Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!iuvax!pur-ee!young From: young@pur-ee.UUCP (Mike Young) Newsgroups: comp.os.cpm Subject: CBIOS & format for Xerox 820-1 w/double dens mod Keywords: CP/M format Xerox double_density Message-ID: <8480@pur-ee.UUCP> Date: 8 Jul 88 20:59:39 GMT Distribution: na Organization: Purdue University Engineering Computer Network Lines: 23 Greetings! I have a Xerox 820-1 I'm trying to upgrade to double density, using the WD 2793 controller (yes, and the Emerald Microware upgrade kit). It runs CP/M 2.2, and does it very nicely. It occurs to me that I will need a format program to handle double density. I could write one, but if someone else has invented this particular wheel, why should I? :-) In addition, the CBIOS will also need to know how to select the proper density, keep track of who's double and who's single at any given moment, etc. (this particular system will have 2 to 4 5 1/4" DSDD drives on it, and I need to do a LOT of single -> double copying) I suspect someone's already addressed this task, and again I don't see the need to dig into the beast if it's already been done, so.... Any comments? -Mike Young young@eg.ecn.purdue.edu ..!pur-ee!young