Reading more than 133 bytes

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Article #104

#104

From: Michael Hanrahan
Date: Mon, 31 Jul 1989 21:03

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Hi,
   How does one read more than 133 bytes into an assembler program?
I've written a program which is intended to read a file which has
been chopped up into small "packets" (sorta like Kermit) but if
I send it a packet with more than 135 bytes in it, things get truncated.

Here's the assembler code which does the read...

            WRTERM 'SEND PACKET>'                  prompt for next packet
            WAITT                                  make sure I/O is done
            RDTERM PACKET,EDIT=PHYS,LENGTH=1024    read the packet

PACKET is defined as

   PACKET   DS  CL1024                          packet buffer of 1k

Obviously, the reason I want to use a packet size larger than 133 is
to reduce the number of system interactions and speed up the file
transfer.  I know that typical CMS programs (written in Rexx, C, or
whatever), can't read more than 133 bytes from the console but there
is obviously some low level way around this because programs like
Kermit can send a packet with more than 1024 bytes each.

Does anyone have any ideas?  Thanks in advance...


Michael Hanrahan
Educational Computing Services
Washington University

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!tut.cis.ohio-state.edu!ucbvax!RICE.EDU!C09615MH%WUVMD
From: C09615MH%WUVMD@RICE.EDU (Michael Hanrahan)
Newsgroups: comp.lang.asm370
Subject: Reading more than 133 bytes
Message-ID: <8907312321.AA24646@rice.edu>
Date: 31 Jul 89 21:03:46 GMT
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