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I put together a description of implementing fine horizontal scrolling in BASIC with assembly code executed during the vertical blank. This is a pretty high-level description and is directed at those learning this for the first time. A simple demo is provided with BASIC code and assembly code explained. An ATR file is provided. Fine horizontal scrolling has a lot of moving parts and can be hard to understand for those who have not yet mastered it. I hope someone finds this take on it helpful. Comments welcome!

 

Fine horizontal scrolling post from Atari Projects

Edited by scitari
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Thanks for this, and for your website! I have found it very useful and actually often just pure nostalgic fun.

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Thank you for sharing, your website is very informative. I love rereading about the computers that started my fascination about technology.

 

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