Category Archives: Anything

Unsorted stuff. Regular blog posts.

HTTPS testinis pranešimas

Testuojam https://www.savel.org

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Power standard for my computer collection

I have small collection of vintage computers. Several computers do not have PSU, other one have very specific ones. The problem is with some that looks like “standard”, have same connector like others, but have reversed polarity. Like ZX Spectrum … Continue reading

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How to print, preview in VB Studio Express

There is classic basic program for Commodore 64 computer to print maze on the screen. This program random prints “/” and “\” character on screen. I wanted to implement same program on modern computer and print the result. Not only … Continue reading

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Quick hack – optical mouse for Amiga (or Atari) computer

I was testing old Amiga computer and noticed, that somewhere I lost the mouse. It is proprietary mouse for Amiga computer, it even does not work with Atari ones. The mouse itself is very simple- only raw quadrature information is … Continue reading

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Permanent link to Atari 1088XEL SMD

Permanent page for Atari 1088XEL SMD project.

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TI-99/4A

Whenever I talk about designers of the ZX Spectrum computer I use to say that they were smoking weed. Now I acquired one computer from another family of computers, TI99, I can tell that Texas Instruments designers not only smoked … Continue reading

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ZX interface 1 and Microdrive

I collected several ZX Spectrum series computers, but I don’t have any fancy peripherals. After several attempts I managed to buy ZX Spectrum Microdrive and interface 1 for it. As always with ancient hardware it is working a bit, but … Continue reading

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Sinclair QL – modifications for EPROM

I have Sinclair QL, “issue 5” with 3 EPROM chips. One of the chips is riding on the other chip. And yes, it is the original solution from Sinclair engineers- they were pressed by Apple computers new product and they … Continue reading

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Real easy Video fix for ZX Spectrum +2 (gray, “Toast Rack”)

I bought a ZX Spectrum +2 gray (toast rack) for my retrocomputer collection and it was the fail. The video output was bad and also there is a serious problem with RAM or ULA. But this article is about making … Continue reading

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Printer from calculator, part 2

Continued from part 1. The printer from the calculator is a neat toy, but we want a real USB printer. So, using my new STM32F103 CubeMX USB printer class for communication with the host computer and some tricky INT based … Continue reading

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