Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ames!ncar!boulder!sunybcs!rutgers!att!whuts!homxb!hocpa!rusty
From: rusty@hocpa.UUCP (M.W.HADDOCK)
Newsgroups: comp.sys.amiga
Subject: Re: Clarify Perry's AC "PAL Help" article
Summary: Issue V3#4 has correction (page 102)
Keywords: A1000, PAL
Message-ID: <343@hocpa.UUCP>
Date: 7 Jul 88 06:39:20 GMT
References: <1666@vu-vlsi.Villanova.EDU>
Reply-To: rusty@hocpa.UUCP (91341-M.W.HADDOCK)
Distribution: na
Organization: AT&T Consumer Products Laboratories
Lines: 44

In article <1666@vu-vlsi.Villanova.EDU> sword@vu-vlsi.Villanova.EDU (David Talmage) writes:
>In _Amazing Computing_ Volume 3, Number 3, Perry Kivolowitz tells us how
>to improve the grounding of four PALS on the daughter board of our A1000's.
>This change may make the A1000 less prone to mysteriously crashing.

>
>My problem: the text and the illustration don't agree.  The text says to
>connect the top left pins of PALs J&K and L&N.  The picture shows J&K 
>connected per the text but L&N aren't connected by their top left pins.
>Instead, the picture shows L&*K* connected by their top *right* pins.
>
Believe the text.

To quote said magazine, on page 102, (diagram without permission)

            J         K         L         N

        ***********         ***********
        *         *         *         *
        o+----+o  o+----+o  o+----+o  o+----+o
        o|    |o  o|    |o  o|    |o  o|    |o
        o|    |o  o|    |o  o|    |o  o|    |o
        o|    |o  o|    |o  o|    |o  o|    |o
        o|    |o  o|    |o  o|    |o  o|    |o
        o|    |o  o|    |o  o|    |o  o|    |o
        o|    |o  o|    |o  o|    |o  o|    |o
        o|    |o  o|    |o  o|    |o  o|    |o
        o| () |o  o| () |o  o| () |o  o| () |o  <--- these are chip notches
        o+----+o  o+----+o  o+----+o  o+----+o
               *         *         *         *
               ***********         ***********
				   |<- .6" ->|

		 Figure Two: Front of A1000


	"The diagram on page 59 of the "PAL Help" article in AC
	V3.3 was incorrect.  The correct diagram is presented above.
	The article text was correct and following those directions
	would have made the error obvious.  We apologize for any
	inconvience caused by our error."
-- 
Rusty Haddock {uunet!likewise,cbosgd,rutgers!mtune}!hocpa!rusty
AT&T Consumer Products Laboratories - Human Factors Laboratory
Holmdel, New Joyzey 07733   (201) 834-1023  rusty@hocpa.att.com