? Continue reading

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Ublox GPS Click EEPROM Upgrade

The GPS Click (MIKROE-1032) is a great breakout board from MikroElektronika featuring the Ublox LEA-6S GPS receiver. The “Click” format allows the tiny Ublox module to be plugged into a breadboard for easy prototyping.

I’ve been very satisfied with the module except for one thing; I have not been able to make permanent configuration changes that survive a power loss event. It seems that every time the module loses power, the settings revert to factory defaults. This can be annoying when trying to use the module with different serial baud rates. Armed with this frustration, I tried to find a solution. Continue reading

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