Tag Archives: CPLD/FPGA

XRF repair

Posted on December 6, 2024 by Administrator

(AI translated) Continuing while still feeling under the weather (symptoms suggest COVID, but PCR says no), I took another look at the old XRF. I have already somewhat explained how it works and mentioned that the “black fin” isn’t trying … Continue reading →

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2022 is here!

Posted on December 5, 2024 by Administrator

(AI translated) Well, it’s New Year again. Probably, 2022 in a row since some event. Or 5782. Or 1443. Or Reiwa 4. Or maybe 7530? Or maybe 4720. For me, it’s probably about the 50th number… So, the number doesn’t … Continue reading →

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My 484 enemies

Posted on December 4, 2024 by Administrator

I have 484 enemies… Solder balls, 0.55mm diameter. Just testing my first 4 layer PCB with some second hand FPGA chips. I am using old solder paste to build new balls… but with bad result. Two pins are missing (from … Continue reading →

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ZX LCD

Posted on March 26, 2020 by Administrator

After building ZX Spectrum clone in CPLD I ported hardware code to another project and this is a bit simpler, but it uses some mono LCD from old copy machine. Now I used only one CPLD, but I added an … Continue reading →

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ZX Spectrum inside CPLD

Posted on March 24, 2020 by Administrator

I found an old ZX Spectrum clone made in Soviet Union in the 90’s. It was my computer, I wrote several programs on it and also, I wrote drivers for Epson printer on this hardware. This model has Soviet chip … Continue reading →

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Testing Commodore 6526/8520 copy in CPLD

Posted on March 21, 2020 by Administrator

There are quite expensive obsolete chip from various Commodore computers and peripherals- CIA/PIA MOS 6526 and a bit changed 8520 used in Amiga computers. This is a “complex” peripheral interface adapter chip for 6502 processor or 68K chipset. It is … Continue reading →

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My collection of old computer

Posted on March 1, 2020 by Administrator

For a long time, I collected a small collection of computer hardware. Here is the link to my Old Bits Collection.

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RGB matrix: organization

Posted on July 11, 2015 by Administrator

This post is about structure and organization of big RGB LED matrix. Just notes to remember how it works, as paper notes tends to be lost. And it is much easier to find information back in the internet compared to … Continue reading →

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Cyclone III

Posted on March 13, 2010 by

After various financial speculations on the Internet and in real life, I gathered some money and bought through eBay auction Altera Cyclone III Starter Board. Another “starter board” is rambling somewhere in the post. I appreciate deeply all my countrymen … Continue reading →

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Cyclone 1

Posted on March 9, 2010 by

I have torn a board with Altera Cyclone chip from a defective plasma television. That’s EP1C3T100C8  chip: one hundred legs, but only 65,2910 logic elements, 59904 bits of memory and one PLL are intended for users. While my board production technology is … Continue reading →

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