In this episode I cover nine pages of the book! But what a nine pages - lots and lots to learn here. I walk through using the mouse and numpad in place of paddles, a bit about merlin, a bit about basic, and a bit about calling into firmware.

In the video, I talk a bit of nonsense, too. Workable nonsense, but naive and only partially correct. When I talk about OBJ no longer working, that isn’t technically correct. It works, but it doesn’t work on addresses as low as our usualy $300. Also, once it’s no longer being used, we can follow the path laid out by the author, and just BLOAD instead of BRUN, then the RTS will be fine and call 768 will work as expected.

A careful read of pg. 35, section A Note about BRUN and COUT is all that’s required to iron this out.

tldr - don’t use OBJ, leave ORG $300, don’t use BRUN, use BLOAD followed by CALL 768.

Not a big whoop, but worth noting. In future installments I’ll use the correct approach.

Here’s a link to the playlist:

https://www.youtube.com/playlist?list=PL_z8XUfqFSXHvJ5E5r80ZmMN7LRcCI0Zx

Enjoy!

post added 2025-10-18 07:18:00 -0600