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PICList Thread
'Supposed "inverting" slave port...'
1996\06\05@170717 by rdmiller

picon face
First, thanks to all who answered my cry for help.
(Isn't the 'net just the best support you've ever gotten?)

It turns out that it was a dumb hardware problem.  Since we
transplanted our test-head from an OS9 (m68k) system and made
the big migration to Windows 95 I've been thinking in LITTLE_ENDIAN
mode for many months...  and so when I went to read byte zero on
my card I was reading the BIG_ENDIAN *upper* byte instead of
data bits 0-7 like I expected.

Dumb.  Dumb.  Dumb...

Anyway, someone clued me in to the errata sheet which detailed
Parallel Slave Port bugs on the PIC I'm using, so I was able to
implement the described work-arounds even before I figured out
my hardware brain-fart.

So when I called vilBoardVersion() from Visual Basic, fully
expecting to have to track down yet another error...  it reported
all sixty-some bytes of the $Header$ string from its viboard.asm

 Me:  "It worked?  Something must be wrong, try it again."

I'll be going home at 4:30 today, for a change.  HUZZAH!

Rick Miller

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