[vcf-midatlantic] What's wrong with my program experiment?

Dan Roganti ragooman at gmail.com
Thu Apr 6 06:37:19 EDT 2017

On Wed, Apr 5, 2017 at 11:00 PM, Evan Koblentz via vcf-midatlantic <
vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:

> Mike Willegal suggested putting a delay in line 30 between checking each
>> paddle. That fixed it!
> PS. Why does it work? Mike, Dan R., etc. say paddle cross-talk is the
> reason why a delay is needed. See the paddle section at
> http://www.easy68k.com/paulrsm/6502/AAL/AAL8209.TXT. Further discussion
> in the Apple II Enthusiasts group on Facebook...

​some other guy mentioned cross-talk, that's why I posted that link to the
1982 issue which explains how that operates. ​It also mentions a work
around in Assembly code, since adding more delay defeats the purpose of
using assembly code. But I'm not sure yet if there's a work around for
Basic code, maybe there is, perhaps using the same Kernal Rom Calls. But
then your game isn't really time critical as in an assembly program. So you
most likely won't suffer any lag.

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