As you are probably aware, ASP tells you which ROM is installed:how do you tell what revision ROM you have?
$77D.40F2 revision A
$77D.45F1 revision B
$77D.45F2 revision C.
This knowledge is of precisely zero use to you as you stand at a recycler's ROM bin, or staring at an eBay sale, wondering how to get around the puzzle that all Beige G3 ROMs are numbered 820-0954 on the card. To be sure, some are marked 'WRAITH' as well as the Apple ©, and some are 820-0954-A and some are 820-0954-01. Don't be cozened into the expectation that if there are -A cards there will also be -B and -C. 'Taint so.
Somewhere (but which where escapes me) is an (incomplete) essay about chip differences as diagnostics of ROM version. Here are a few pages about the general notions in upgrading Beige G3s, and I shall post the somewhere page when I refind it.
http://www.maccetera.com/news/beigeg3.html
http://resale.headgap.com/osxnotes.html
http://www.xlr8yourmac.com/g3-zone/
http://discussions.apple.com/thread.jspa?messageID=4559815
de
Codicil at 1550GMT: Eh! voilà!
http://eshop.macsales.com/Tech/Load_Page.cfm?page=zifrommainpage.html



