gasman / spectrum-sizecoding

Resources from my ZX Spectrum sizecoding seminar at Lovebyte 2021

ZX Spectrum sizecoding

Resources from my seminar at Lovebyte 2021.

Seminar on YouTube

Essential tools

• Fuse - ZX Spectrum emulator for Unix, Mac OS and Windows
• Pasmo - Z80 cross-assembler
• zmakebas - converts text files to tokenised BASIC in .tap format

Files included here

• hello.asm - the finished XOR-pattern intro
• hello.bas - BASIC launcher for the intro
• Makefile - build script for intro (edit and change program paths as appropriate)
• border.asm - the simplest possible program that does something: turn the border red
• screen.asm - slowly fill the video memory, to demonstrate the screen layout
• upde.asm - routine for finding the address of the next pixel line in screen memory

Books

• Mastering Machine Code On Your ZX Spectrum by Toni Baker
• Programming The Z80 by Rodnay Zaks
• The Complete Spectrum ROM Disassembly by Dr. Ian Logan and Dr. Frank O'Hara - transcribed as text and PDF

Other resources

• ZXNumber by Neon - script for encoding numbers in floating-point notation