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Archive for the computer tag


How to use a computer – The Squid Zone

Equipment, Operating, Security, Technology

A good reminder for everyone…

This is a primer for anyone searching the web looking for tips on how to use a computer.  The language is direct, and intended to be clear and unequivocal. 1. A computer is a dangerous power tool, treat it accordingly As computers become ever more a part of everything we do, there is a tendency […]

Source: How to use a computer – The Squid Zone


4 bit computer built from discrete transistors

Equipment, General, Technology

I started this project as an attempt to teach myself about how computers worked. As such comments, useful links, or anything else related would be appreciated. Prior to this my experience in electronics was mostly microcontroller based. The computer is perpetually half done (it could be more it could be less, I only design the logic for the chunk I’m working on) but currently consists of about 300 transistors. I’m pretty sure that the computer follows ‘Harvard architecture’ (corrections welcome) as the RAM and ROM are strictly segregated. 4 bit is used loosely data width is 4 bits but instruction width is 8 bits as some instructions include 4 bit values. some stats: RAM: 16 nybbles (dictated by address register width) ROM: 16 bytes (dictated by program counter width) clock speed: more than one (the computer is currently not clocked as much of the sequential logic has yet to be built)

Source: 4 bit computer built from discrete transistors