Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!husc6!bbn!rochester!ciaraldi From: ciaraldi@cs.rochester.edu (Mike Ciaraldi) Newsgroups: comp.os.cpm Subject: Re: running DU on a CPM3 system (or MP/M!!) Message-ID: <5022@sol.ARPA> Date: Tue, 8-Dec-87 22:37:11 EST Article-I.D.: sol.5022 Posted: Tue Dec 8 22:37:11 1987 Date-Received: Sun, 13-Dec-87 16:47:36 EST References: <8712071546.AA16014@plutonium.cchem.berkeley.edu> <8712082023.AA08132@newton.arpa> Reply-To: ciaraldi@cs.rochester.edu (Mike Ciaraldi) Organization: U of Rochester, CS Dept, Rochester, NY Lines: 27 In article <8712082023.AA08132@newton.arpa> bridger%rcc@RAND-UNIX.ARPA (Bridger Mitchell) writes: >DU uses direct bios file i/o to access disk sectors. It's an >example of a program that needs repackaging to run under cp/m 3. >To use it, get CPM2RSX (or similarly-named RSX) and use the >CP/M 3 utility to encapsulate a COM file with that RSX. > >That particular RSX converts cp/m 2.2-style direct bios io calls >to cp/m 3 calls via the dos AND provides full physical->logical >sector deblocking. Am I missing something? The newest version of DU I have seen, version 8.9 (from sometime in 1984), is supposed to check whether it is running on CP/M 1.x, 2.x, or 3.x, and adjust accordingly. For example, it uses direct BIOS calls for 1 and 2, but uses BDOS function 50 to do its BIOS calls in 3. Meanwhile, I am in the process of converting DU to run on my MP/M system. Has anyone already done this? BTW, I assume we are talking about the same "DU"--the disk utility which lets you read, write, and modify any sector on the disk. Mike Ciaraldi arpa: ciaraldi@cs.rochester.edu uucp: seismo!rochester!ciaraldi