Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site mplvax.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!sdcsvax!sdcc3!mplvax!cdl 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.