2 May
2008
2 May
'08
2:37 a.m.
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