Break Into Program

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Software developer & electronics dabbler Restoring & programming vintage computers from Acorn Atom to ZX81.
Twitterhttps://twitter.com/BreakIntoProg
Bloghttp://www.breakintoprogram.co.uk
Githubhttps://github.com/breakintoprogram
YouTubehttps://www.youtube.com/BreakIntoProgram
Break Into ProgramFeb 8, 2023
Bought a Tatung Einstein last March, and only just got around to firing it up. It was bought with the intention of transferring a box of disks given to me by Tim Follin that contain the source files for some of his SID and AY chip music...
Break Into ProgramFeb 8, 2023
What the heck? Currently unable to send tweets from any of my accounts.
Break Into ProgramFeb 3, 2023

One of my biggest regrets is the decision 30 years ago to give away all my programming reference books, assuming I'd never need/want them again. I've been looking out for this one for a couple of years now: it's like the proverbial hen's teeth. Whilst it's not as influential as the seminal "Programming the Z80" (Rodney Zaks), it is the book I could afford as a 15-year old, and served me well for a few years, developing games on the ZX Spectrum and Amstrad CPC.

Anyway, was checking on the progress of an order on Amazon and threw up a search and there was a copy for sale on World of Books (Amazon Marketplace) for £3.20. Kerching!

So I'll own the holy trinity of books that got me into assembly language programming:

- Mastering Machine code on the ZX80/81 by Toni Baker
- The Complete Spectrum ROM disassembly by Frank O'Hara and Ian Logan
- That

I'm doing my happy dance now.

Show threadBreak Into ProgramJan 18, 2023
Bit of a mind bender trying to work out how the extra instructions fit in the standard Z80 opcode map; here's my scribbled notes for the block instructions.
Break Into ProgramJan 18, 2023
Spent the last few evenings working on my Agon eZ80 disassembler with my coding buddy. It's almost there now; can decode all Z80 and eZ80 instructions. Just missing the extra eZ80 addressing mode modifiers.
Break Into ProgramDec 19, 2022
Been developing more apps for the Agon too - working on porting the Z80 I wrote for the BSX to the Agon, converting it to C and adding in the extra eZ80 instructions.
Break Into ProgramDec 19, 2022
Got a package today from Olimex, their variant on the Agon board I've been developing the firmware for.