I saw something right after the label SendPSTRLoop:.   You have a CALL MSG
line there, but MSG is only defined as a variable.  When I ran your code in
MPLAB, the next instruction to execute is the third line after start, or
0x011 in ROM.  Then, when it gets to the delay routine, I get a stack
overlow.

John

-----Original Message-----
From: Robert Sochon [mailto:goatpics@YAHOO.CO.UK]
Sent: Thursday, April 12, 2001 11:47 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: [pic]: LCD mystery


I have some code for 4 bit data transfer from Myke
predko - its good code - ive got the delays right ( i
think) but every time i turn the circuit on the
display shows a different set of characters everry
time.... nothing logical either just a set of junk!

Any ideas?

its menat to say hello world and occassionally shows
the right number of characters.... but not always!  -
no bust jumpers either


Does anyone have a truly  bullet proff complete 4 bit
routine? that doesnt use the busy flag...!

THanks for all the help already - im slowly gettiong
there - uphil struggle :)

Cheers

robert

ps attached is asm file if anyone wants a look!

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