Tag Archives: CPLD/FPGA

ZX LCD

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

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

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

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

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

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

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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LCD + FPGA

After few weeks of experiments and one dead FPGA chip I finished about 1/5 of my LCD project. At last I tuned all LCD timings and LCD screen can display image from “video RAM”. For this moment “video RAM” is … Continue reading

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Cyclone II

As I mentioned in previous posts, one company supplied me by few Altera Cyclone II (EP2C5T144C6N) FPGAs. All these chips were soldered to some rejected circuit boards. Board were damaged by improper soldering, mainly by overheating and PCB track unstuck … Continue reading

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Death of FPGA

I was planing big article about FPGA chips and was testing all circuits when suddenly connected on Altera Flex I/O pin to LCD bias power supply. This was the end of my Altera FLEX. Here is the picture of my … Continue reading

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