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EQRAMDVR.DOC
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1987-02-17
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3KB
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111 lines
Why and How to Use EQRAMDVR.SYS
Many RAM disk programs supplied with expansion boards do not
work with an Equity I with dual floppy disks. The Equity I
supports only two floppy disk drives, and these programs
expect the operating system to treat it as a floppy disk.
RAM disk utilities that are in device driver form (must be
specified in CONFIG.SYS) should have no problems. Any RAM disk
utility that is executed from the system prompt will have problems
on a dual floppy Equity. These are the programs EQRAMDVR.SYS
was designed to support.
The device driver EQRAMDVR.SYS provides the support needed for
these utilities by creating an 'empty' disk drive that a RAM disk
program can use when it is executed.
How to Use EQRAMDVR.SYS
Since EQRAMDVR.SYS is a device driver, it must be specified in
the CONFIG.SYS file on your boot disk. See pages 3-1 to 3-4 in
"MS-DOS for the Equity I" for a description of the CONFIG.SYS
file. The boot disk can either be a floppy disk or a hard disk.
The file EQRAMDVR.SYS must also be copied to your boot disk.
In the following instructions, [ENTER] means press the ENTER key,
and [F6] means press the F6 key.
1. Boot your system with your working copy of MS-DOS.
If you have a hard disk that is set to autoboot, boot
from the hard disk.
2. When the MS-DOS prompt appears, place the disk with
EQRAMDVR.SYS in drive B: (A: for hard disk systems). For
a floppy disk system, type:
COPY B:EQRAMDVR.SYS [ENTER]
For a hard disk system, type:
COPY A:EQRAMDVR.SYS [ENTER]
3. Check if CONFIG.SYS already exists on your boot disk by
typing:
DIR CONFIG.SYS [ENTER]
If the message 'File not found' appears, follow step 4a,
otherwise follow 4b.
4a. Type:
COPY CON: CONFIG.SYS [ENTER]
DEVICE=EQRAMDVR.SYS /2 [ENTER]
[F6] [ENTER]
4b. Type:
COPY CONFIG.SYS + CON: CONFIG.SYS [ENTER]
DEVICE=EQRAMDVR.SYS /2 [ENTER]
[F6] [ENTER]
Note: The /2 above is optional. It will be explained in the
following section.
5. Reset the system, and your Equity I is now ready to use
a RAM disk program.
EQRAMDVR.SYS Options and Operation
There is one option for EQRAMDVR.SYS. Typing a /n (where n is a
number from 1 to 4) after DEVICE=EQRAMDVR.SYS sets the number of
RAM disks that can be supported. In the instructions above, the
/2 will allow the Equity I to support two RAM disks. If the /n
option is omitted, EQRAMDVR.SYS sets up support for one RAM disk.
When the system boots, EQRAMDVR.SYS will display a sign on
mesage similar to this:
RAM disk emulator support installed at drive(s) C:, D:
There will from one to four drive letters shown, depending on the
/n option. When you execute your RAM disk program, be sure to
use the drive letter shown in the sign on message. For example,
using Tecmar's MEMDISK program, you would type this command at
the MS-DOS prompt:
MEMDISK D: -BUF160
This would set up a 160K RAM disk at drive D:.
If you attempt to use one of the EQRAMDVR.SYS drives before
running your RAM disk program, you will get one of the following
error messages:
Not ready error reading drive x
Abort, Retry, Ignore?
or
Bad command error reading drive x
Abort, Retry, Ignore?
The x would actually be the letter of the drive you tried to
access. Press A to abort, then run your RAM disk program.
?
The x would actually be the letter of the drive you tried to
acc