Date   : Tue, 01 Apr 2003 12:26:40 +0100 (BST)
From   : Thomas Adam <thomas_adam16@...>
Subject: Re: More expert advice

 --- Kate Kneebone <kate.kneebone@...>
wrote: 

> Hi again,

Hello,

** ooh, my first posting to the list **
 
>  Last night I attempted to fit my shiny new 1770
> disc upgrade.  
> Everything appears to be in the right places, S9 was
> duly snipped (even 
> if I did manage to stab myself in the process...),

:-) careful.

> two ICs and two links 
> plugged in, 1770 board plugged in the right way
> round and the DFS rom 
> inserted.  The only problem is it still thinks it's
> tape only; there's 
> no message announcing the DFS.  

This most likely comes down to two things:

1) The ROM controller for 1770 board is somehow
damaged.

2) Maybe the 1770 DFS chip is damaged and/or not
inserted correctly?

> Before I conclude my
> DFS EPROM has 
> amnesia (moving it to another socket didn't help),
> is there anything in 
> the upgrade I might have missed or done wrong that
> would prevent the DFS 
> starting up? 

When you start it up (on my M128) you get:

Acorn MOS
1770 DFS
BASIC

>_

If you could somehow send a picture of the board
you're inserting, I might be able to have a look at it
to see if there are any obvious flaws???

Hmmm, this sort of problem is difficult to diagnose
without seeing your Beeb. 

Sorry I cannot be of much help :(

-- Thomas Adam

====
Thomas Adam

"The Linux Weekend Mechanic" -- www.linuxgazette.com

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