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Speed-coding for the 6502 – a simple example
A real-life example showing how to scale an image in either 10 seconds, or 0.2 seconds, using 6502 assembly.
2025/08/28 Continue reading... -
Aligning cc65’s Apple2 runtime to hardware capabilities
It is now possible to use lowercase and 80 columns on the cc65 apple2 target. This article explains the changes.
2025/07/06 Continue reading... -
Yes, the Apple II MouseCard IRQ is synced to the VBL
Some people thought it was not, but experience showed it is. Now theory joins practice and we can collectively be sure. A deep dive into synchronisation via cycle counting.
2025/05/08 Continue reading... -
Beta releases of Shufflepuck for Apple II
Dear lovers of old computers, it is with great pleasure that I feel I can push the first beta version of my Apple II port of the famous Shufflepuck Cafe.
2025/04/19 Continue reading...