Author Archives: Administrator

About Administrator

I am owner of this site.

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

Posted on October 9, 2021 by Administrator

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 →

Posted in Anything, Vandalising | Leave a comment

8-bit font tool: editor, rotator, mirror

Posted on September 4, 2021 by Administrator

This is small tool writtent in Visual Studio Express VB. Main purpose of this tool is to find 8 bit wide fonts and graphics in various ROM, firmware files and export to binary or C source file. Tool can edit … Continue reading →

Posted in MCU | Leave a comment

Permanent link to Atari 1088XEL SMD

Posted on April 25, 2021 by Administrator

Permanent page for Atari 1088XEL SMD project.

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TI-99/4A printing new key

Posted on February 28, 2021 by Administrator

Modern 3D printers allow us to print at tremendous quality and resolution. And some Chinese ones are quite cheap. My one of Texas Instruments TI-99/4A computers has a problem- due to a bad package and careless shipping it lost three … Continue reading →

Posted in Personal | Leave a comment

TI-99/4A

Posted on February 21, 2021 by Administrator

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

Posted on February 21, 2021 by Administrator

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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PS2 keyboard for ZX Spectrum (or clone)

Posted on December 26, 2020 by Administrator

ZX Spectrum and other computers of that period use proprietary keyboards with direct connection to some specific chip or connected directly to computer bus. Old keyboards are damaged from elementals or time, and sometimes are not very user friendly compared … Continue reading →

Posted in FPGA, MCU | Leave a comment

Sinclair QL – modifications for EPROM

Posted on December 19, 2020 by Administrator

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”)

Posted on December 19, 2020 by Administrator

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

Posted on October 4, 2020 by Administrator

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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