Archive for the ‘retro’ Category

March 2022


Pupdate Although it’s looking ready to snow outside as I type, we’ve had some glorious summery weather in March, which means plenty of time outside running around for the boys. But the picture that grabbed most attention was this one: People thought we’d got another sausage dog, but it was just the boys hanging out […]

My original attempt at an RC2014 Mini driver started out as pretty much a copy of the gsz80 driver, with a find/replace of ‘gsz80’ with ‘rc2014mini’. But as the MAME team reviewed my pull request, they surfaced a bunch of problems. Firstly I didn’t have the correct memory map. The RC2014 Mini only has 32K […]

I mentioned in my previous post Grant Searle Simple Z-80 Machine on MAME that the gsz80.cpp driver was like finding a Rosetta Stone for MAME. In this post I’m going to go through it block by block to explain how I parsed it, and how it enabled me to figure out how to write a […]

In my RC2014 Mini on MAME post this was one of the things I was planning to try next, and once again there was an existing driver that had most of the pieces in place – evmbug.cpp implementing the TMS 9995 Evaluation Module (aka TMAM 6095). My first job was getting the existing driver working, […]

TL;DR Getting an RC2014 Mini working based on the Grant Searle Simple Z-80 Machine driver was pretty trivial, but it’s been enough to get me going with MAME development and persuade me to try some other things. Background I know there are already emulators out there already for the RC2014, I’ve used EtchedPixels/RC2014 a bit […]

TL;DR I’ve been wanting to try emulating some RC2014 stuff using MAME for some time, and I think I’ve found my way into it with the MAME driver for Grant Searle’s Simple Z-80 Machine. Background Back when I was making my TMS9995 on RC2014 system part of my adventure into the lands of TI-99/4A fans […]

Background This post has been a long time in the making. But a couple of things happened in the past week that prodded me to finally write it. Firstly there’s this epic thread from Shahid Kamal Ahmad about becoming a games developer in the early 80s. And then there was the awful news of the […]

May 2020


Inspired by Ken Corless’s #kfcblog I’m trying out monthly roundup posts for stuff that didn’t deserve a whole post of their own Retro I wanted to try out RomWBW, but didn’t fancy going down the route of making more RC2014 modules, so I got myself an SC131 kit from Stephen Cousins. It’s wonderfully cute and […]

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 […]