Are you debouncing the switches properly? And are you checking on every frame?
Try extending the switch debounce time. If only I had a working 2600, I could
burn and test roms for you. Or download via Cuttle Cart. It would give you
another real machine test set. Alas, I have no video.
BTW, if I understand right, you're doing something like this...
lda SWCHB
and #%00000001
BNE Reset_Not_Pressed
;; do reset stuff here
Reset_Not_Pressed
lda SWCHB
and #%00000010
BNE Select_Not_Pressed
;; do select stuff here
Select_Not_Pressed
;; do other stuff here
you might not care in this case, but you can save some cycles by doing
lda SWCHB
rora
BCS Reset_Not_Pressed
;; do reset stuff here
Reset_Not_Pressed
rora
BCS Select_Not_Pressed
;; do select stuff here
Select_Not_Pressed
;; do other stuff here
Hmmm...looks like you save 5 bytes too.
Sorry...I'm sure this doesn't help with your problem, but my abilities are
way hurting at this time of night....
-Chris
On 15 Mar 2004 KirkIsrael@xxxxxxxxxxxxx wrote:
>
>
> Dang it, dang it, dang it!!!!!
>
> Al put JoustPong on an EPROM.
>
> He reported two problems:
> A. he started a "normal" game (vs fuji, no wall, just press reset),
> finished it (thinks he won), and then claims select would just
> not return to the title screen.
> B. the select switch was jumpy, getting too many selects per press
>
> Now, on further testing, he found out that the select switch on
> that machine is twitchy, which would explain B. But he still thinks
> A. wasn't a hardware problem....I'm at a loss. It's not a problem I
> ever saw, (or can repeat now) but I know I didn't always test playing
> full games and then going back.
>
> So....I looked at the code (I think the relevant section SHOULD
> be right after the MainLoop label, some fiddley
> lda SWCHB for reset, then lda SWCHB for Select....it seems
> straightforward, but never say never.
>
> So either it was 1. an intermitent hardware fault on an
> already suspect machine 2. a really odd set of circumstances
> that I can't duplicate 3. something different in Eprom land
> and/or 4. a minor problem, since I guess they could always just
> powercycle :-( ...
>
> So could people take a glance, see if there's ANYTHING dogey
> or suspect in that?
>
> there is one misleading comment , but over all,
> the idea is if select wasn't hit (i.e.
> lda SWCHB
> and #%00000010 ;is game select hit? **(misleading?)
> bne SelectWasNotHit ;if jump to the title screen
> it skips the initiations and gets on with the game, other
> wise it initializes a bunch of stuff and then
> jums to TitleStart, the title screen...
>
> Thanks for any advice. Frickin' dodgey select switch....
> I don't know how to debug this if it is a real problem
>
>
>
>
> --
> KirkIsrael@xxxxxxxxxxxxx http://kisrael.com
> "The Wonder Twins had the right idea. I defy you to think of any crisis
> situation that would not be vastly improved by the presence of a gorilla
> with a bucket of water." --Maraud
>
>
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