An OS that will run 800-only AND XE carts?

[a8isa1]

Since you've changed the cart to a non-diagnostic, the OS zeroes the hardware registers anyway.

 

The cart would probably work fine if that entire subroutine was skipped.

Actually when changing the option byte didn't work I changed it back.

 

I played one session and did not notice any problems.

 

Now I know what to look for in the other images that didn't work initially.

 

Thanks again!

 

- Steve Sheppard