eprom "dumping"

Roy J. Tellason rtellason at verizon.net
Sat Sep 1 15:32:25 CDT 2007

On Wednesday 29 August 2007 03:44, der Mouse wrote:
> > as most of us know, the IBM PC and PC/AT (I think) have extra rom
> > sockets.  If you want to obtain a dump of an eprom, could you simply
> > plug them into these spare sockets and use Debug or whatever to
> > capture an image?  Seems straitforward enough, but I figured it
> > wouldn't hurt to ask...
> Perhaps - if you have such a machine.  (I don't.)
> I cobbled together a breadboard of TTL (mostly latches/counters and
> muxes) which, with suitable software support on the host, lets me read
> ROMs via a parallel port.  It's not especially fast, but it's a good
> deal faster than a serial line....I really need to transfer it from a
> breadboard to something a bit more permanent.  If there's interest I
> can draw up a schematic and parts list....

That would be of interest to me.  Also of interest would be something similar 
that would allow writing to a RAM chip that would appear as read-only to an 
8-bit target system.  I have *lots* of TTL on hand here...   :-)

Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin

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