Blogs

All members are invited to blog on Applefritter. Weblogs should generally be of a technical nature and should be written in such a way as to still be readable and useful 50 years from now. Please do not embed outside media. Images and videos can be uploaded via the Media Browser. Files should either be attached to the blog post or uploaded to the file libraries.

When you post to your blog it will appear on this index and on your personal blog page. Once you've made a few posts, contact me about having a graphic added on the top of this page.

UNCLE BERNIE'S CODEBREAKER GAME

Submitted by rob101 on October 29, 2023 - 1:26pm

A preview of the the readme.md file that will be hosted on GitHub, along with my Python implementation of the game known as UNCLE BERNIE'S CODEBREAKER GAME

Tags: 
games

Apple /// Reset Logic & Apple II Emulation Flaws

Submitted by MacFly on October 8, 2023 - 4:18pm

AppleIII_Reset_Schematics.png

I recently ported software from the Apple II to Apple III and encountered an interesting topic. It's a corner case, but in my opinion a typical example. It shows how the Apple III design was sometimes (maybe unnecessarily) complicated. And how features introduced Apple II compatibility issues.

Tags: 
6502 APPLE III NMI RESET

The (not so) subtle differences between 6502 assemblers...

Submitted by MacFly on July 25, 2023 - 6:24pm

Oh man... I was not aware of the pitfalls when switching between different 6502 assemblers. Until now, when I tried to reuse an old assembly listing (from Apple II assembler/editor) with the ca65 cross-assembler...

Carefully compare the definition of the > and < operators to obtain the low or high byte of an 16bit address - in these two excerpts from the respective manuals...

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