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From: gpw@ihdev.UUCP (G. P. Wilkin)
Newsgroups: net.micro.att
Subject: Re: PC6300 Memory Expansion
Message-ID: <893@ihdev.UUCP>
Date: Mon, 15-Sep-86 14:26:48 EDT
Article-I.D.: ihdev.893
Posted: Mon Sep 15 14:26:48 1986
Date-Received: Tue, 16-Sep-86 21:30:05 EDT
References: <760001@hpisla.HP.COM>
Organization: AT&T Bell Labs, Naperville, IL
Lines: 61

> PC 6300 Memory Expansion
> 
> Once upon a time, somebody posted instructions for adding memory
> to the AT&T PC6300 ("640K on the motherboard").  I don't seem to
> have these instructions around any more.  It was fairly simple,
> just plug in 256K chips and (???)...
> 
> SO... if you know how to do this, mail me instructions.  So I don't
> get a huge number of replies, please flip a coin first.  Mail only
> if it comes up "heads" twice in a row.
> 
> (If the coin says "heads" five times in a row, go ahead and post
> your answer).
>                               *!hplabs!hpisla!wolpert    David Wolpert
>   /_  __    HEWLETT                      Instrument Systems Laboratory
>  / / /_/    PACKARD                  P O Box 301 - Loveland, CO  80539
>     /
> ======================================================================
> "Be joyful always; pray continually; give thanks in all circumstances"

One, two, three, four, oops, er five..... :-)

These are the correct settings for 1.43, they were unchanged for my 6300
which has the 256k rams. gpw

USE AT YOUR OWN RISK!!!!!!!!!!!!!!!!!!!!!!!
|-----------------------------------------------------------------------|
| SUBJECT: Motherboard Dip Switch Settings for 1.43 ROM BIOS		|
| PROVIDED BY: AT&T PC-Hotline                              		|
|                                                           		|
|     THE FOLLOWING SWITCH SETTINGS ARE FOR ROM 1.43 ONLY!!		|
|									|
| MOTHERBOARD SWITCH BANK 0 - LOCATION 7T |     1=ON  0=OFF  X=Not Appl	|
|-----------------------------------------------------------------------|
|SW1|SW2|SW3|SW4|SW5|SW6|SW7|SW8| FUNCTION                   		|
|-----------------------------------------------------------------------|
| 0 | 1 | 1 | 1 | X | X | X | X | 128KB RAM on Motherboard   		|
|-----------------------------------------------------------------------|
| 1 | 0 | 1 | 1 | X | X | X | X | 256KB RAM on Motherboard   		|
|-----------------------------------------------------------------------|
| 1 | 1 | 0 | 1 | X | X | X | X | 512KB RAM - 256K on Motherbrd		|
|   |	|   |   |   |   |   |   |             256K on Expansion		|
|-----------------------------------------------------------------------|
| 0 | 1 | 0 | 1 | X | X | X | X | 640KB RAM - 256K on Motherbrd		|
|   |	|   |   |   |   |   |   |             384K on Expansion		|
|-----------------------------------------------------------------------|
| 0 | 1 | 0 | 0 | X | X | X | X | 640KB RAM on MB - 128K Bank 0		|
|   |	|   |   |   |   |   |   |                   512K Bank 1		|
|-----------------------------------------------------------------------|
| 0 | 1 | 1 | 0 | X | X | X | X | 640KB RAM on MB - 512K Bank 0		|
|   |	|   |   |   |   |   |   |                   128K Bank 1		|
|-----------------------------------------------------------------------|
| 1 | 1 | 1 | 0 | X | X | X | X | 512KB RAM on MB - 512K Bank 0		|
|-----------------------------------------------------------------------|
| X | X | X | 1 | X | X | X | X | ONLY 64KB RAM Chips used   		|
|-----------------------------------------------------------------------|
| X | X | X | 0 | X | X | X | X | 256KB RAM Chips used anywhere		|
|-----------------------------------------------------------------------|
-- 
George Wilkin 	AT&T Network Systems, Naperville, IL 
		!ihnp4!ihdev!gpw  IH 4A-157  work 312-979-4317