Hi,

Ryan Miller wrote:
-snip
>occasionally lose it. I'm trying to understand why the read
>doesn't work sometimes (very rarely). In your other message
>you mention not to trust PCLATH. Can it change somehow after
>I load the high address byte in? Interrupts are disabled
>during this portion of the program.

Yes, was abit stressed out last night, first I missed Your
statement about irq disabled, then I also missed the portion
where you set-up PCLATH. Netherless today I re-read Your message
and still think that PCLATH could be the culprit. Maybe not
directly in this routine, but after the call PCLATH contains
the value of high(ascii_con1). The next call/goto or tablejump could
then
potentionally jump to never-never land. As far as I have learned
( the hard way :) ) messing with PCLATH at one place in Your program
can break havoc on other portions. Therefore to be safe set PCLATH =

to high($) after the call to this routine and see what happens.

Read the thread in August titled 'Paging issues',
also the thread 'PCLATH lowest three bits ? never changes ?' in April,
which was when I had the aha ! experience ;)

( available among others at keyzer list at:
http://www.infosite.com/%7Ejkeyzer/piclist/index.html )


/Tony


Tony K=FCbek, Flintab AB            =

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E-mail: tony.kubek@flintab.com
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