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Originally published in Queue vol. 8, no. 4
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(newest first)

Martin Argerami | Tue, 15 Jan 2013 02:47:52 UTC

I spent unforgetable glorious years in the early 80s hacking the TRS-DOS, when I was a teenager. Thanks for bringing back those memories!

George A. Mihaila | Thu, 15 Jul 2010 20:48:57 UTC

Having learned programming on a Sinclair ZX Spectrum machine back in the eighties, I really enjoyed this article. I have played with a few emulators too and was impressed by the acuracy of some of them (Warajevo is my favorite one for Windows, and Fuse for MacOS, both available from

One irony, in this page, the code listing for the Z-80 cycle waster is missing the stdio.h from the include statement because the browser is interpreting the stdio.h in angle brackets as an (invalid) HTML tag. This is yet another instance of trying to write an accurate emulator: in this case it is an HTML and Javascript emulator for rendering plain text in a browser (look at the source of this page to see how complicated this is).

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