VECTORLIST - The Mailing List For The Technical Discussion of Vector-Based Arcade Games

October_1999
Re: vector programming...


From: Josh McCormick ( )
Date: Fri Oct 01 1999 - 22:08:06 CDT


> This sounds like a disassembler I wrote eons ago that actually does a code
> walkthrough. Here's a sample from an Asteroids dump:

> 7d01 9d 00 01 STA $0100,X ; Stack page

Hmmmm... had to comment on this line of code. Looks like Atari didn't
respect the stack page as being holy. Maybe they figured that $0180-01FF
was good enough to the stack. In pouring through the Tempest code, I see
numerous game variables that are stored between $0100-0180.

Have you seen the same thing w/Asteroids?


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