Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!ucsfcgl!pixar!unicom!sayah_k
From: sayah_k@unicom.UUCP (KIANUSCH... Yes, Kianusch himself !!!)
Newsgroups: comp.sys.cbm
Subject: Re: autobooting kermit from a 1581
Message-ID: <443@unicom.UUCP>
Date: 27 Mar 89 00:05:08 GMT
References: <802@zehntel.UUCP>
Reply-To: sayah_k@unicom.UUCP (KIANUSCH... Yes, Kianusch himself !!!)
Organization: No Organization... all messed up !!!
Lines: 32

In article <802@zehntel.UUCP> dave@zehntel (Dave Funk) writes:

>                             ... The only thing I haven't quite figured
>out is how to also overwrite the first byte in the sector (seems this is
>reserved for the sector length). ...

The problem might be...

The are several ways of writing a sectory on a disc. One way is (in Basic):

   PRINT#15,"B-W";channel#;drive#;track#;sector#

There is the bug, because the "B-W" Command uses the first byte as a buffer-
pointer, so what is written on the disc are bytes 1 to 255 (byte 0 is left out)!

So what can we do? Hm...
Just use the 'User-Command' instead of the 'B-W'-Command! The syntax is almost
the same:

               PRINT#15,"U2",channel#;drive#,track#;sector#

("U2" instead of "B-W") Everything else stays the same!

							      This should do it!


BTW: The same thing is also true for the "B-R" command. So it's much better
     to use "U1" instead of "B-R" !

I hope this helped. :-)

					Greetings Kianusch