Subject: [stella] Supercharger Questions From: Robin Harbron <macbeth@xxxxxxxxxxxxxxxxxxx> Date: Wed, 04 Mar 1998 15:53:24 -0500 |
Eric Christensen wrote: >> >> Two games in a month? 15 days per game? :-O > Well, I'm still not done with the games.. It will probably be another > two weeks if I think realisticly about it. Man, you could have made _huge_ bucks back in the late 70's and early 80's if you could churn out games that quickly :) A Supercharger question: I'm still confused as to the use of Supercharger RAM. Here's an example from http://www.primenet.com/~nickb/sctech.txt showing how to write to ram: ldx #$2f cmp $f010,x lda $f77b This apparently does the equivalent of POKE $f77b,$3f Since <$f010+$2f = $3f - but why the extra step? Why not: lda $f03f : lda $f77b or at least: ldx #$3f : cmp $f000,x : lda $f77b or cmp $f03f : lda $f77b or ldx #0 : cmp $f03f,x : lda $f77b ... or how about a sta $f77b instead of the lda $f77b? All my examples seem a little bit more obvious in their intentions than the example from the docs, although they're certainly helpful. Is there a good reason to make the instructions even less comprehensible? Is it necessary? Another question - what's the point in being able to power up/down the Supercharger's ROM? It's not like extra RAM is available if the ROM is powered down... is there some other effect I don't know about - some side effect of having it enabled that would make you want to disable it? -- Robin Harbron <macbeth@xxxxxxxxxxx> http://www.tbaytel.net/macbeth -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/stella.html Don't post pirate BINs to Stellalist. Be a programmer, not a pirate. Write the best game, win framed autographs of famous Atari alumni!!
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