Retro Computing ⁽¹⁶⁾

So, yeah, I have a thing for transputers, don't ask me why, I don't know. I've always been fascinated.... Anyway, I finally managed to get some reliable and repeatable comms between my 6502 tower and a T425 TRAM. Here you can see the data going…

I have been tinkering with various bits of the PC6502 computer system in between looking after Suzi (who is getting better slowly, but we still have a couple of months of hard work ahead of us). Previously I was able to show the OPL3 Sound…

In my previous blog entry I posted about the 6502 computer PCB I made, since then a lot of progress has been made. A lot. Firstly the timing issue has been overcome, the 6502 will now happily run at 14MHz (tested up to 17MHz), the…

Well the PCBs arrived and I decided to build up the CPU one slowly, not building the full thing. I'm glad I didn't. Eventually after a lot of messing around with CPLD and ROM code I got something booting, it's the Grant Searle ROM, but…

It's been a while since I wrote, a lot has been going on. Firstly, the Transputer saga, I got a PCB from Oscar Toledo (https://github.com/nanochess/transputer) and confirmed that my TRAMs did indeed pass the tests with his card. However they did not with mine. Then…

I finally managed to get data into and out of the transputer module (TRAM). To do this I used an Arduino Micro I had (as it's 5V) and some breadboard. Now the TRAM pulls 800mA at 5V and the breadboard struggles with this, so I…