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- Xref: sparky comp.os.os2.misc:29597 comp.periphs.scsi:4402
- Path: sparky!uunet!portal!cup.portal.com!ts
- From: ts@cup.portal.com (Tim W Smith)
- Newsgroups: comp.os.os2.misc,comp.periphs.scsi
- Subject: Re: CDROM drives and OS2ASPI.DMD
- Message-ID: <65517@cup.portal.com>
- Date: Tue, 8 Sep 92 20:54:04 PDT
- Organization: The Portal System (TM)
- References: <1992Sep4.132342.3214@ryn.mro4.dec.com>
- Lines: 25
-
- > I've tried a few combinations of switches on AHA154X.ADD to prevent the
- > ASPI driver from allocating the CDROM per the instructions in the aspibeta.zoo
- > kit (OS2_20.TXT):
- >
- > BASEDEV=AHA154X.ADD /A:0 /!DM:3 /SM:3
- > and
- > BASEDEV=AHA154X.ADD /A:0 /!DM:3
- >
- > This technique seems a little strange to me since it's not clear how the /!
- > switches communicate to the a specific driver so it's possible I have this
- > part wrong.
-
- Is there any evidence that these switches actually do anything? I work for
- a company that writes SCSI software, and I put a breakpoint at our ADD's
- entry point and poked around with the OS/2 debugger. OS/2 does *NOT*
- appear to actually pass in the BASEDEV line to the ADD, even though the
- PDD and ADD specs claim it does. Either I made a dumb mistake, or this
- part of BASDEV handing is not yet present, which would explain why these
- switches didn't help you!
-
- (As to how these switches communicate with other drivers, that is via
- flags in the device table built by the ADD and examined by DMDs. There
- are flags in that table that the DM and SM arguments control.)
-
- --Tim Smith
-