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PICList
Thread
'Supposed "inverting" slave port...'
1996\06\05@170717
by
rdmiller
|
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
source file JUST LIKE IT WAS SUPPOSED TO!
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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