> 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 |
>
>
>
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