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From: cdl@mplvax.UUCP (Carl Lowenstein)
Newsgroups: net.unix-wizards
Subject: Re: Maximum buffer size for read from magtape?
Message-ID: <143@mplvax.UUCP>
Date: Sat, 6-Oct-84 00:59:51 EDT
Article-I.D.: mplvax.143
Posted: Sat Oct  6 00:59:51 1984
Date-Received: Mon, 1-Oct-84 04:17:08 EDT
References: <2248@ucbvax.ARPA>
Reply-To: cdl@mplvax.UUCP (Carl Lowenstein)
Distribution: net
Organization: Marine Physical Lab of SIO at UCSD
Lines: 8
Summary: 

Since the TM-11 controller has been around since forever (early 1970's)
it has a 16-bit byte count register.  The software implication of this
hardware feature is that there is no way to read or write a single record
containing more than 65536 bytes.  This same 16-bit byte count register
is present in all the emulated TM-11 hardware that I am aware of, since
there is no obvious way to extend the original controller architecture.