Date   : Thu, 25 Oct 2007 10:23:25 +0100
From   : julesrichardsonuk@... (Jules Richardson)
Subject: Atoms and video output

Mike Tomlinson wrote:
> In article <4718D97A.3030605@...>, Jules Richardson <julesrichar
> dsonuk@...> writes
> 
>> I've had a few duff 2114s on the other boards, and one system with a duff MOS 
>> ROM, which seems an unusual part to die (it'd invariably power up saying
"CORN 
>> DTOM" and the keyboard repeat would have gone haywire)
> 
> ROM or EPROM?  If EPROM, may have suffered bit rot, especially if the
> window is uncovered.

[list address corrected]

It was a masked part. Quite surprising - I've hardly ever seen those fail. I 
dropped it into another working Atom just to rule out the socket (although the 
fact that it had got as far as trying to copy the startup message to video RAM 
suggested that the address and data lines on the ROM socket were OK).

cheers

Jules