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AN-005

September 2000

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Document:	Using VAX CD’s and floppy disks on OpenVMS/Alpha hosts
Order Number:	AN-005
Revision:	0
Pages:	1
Original Filename:	AN-005.pdf

OCR Text

CHARON-VAX application note
AN-005 Using VAX CD’s and floppy disks on OpenVMS/Alpha hosts
Author:

Software Resources International

Date:

15-Sep-2000

The CHARON-VAX emulator for OpenVMS/Alpha executes binary VAX instructions on an
OpenVMS/Alpha host system. By emulating a complete VAX hardware system including its disks and
other peripherals, CHARON-VAX can execute existing unmodified VAX software, including older
versions of VAX/VMS and its applications, on OpenVMS.
Not all implementations of CHARON-VAX support the direct connection of physical host devices like
CD or floppy disk drives to the emulator. In general, it is more convenient (and faster) to create a
CHARON-VAX disk image of a CD or floppy drive and use that with the emulator.
MKIMAGE/Alpha is the utility to make such a disk image from a physical device. The utility does
not require any parameters from the command line. After starting it prompts for two arguments: The
name of a physical device to copy from and a name of the image file to copy to.
MKIMAGE/Alpha is designed for OpenVMS/Alpha version 7.1. and 7.2. To use MKIMAGE, mount
the device to be copied as “foreign” and run MKIMAGE_A.EXE as it’s shown in example below.
Example with a VMS formatted CD:
Assuming that the CD drive in the OpenVMS/Alpha system is called DKA100: we can use the
following sequence:
$ RUN MKIMAGE_A.EXE
Enter the name of the device to make the image from: DKA100:
Enter the name of the output file: DKA200:[000000]MY_CD.DSK
1331208 blocks copied
$
Example with a VMS formatted floppy disk:
Assuming that the floppy disk drive in the OpenVMS/Alpha system is called DVA0: we can use the
following sequence:
$ RUN MKIMAGE_A.EXE
Enter the name of the device to make the image from: DVA0:
Enter the name of the output file: DKA200:[000000]MY_FLOPPY.DSK
2880 blocks copied
$
Once the image has been generated, it is associated in the CHARON-VAX configuration file with a
specific system, for example:
load RQDX3 UDA
set UDA file[0]=”VAXSYS.DSK”
set UDA file[1]=” DKA200:[000000]MY_CD.DSK”
set UDA file[2]=” DKA200:[000000]MY_FLOPPY.DSK”
The MKIMAGE_A.EXE file is available as a ZIP file on the download page of WWW.CHARONVAX.COM. Unzip it on your OpenVMS/Alpha system.
[30-18-005]

©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