I just posted the mac and windows binaries for dgemu, my digital group emulator.
As soon as I have a chance to clean up the source code a bit, I will release that as well. Also will most likely build a linux version as well.
dgemu emulates a dg system with a Z80 processor card, 64k of memory, a 64 or 32 column TV card, cassette interface, and ASCII keyboard.
I used Marat Fayzullin’s excellent Z80 emulator code for the Z80 processor core.
Software is loaded from tape images which I converted from audio files from Bryan Blackburn’s bytecollector site, using a suding format conversion program which I will also release shortly.
Please try out the emulator for yourself and feel free to contact me with any questions. There is no speed regulator on dgemu right now so some of the programs run ridiculously fast (especially Lunar Lander!) but that will be fixed soon.
Please keep in mind that this is a work in progress. More updates to follow shortly..