[Unix-jun72] confused about disk clearing
brad at heeltoe.com
Thu May 1 16:37:44 EDT 2008
I'm confused about the disk clearing code in u0.s:
/ zero i list
dec r0 / r0=33.,...,1
jsr r0,clear / zero block 'r1' on fixed head disk
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.
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