The Spectravideo SV-318
So I was given this Spectravideo SV-318 quite some time ago (thanks Bryce). It’s quite a cool looking computer. The red joystick knob on the right is an interesting feature.
Emulating ROMs and floppy drives in MSX
So that Galaksija I made up was quite fun to build and get going. And I’ve found a few other homebrew projects like that. Recently I’ve built an Amiga 500++ (thanks Rob), and then I came across the Omega MSX2 . Sergey has designed a set of boards that make up an MSX2 home computer […]
Making a Galaksija
A few months back I came across an ebay ad for a circuit board for a Galaksija. I had never heard of it before. The original Galaksija came out in 1983 in Yugoslavia. The Galaksija wikipedia page has a lot more info and the spetsialist-mx.ru site has a big section on it (in Russian). That […]
Acorn Electron ROM Emulation with an STM32F4
This is really part 2 of Emulating a hardware ROM in real time with an STM32F4. In that post I used a cheap STM32F407 board to emulate some ROMs and some IO ports for an Acorn Electron. ie. The Electron thinks it has a bunch of hardware attached, but it’s simply the STM32F407 board pretending to be […]
Repairing an Acorn A3000
The Acorn Archimedes A3000 came out in 1989. My vague recollection of the era is that the Amiga 500 was really popular around then, and even though the A3000 was a lot more powerful, it was in a price bracket that made it a lot more expensive. I probably didn’t know how much more powerful […]
Amstrad CPC ROM emulation using an STM32F4 – Part 2
So in part 1 (Amstrad CPC ROM emulation using an STM32F4) the code I had for emulating a ROM (and some IO) with a cheap STM32F4 board for the Amstrad CPC 464 ran in a continuous polling loop. The code just watched _ROMEN and _IORQ going high and low, and acted appropriately. The (sort of […]
Amstrad CPC ROM emulation using an STM32F4
UPDATE: There is a ‘part 2‘ to this article. In that I use interrupts, instead of the polling technique shown below So, in emulating a hardware ROM in real time with an STM32F4 I hooked up a cheap US$10 STM32F4 board to my Acorn Electron to act as both a sideways ROM board and a sort of […]
Emulating a hardware ROM in real time with an STM32F4
UPDATE (20190523). There is a ‘Part 2’ of this article in Acorn Electron ROM Emulation with an STM32F4 that describes using interrupts to emulate ROMs. The article below involves using ‘polling’ to perform a similar function. I remember reading dhole’s Emulating a GameBoy Cartridge with an STM32F4 some time ago thinking that it had a lot […]
Using TZXDuino to play UEF tape images
TZXDuino is a cool Arduino project that is basically a standalone hardware cassette audio playback unit for old computers. You hook up an Arduino, a microSD card adapter, an I2C LCD display and 5 buttons. Load a microSD with lots of game dumps, and hook that up to the audio input of your ZX Spectrum […]
BBC Micro Model B
I recently bought a BBC Micro Model B. It sold ‘as is’ and I had no idea if it worked. The case was very yellow. It came with a 5 1/4″ drive, cassette player, several books and original versions of Elite on disk and cassette. It did not work, and ended up having a number […]