Newsgroups: comp.sys.atari.st
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!comp.vuw.ac.nz!actrix!Roger.Sheppard
From: Roger.Sheppard@actrix.gen.nz (Roger Sheppard)
Subject: Re: RAM upgrade
Message-ID: <1991Jun13.021640.6903@actrix.gen.nz>
Organization: Actrix Networks
References: <1991Jun12.124509.19294@uniwa.uwa.oz>
Date: Thu, 13 Jun 1991 02:16:40 GMT

In article <1991Jun12.124509.19294@uniwa.uwa.oz> ermadmin@uniwa.uwa.oz (Earth Resources Mapping) writes:
> I have just started to build the 2meg upgrade board as posted
> to the net and it looks great..
> 
> However, could some clever person explain how the pins on the
> MMU are numbered so that I dont solder the extra address line
> to the wrong place
> ..Clive

On the top side of the IC there is a bevel on it with a dimple,
This dimple is over pin 1, and the pin to the left side of the Dimple is 68,
and the left most pin on that side is 61,
 Note pin 61 is connected to 0 volts.
                                       * <- Dimple
               61,62,63,64,65,66,67,68,1,2,3,4,5,6,7,8,9
               ^        ^
               0V      A9
 
I hope this helps.

-- 
***  Roger W. Sheppard        *    Roger.Sheppard@bbs.actrix.gen.nz  ***
***  85 Donovan Rd          *  *   At least I don't Flicker, not     ***
***  Kapiti New Zealand..    *     like a dying light globe. !       ***
