W8SDZ@Simtel20.ARPA (09/30/84)
From: Keith Petersen <W8SDZ@Simtel20.ARPA>
The following file is forwarded from the RCPM circuit.
To: All Bug Hunters From: Paul Foote Date: Sept. 17,1984
I have discovered two subtle bugs in SD-xx.COM where -xx is at least
from -78 to -92 (I suspect they've always been there). Both bugs
involve the "magic number" *** 255 ***.
BUG ONE
If you have a file EXACTLY 255 records long AND that file is a member
of a .LBR library, SD $L tells you that file is "0k", rather than 32k
in size. Abel Iwaz found this one in MEX11.LBR in which SD $L told
him MEX.HQP was 0k in size. After some puzzling around I noticed it
was 255 records in length. To confirm my guess I created a library
called SDTEST.LBR containing 3 garbage files, one of which was 255
records long. Bingo ! SD $L said the file (SDTEST.BUG) was 0k.
BUG TWO
When you execute SD on a hard disk containing EXACTLY 255 files, only
the first column of files is displayed -- the other three columns are
blanked out. Also, as you add or subtract files one at a time 0, 1,
2, or 3 files are blanked out in one row of the display in columns 2
through 4.
REMARKS
I am not yet too crafty with assembly language, but I know lots of you
out there are. So I hope I'll see SD-93 or SD-94 on this board soon
-- with these bugs fixed.
Regards, Paul