Archive for the ‘retro’ Category

It turned out that my TMS9995 system had no modules in common with my CP/M system, as it’s using the ROM and RAM modules left over from the CP/M upgrade. All I needed was another backplane to be able to run both at once. SC116 3 slot backplane As the TMS9995 uses three modules: CPU, […]


Playing Tetris on my Gigatron reminded me that I still had my original Game Boy in a box in the loft, which had last been out when my kids were too young to remember. I found it in a sorry state – the screen cover had fallen off, and the case had turned orange. Sadly […]


Having got a TMS9995 system on RC2014 working as far as the monitor I still wanted to run BASIC and Forth. I’d not been able to get my pageable ROM card working, and the switchable ROM module is too small. But it’s too small because it’s designed to carve a 64K EPROM into 8K pieces. […]


After building my RC2014 CP/M system and Gigatron I decided to dig through the pile of old integrated circuits I stashed away before leaving home thirty years ago. I don’t remember the source, but it seems that I stripped down 4 systems (which might have been something like data loggers) that had a reasonably complete […]


I’ve had a bit of a binge on this topic over the past few weeks, putting together some kits that I bought ages ago. My RC2014 came first, and then this, a Gigatron. Why? Ken Boak did a lightning talk on his Gigatron at OSHCamp 2018, and it sounded super interesting. What is it? A […]


This is the first post in a short series (with perhaps more to follow as I go deeper). Why? I came across the RC2104 at OSHCamp 2018 where I got to meet its creator Spencer Owen and make one of his Mini kits with my son. When he put his Full Monty kit on sale […]