Category Archives: 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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Riddle

This is starting post about very interesting project. Try to guess what it is? This PCB is populated with serious stuff. Big square chip is Altera Cyclone EP1C6T144C8, 30 pcs of MBI5026CD, 8 pcs of HT04 (standard chips), 24 Fairchild … Continue reading

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