On 11/9/16 6:18 PM, Paul Koning wrote:
On Nov 9, 2016, at 5:57 PM, Josh Dersch <dersc...@gmail.com> wrote:
...
A quick update -- I ran the ZTCD diagnostics and they do fail, despite my
recollection (this is what I get for not taking notes at the end of
yesterday, and yesterday seems so far away now...). The first test (a
forward WALL, followed by an RALL of a single block) fails with the
following spew (for example):
BLKRQ 000310 DATA ERR WORD 00054. S/B 176376 WAS 104106
Based on a reading of the fiche listing (which is a slightly newer revision
of the binary I have) I believe S/B is the expected data and "WAS" is the
read-back data for a given word. Since one appears to be the obverse
complement of the other, it looks like the obverse complement logic is
running when it shouldn't be...
Yes, those two patterns are indeed obverse complement. Word 0054? That's odd,
if it's doing this wrong for a word in the middle of the buffer. Can you have
it halt on fail so you can examine the buffer?
paul
It's actually word 4 (transcription error on my half) and it reports
errors for all words in the block (though the reported word number
doesn't actually correspond in any meaningful way to the word on tape,
per the documentation); i just singled that one out for an example.
They all show the read data being the obverse complement of the expected
data. I'll be doing some serious debugging tomorrow...
- Josh
