This post covers some topics around one of the retro machines I have. They helped me form some thoughts on additions I might want to add to mine.
HDMI out on a Mac
- [Wayback/Archive] My little guide on RGBTOHDMI installed on Classic, Plus, etc. | TinkerDifferent
- [Wayback/Archive] RGBtoHDMI for my Mac SE/30, how to wire up – YouTube
- [Wayback/Archive] GitHub – hoglet67/RGBtoHDMI: Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
The RGBtoHDMI interface converts the “digital” RGB video signal from the BBC Micro or Electron to HDMI compatible with most modern TV/Monitors. The interface comprises a Raspberry Pi Zero and a specially designed Hat containing a small CPLD. Custom firmware on the Raspberry Pi, in conjunction with the CPLD, is able to correctly sample each of the Beeb’s video modes to give a pixel-perfect rendition.
- [Wayback/Archive] RGBtoHDMI for a SE/30 (settings from Plus and Classic 1 won’t work) | 68kMLA
Needs a Raspberry Pi, but looks very interesting.
256 shades of grey
Back in 2022, someone started doing an amazing thing: reverse engineering and rebuilding a 256-grey/color video card for the Macintosh SE/30 PDS (Processor Direct Slot).
A very interesting start of a long journey with the result that a few people could actually play around with it. Hopefully by now more have been produced, but be aware: this is a hobby of the designer, so unlike some other hardware: do not expect high numbers of these boards to become available.
Long thread in – for now – 14 pages of which I think below are the most important excerpts:
The Wiert Corner - irregular stream of stuff 