From: dba@jet.uk (Dennis B Armstrong)
Newsgroups: comp.sys.atari.st
Subject: Re: Help! TOS 2.06 requires jumpers set...I have resistors.
Date: 23 Nov 92 12:54:52 GMT
Organization: Joint European Torus

In <morrison.722192142@ee.ualberta.ca> morrison@ee.ualberta.ca (Robert Morrison) writes:

>Greetings,

>	I just recieved the TOS 2.06 ROMs I ordered a couple of weeks ago
>from CodeHead.  The package is really slick.  I popped out my old ROMs, put
>in the new ones, and then hit the section about "jumper" settings.  I hunted
>around for about five minutes, looking for the "jumpers" W102, W103, and 
>W104 without finding them.  Then I started looking closer at the system
>board, at the printing, instead of just looking for jumpers.  Aha!  There
>they are...right beside the ROMs...only they aren't jumpers, they're  
>resistors, soldered right into the board....  So, I said, "S#*t."  And that's
>where I'm at still.

>	So, what do I do?  Continue using TOS 1.4?  Desolder the resistors
>from the system board and resolder them in the correct positions?  I am
>hesitant to apply a soldering iron to my system board.  Could I install
>jumpers of my own, or are these resistors critical?  (I can't tell what 
>value they are as they have been painted over.)  This makes me quite angry.

The "resistors" are 0 ohms, as the automatic insertion machines prefer to
handle standard resistors instead of pieces of wire. :-)

>	Oh, yes, I should mention that the "jumpers" are soldered into the
>wrong points for the new ROMs, according to the docs CodeHead sent me, and 
>I tend to believe the docs...my system won't come up when I power it on.

>	Can anyone give me some advice?  What do these jumpers do?  Are they
>involved in addressing the new ROMs?  Help!       


Perhaps it should be in the FAQ list?

		TOS ROMS

ATARI STE (Tos 1.6, 1.62, 2.06)
These have 32 pin I/C holders.

My 1.6 and 2.06 tos versions were both the same type (32 pin type 27C010A)
Here follows the jumper settings for other ROM/EPROM types:
From the STE Computer Field Service Manual (C302481-001 REV A Aug 91)

ROM Jumper settings:

ROM/EPROM Part type     W102         W103        W104
        27256          Don't care    1 and 2     N/C
        27512           2 and 3      2 and 3     N/C
571001/27C1000/531000   2 and 3      2 and 3     2 and 3  (the default setting)
27010/571000/27C1001    1 and 2      2 and 3     1 and 2

The jumpers are located next to the HI eprom

                        W104    W103
                        1-2-3   1-2-3

   ----------------.    W102
                 1 |    1-2-3
                   |
                  -
           HI    |
                  -
                   |
                   |
   ----------------


Hope this helps
Dennis







-- 
_. ._______________________. .___________________________________________
_| |___. .__. ._____. .____| |__  Dennis Armstrong, CODAS division
       | |  | |__.  | |           Joint European Torus 
       | |  | :__|  | |           Abingdon, Oxfordshire, OX14 3EA, UK 
  |~__' :   | `--.  | |           tel ++44 235 464871
  ~----~    +----+  +-+           dba@jet.uk


- Disclaimer: Please note that the above is a personal view and should not 
  be construed as an official comment from the JET project.
Newsgroups: comp.sys.atari.st