Subject: Re: [stella] Qb: v1.01 TITLE SCREEN! From: "Andrew Davie" <adavie@xxxxxxxxxxxxx> Date: Sat, 3 Mar 2001 00:48:01 +1100 |
> ldy #-3 > .loop: > sta WSYNC > sta VSYNC ; enable/disable vertical synch > iny > bmi .loop > tya ; or: asl > beq .loop ; bmi .loop Thanks for those suggestions. You seem to latch on to the same sections of code that I have been reworking... perhaps because there's not that much code... but anyway, I'd already replaced this section with... ldy #4 ; lda #D1 ; D1 already in A Synch sta WSYNC sta VSYNC ; start vertical synch dey bne Synch sty VSYNC It *appears* to work OK, though it is a bit different to the original code. But at 11 bytes, its 1 byte smaller than your suggestion. I hope it works on the real thing. Cheers A ----- Original Message ----- From: "Thomas Jentzsch" <tjentzsch@xxxxxx> To: <stella@xxxxxxxxxxx> Sent: Friday, March 02, 2001 5:29 AM Subject: Re: [stella] Qb: v1.01 TITLE SCREEN! > I wrote: > > Or you can even try this: > [snip] > > ldy #4 > > .loop: > > sta WSYNC > > sta VSYNC ; enable/disable vertical synch > > dey > > bne .loop > > tya ; or asl > > beq .loop ; bmi .loop > [snip] > > Sorry, that code is wrong, you might have noticed that > already. Here is the (I hope :) correct one: > > ldy #-3 > .loop: > sta WSYNC > sta VSYNC ; enable/disable vertical synch > iny > bmi .loop > tya ; or: asl > beq .loop ; bmi .loop > > Have fun! > Thomas > _______________________________________________________ > Thomas Jentzsch | *** Every bit is sacred ! *** > tjentzsch at web dot de | > > > > - > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > Unsub & more at http://www.biglist.com/lists/stella/ > -- _ _ _| _ _ _| _ * _ _ , (_|| )(_|( (/_\/\/ (_|(_|\/(_(/_ ,~' L_|\ ,-' \ see my Museum of Soviet Calculators at ( \ http://www.taswegian.com/MOSCOW/soviet.html \ __ / L,~' "\__/ @--> v - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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