From: brad@heeltoe.com (Brad Parker)
Subject: [Unix-jun72] confused about disk clearing
Date: Thu, 01 May 2008 16:37:44 -0400 [thread overview]
Message-ID: <2048.1209674264@mini> (raw)
I'm confused about the disk clearing code in u0.s:
...
/ zero i list
1:
dec r0 / r0=33.,...,1
dec r1
jsr r0,clear / zero block 'r1' on fixed head disk
tst r1
bgt 1b / if blocks 33,...,1 have all been zeroed, done.
...
I had to add the "dec r1" above to get it to work. Otherwise it loops
forever. Since 'clear' takes a block # in r1, I'm not sure it could
work as written...
anyone look at this?
If I add the "dec r1" it does write some sort of structure to the disk. I'm
not sure it's correct, but it wrote a bunch of blocks.
-brad
next reply other threads:[~2008-05-01 20:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-01 20:37 Brad Parker [this message]
2008-05-01 21:23 ` Tim Newsham
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