Date   : Sun, 28 Sep 2003 21:11:21 +0100
From   : Andrew Hancock <Andrew.Hancock@...>
Subject: Re: BBC Micro lazy delayed boot! - Interesting develo

 



> I find this confusing.  Is all of the above what you get with DFS 0.90?

YES with SFS 0.90.


> I always through the DFS checked for the prescence of 8271 before
mapping DFS service rom in memory.

> It does.

So why on this Beeb does it display Acorn DFS without the 8271!


> Installing both is a really daft thing to do :-)   

Clutching at straws!

> What's the revision of this board?  Early ones (Issue 1,2,3) needed a
> small mod to IC27 and S9 to make the NMI work correctly.  The mod *must
> not* be made to issue 4 or 7 boards.  Is the Econet NMI link (S2)
> fitted (it should be)?  IC27 (a 7438, not a 74LS38) is OK?  Are there
> any mods to the board?  Are all the socketed chips OK (it's common to
> get a pin bent underneath)?

Issue 4

S2 is fitted.

IC27 is okay and is a 7438

No MODS to the board.

All Socketed chips have been checked.