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From: guy@rlgvax.UUCP
Newsgroups: net.wanted
Subject: Re: PDP-9 Assembler Language info needed
Message-ID: <1955@rlgvax.UUCP>
Date: Tue, 29-May-84 00:35:06 EDT
Article-I.D.: rlgvax.1955
Posted: Tue May 29 00:35:06 1984
Date-Received: Fri, 1-Jun-84 21:49:15 EDT
References: <252@wdl1.UUCP>
Organization: CCI Office Systems Group, Reston, VA
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> Ah, memories of days long past.  The PDP-9 assembler is a close
> cousin of that on the PDP-8.  Books on programming the 8 will
> tell you pretty much what you need to know about the 9.

Except, of course, for the word size, since the 8 had 12-bit words
and the 9 had 18-bit words.  And except for the instruction set, which
was different...

> The assembler on the 9, on the Dectape based OS, was retrofitted
> from the PDP-15.  The manuals were the same.

Well, since the PDP-15 came out as a successor to the PDP-9, either the
PDP-9 didn't have an assembler until the PDP-15 came out or the PDP-15
assembler was made out of the PDP-9 assembler (a little more likely).

(BTW, I was very surprised when I read between the lines of some PDP-9
book and found out that the PDP-9 was microprogrammed...)

	Guy Harris
	{seismo,ihnp4,allegra}!rlgvax!guy