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8-bit computer from scratch.

The making of...

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CDP1802 Computer is ready

My CDP1802 Computer project may now be considered ready. I have implemented all the features I wanted, and all further Continue reading

Two UART interfaces, software features.

Despite having recently very little time for playing around with the COSMAC ELF computer, I`ve managed to add some features Continue reading

COSMAC ELF based modular computer

I can`t actually remember when I stumbled uppon the famous CDP1802 based COSMAC ELF project. However I do remember that Continue reading

Multimedia expansion card for 6507 SBC

Introduction I`ve decided to make a multimedia expansion card for my 6507 SBC. The card upgrades the system with TMS9118 Continue reading

Another (this time smaller) 8-bit computer from scratch – 6507 SBC !

Inspired by the MOS KIM-1 and 8051 based AVT2250 computer that I used to own many years ago,I`ve decided Continue reading

Driving VGA monitor with MDA/Hercules card

I recently saw Rich Wareham`s video, where he used 6845 CRTC chip to generate VGA-like signal, enough compatible to light Continue reading

C-Z80 Computer live on TV !

The title of this post shure looks promising, but really it only means that I`ve managed to use a regular Continue reading

CP/M 2.2 Up And Running.

C-Z80 Computer is officialy runing CP/M 2.2 for a few weeks now: As soon as the hardware modifications described in Continue reading

CP/M Compatibility Card

The interface to 8-bit ISA card for my C-Z80 Computer is now ready. I`ve addes some additional jumpers for setting Continue reading

80 column display – a new solution.

I`ve recently spent some time trying to find a way to improve my VGA display board in order to make Continue reading