Posts Tagged ‘RC2014’

March 2022

31Mar22

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, […]


February 2022

27Feb22

Pupdate As we neared the end of the month it was finally warm enough for the boys to walk without their coats, and whilst they might look cute and snuggly in the coats they seem more energetic and free without them. Pi Stuff – MWC Demo All of that time spent playing with Raspberry Pis […]


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 […]


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, […]


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. […]


I already wrote about my plans to get a TMS9995 running on RC2014, so this is the post about how I put together an RC2014 version of Stuart Conner’s TMS 9995 Breadboard or PCB System. Planning Taking a look at the TMS9995 pinout and the RC2014 module template it became clear that there was no […]