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AN-007

September 2000

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Document:	AN-007
Order Number:	AN-007
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Original Filename:	AN-007.pdf

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CHARON-VAX application note
AN-007 Use MGPCX to access DOS floppies in CHARON-VAX
Author: Hunter Goatley

Date:

10-SEP-2000

CHARON-VAX now supports direct access to the CD-ROM and floppy drives on the host
PC. ODS-2 formatted disks (VMS disks) can be accessed directly from VMS running on
CHARON-VAX.
With the aid of a third-party freeware application, MGPCX, you can also access DOSformatted floppies from within CHARON-VAX. This ability provides you with another
method for transferring files between your host Windows environment and VMS running on
CHARON-VAX. The first method is to use Kermit or another protocol to transfer the file
over the “serial” lines in CHARON-VAX. Using MGPCX to give you access to DOS
floppies, you can now transfer files between VMS and your host Windows environment
simply by copying files to and from the floppy.
To transfer from Windows to VMS, simply format the floppy for DOS and copy the desired
files to the floppy via Windows Explorer or whatever method you prefer. Under VMS, you
simply define a logical, PCX_DISK, that points to the floppy drive (say, DKA2:):
$ DEFINE PCX_DISK DKA2:
$ PCX :== $dev:[dir]MGPCX.EXE
$ PCX
PCX> export/binary file.typ
The commands above define a PCX foreign command and use the EXPORT command to
export the file FILE.TYP to the local VMS disk.
To copy a file from VMS to Windows, simply use the PCX IMPORT command to copy the
file(s) from the VMS disk to the floppy. After exiting CHARON-VAX, Windows can then
access the file(s) on the floppy.
Unfortunately, the floppy drive cannot be accessed from Windows while CHARON-VAX is
running. However, even with this limitation, using MGPCX can make it easier to transfer
files back and forth between VMS and Windows.
You can find MGPCX on the VMS Freeware CDs, or using one of the following URLs:
ftp://ftp.wku.edu/vms/fileserv/mgpcx.zip
ftp://ftp.process.com/wku/vms/fileserv/mgpcx.zip
ftp://ftp.tmk.com/ftp-wku-edu/vms/fileserv/
http://www2.wku.edu/www/fileserv/
http://www.tmk.com/ftp/

©2000 Software Resources International. This document is provided for information only and is not a legally binding offer.
Software Resources International reserves the right to change the product specifications without prior notice or retire the
product. The CHARON name and its logo are a registered trademark of Software Resources International. For further
information: www.charon-vax.com, Email: vaxinfo@vaxemulator.com