PJ5 TTL CPU Project
Here you’ll find details and updates about our home built TTL based CPU
Latest from the Blog
Program Counter & Clock Modules
Finally after a long wait and a lot of thinking and debugging we have a fully working Program counter and revised Clock module! First up here’s a quick video of the program counter, showing the JUMP and also the interrupt handling. Now this was a lot of work, and I’d suggest to anyone thinking ofContinue reading “Program Counter & Clock Modules”
Multiplier
We have the multiplier PCB done, this is an 8bit by 8bit multiplier which gives out a 16 bit result. It’s unsigned and based on a Wallace Tree multiplier. The primary reason for using this design is that it keeps the number of steps, and hence gate delays, down to a minimum. The down sideContinue reading “Multiplier”
Program Counter, the revenge
This program counter has turned into a bit of a saga, but the PCB layout is finally complete. Firstly the 8 DIL chips with digits on are actually going to be some TIL311’s that I got as new old stock from eBay, I just couldn’t find a model so I made one up from aContinue reading “Program Counter, the revenge”
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