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From: joels@tektools.UUCP
Newsgroups: net.micro.cbm
Subject: 1541 channels
Message-ID: <71@tektools.UUCP>
Date: Tue, 18-Dec-84 11:24:21 EST
Article-I.D.: tektools.71
Posted: Tue Dec 18 11:24:21 1984
Date-Received: Fri, 21-Dec-84 00:53:21 EST
Distribution: net
Organization: Tektronix, Beaverton OR
Lines: 23

()

   Some things I have learned about 1541 channels by experiment:
Channels 0 and 1 default to PRG type files. Channels 2-14 default to
SEQ type files. All channels 0-14 can be used to access either type
file. Channels 0 & 1 can be forced to sequential by appending ",S,R" or
",S,W" to the file name. Channels 2-14 can be forced to PRG type files
by appending ",P' to the file name. Channels 2-14 will reference
sequiential if either ",S" or ",R" or ",W" or ",S,R" or ",S,W" are
appended. The shorter forms are not allowed on channels 0-1. "U" may be
substituted for "S" above to get USR files.
   The manual states that up to 5 channels may be open at one time, but
2 of these are always reserved for channels 0 and 1. So up to 3 of
channels 2-14 may be open at a time. Channel 15 is independent of this
limit and may only be used for commands and errors. Closing channel 15
also closes all other open channels.

Joel Swank
Software Center Tools Support
50-487
Tektronix
Beaverton OR 97077
(503) 627-4403