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- From: eginsber@oracle.com (Eric Ginsberg)
- Newsgroups: comp.sys.unisys
- Subject: Re: CTOS <-> DOS disk conversion (yes, you can)
- Message-ID: <1992Nov10.192230.17314@oracle.us.oracle.com>
- Date: 10 Nov 92 19:22:30 GMT
- References: <1992Nov6.231858.1857@opusc.csd.scarolina.edu> <2971@mitisft.Convergent.COM>
- Sender: usenet@oracle.us.oracle.com (Oracle News Poster)
- Organization: Oracle Corp
- Lines: 49
- Nntp-Posting-Host: dvlseq
- X-Disclaimer: This message was written by an unauthenticated user
- at Oracle Corporation. The opinions expressed are those
- of the user and not necessarily those of Oracle.
-
- A friend of mine from my Unisys days who has been a CTOSian from
- day 1 has this to say:
-
- Received: 11-10-92 10:52 Sent: 11-10-92 10:11
- From: B._Weast@network.convergent.com
- To: eginsber@us.oracle.com
-
-
-
- For accessing DOS floppies on Ngen hardware, the CTOS Executive commands
- MSDOS READ and MSDOS WRITE are available on CTOS Standard Software version
- 12.0.0 and higher.
-
- All 9.x, 10.x, and 11.x versions supported MSDOS READ and MSDOS WRITE with
- the separate package known as PC Emulator, if installed. Though PC Emulator
- needed a hardware slice on non-386 systems to run DOS, the MSDOS READ and
- MSDOS WRITE Executive commands do not need the slice to access DOS diskettes,
- as those utilities run on the native CTOS processor, 186, 286, or 386.
-
- Floppy capacity is limited by Ngen hardware present. All "classic" Ngens can
- read/write all single/double sided double density DOS diskettes (360K &
- 640K).
- Only SCSI-based Xbus modules and 286i/386i processors can read/write high
- capacity (1.2M) floppies. SuperGens and the new combination dual-floppy Xbus
- module can also use the 3 " floppy in either density.
-
- Floppy formatting is automatically determined by the utility with a
- read/retry algorithm that attempts single sided, then double sided, then high
- capacity (on capable machines) mounting operations.
-
- The commands (for any version) are executed by one runfile,
- [Sys]<sys>MsReader.run with accompanying MsReaderMsg.bin message file, now
- bundled with Standard Software 12.0.0 and higher. Command case is 00 for
- Read and 01 for Write.
-
- Only one caveat: The file must be coming from, or going to, the ROOT
- directory of the floppy ... no \MUMBLE\FOO\BS though it's possible (and don't
- quote me on this) that the latest version, under Vpc, will support
- subdirectories, maybe.
-
- And, of course, when writing, the CTOS file should conform to the DOS
- limitations of filenaming before the write is attempted.
-
- Contact your Unisys Sales Representative or Value Added Reseller for pricing
- information or orders.
-
-
-
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