Subject: RE: saving a FLASH chip? (4000/90, 4000/100)
To: 'Chuck McManis' <email@example.com>
From: Carlini, Antonio <Antonio.Carlini@riverstonenet.com>
Date: 12/09/2001 11:12:47
> Chuck McManis wrote (admittedly a few months ago! ...)
>So given that NetBSD screws up the FLASH chip in some machines,
>know of a program that I could run on VMS to copy the contents of
>to a file and then to restore it from that file? I'd like to save
>proms before they are modified :-) Source code would be OK since I
>most of the languages available for VMS in a ConDist somewhere.
Sucking down the contents of Flash should not
be too hard. It lives in 512KB starting at
I've done this before (for a different machine)
using OpenVMS, but I guess that's not really
appropriate here :-)
Writing the flash back should be fairly
easy too - you need to open the box,
determine the exact flash type (probably
some AMD or other), read the data sheet
and blast away. (You might want to find
some unused area of 0xFFFF or 0x0000
towards the end to use for experimentation).
If you get it wrong you need an appropriate
eprom programmer and quite possibly
the ability to successfully desolder
the relevant chip(s)!
I have an upgrade that is known to be
bootable from an ODS-2 formatted disk
(and a corresponding upgrade that
may or may not be MOP bootable).
This upgrade fixed the NetBSD "problem"
for one individual's VAXstation 4000-90.
I'll see if I can persuade someone to
make it available via the OpenVMS
Freeware CD (which is also available on
the web, so you don't need to get the CD!)