Subject: Re: [stella] What's the purpose of address $29E? From: "Dennis Debro" <dennis@xxxxxxxxxxxxxxx> Date: Fri, 3 Dec 2004 04:24:55 -0800 (PST) |
Hi there, > Complete 2600 memory map at http://web.mit.edu/ecwilkso/www/VCS_hardware. > > Once again (but probably not for the last time), I'll point people to the > *complete* VCS memory map: http://web.mit.edu/ecwilkso/www/VCS_hardware > There you'll find everything you ever wanted to know about memory location > $xxxx. I knew I saw this somewhere. Thanks for the link again ;-) > So > the programmer might have decided it was better to test $285 rather than > miss INTIM = 0 and get stuck for 256 cycles until the rollover counter > finally times out. (I've had this happen for certain values of TIM64T > when > my INTTIM loop included a STA WSYNC.) Thanks, thats understandable. Is there a reason like this why someone would use $0288 for SWCHA? Take care, Dennis
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