IBM 09N4076 Usually, Relative, Value Increases, Drive, Valid, Set This Parameter, With Device

CD-ROM can provide data. This parameter

is

usually

not required

in most

computers.

n

is

a

relative

timing

parameter

that

depends

on

processor

speed.

When

the

value

of

n

increases, the

drive

data-transfer

rate

decreases.

Valid

values

for n

are

0

through

99.

The

default

for

n

is

0,

and

the

/T

parameter

is

not required.

/I:n

This

parameter

enables

interrupt

sharing.

If

n =1,

interrupt

sharing

is

enabled.

If

n =0,

interrupt

sharing

is

disabled.

The

default

value

is 0 .

Set

this

parameter

to

enabled

when

the

IDE interrupt must be shared

with

another

device.

Using

Microsoft

CD-ROM

Extensions

Microsoft

CD-ROM

Extensions

(MSCDEX.EXE)

is

an

executable

program

that

works

in conjunction

with

the

device

driver

(IBMIDECD.SYS)

to

enable

your

computer to

read

CDs

as

DOS-formatted

disks.

MSCDEX

is

designed

for

DOS

and

Windows.

The CDSETUP program automatically adds an

MSCDEX

statement

to

your

AUTOEXEC.BAT

file. You

can

modify

the

default

MSCDEX

parameters

to

customize

your

installation.

This

section

explains

the

function

of

each

parameter.

A

text

editor

can

be

used

to

modify

the

MSCDEX

statement

in

your

AUTOEXEC.BAT

file.

The following is the syntax of the MSCDEX.EXE entry in AUTOEXEC.BAT where

[drive:][path]MSCDEX.EXEspecifies the location (drive and directory) of the MSCDEX.EXE file.

[drive:] [path]MSCDEX.EXE /D:device name

[/M:n] [/E] [/V] [/L:drive letter] [/K][/S]

(Do	not	truncate	the actual device driver entry. Place the complete entry on one line
in	the	AUTOEXEC.BAT	file.)

Use the following options to configure the device driver.

/D:device name

This

parameter

specifies

the

name

of

the

CD-ROM

drive

(eight

characters

maximum).

This

name

must be

identical

to

the

device

name

specified

in

the

device

driver

in the CONFIG.SYS file. For example:

C:\MSCDEX.EXE /D:IBMCD1ðð

You

might

support

multiple

CD-ROM

drives

(of

different

types)

by

installing

each

of

their

device

drivers

(naming

them

different

names)

and

placing

a

/D:device name

in

the

MSCDEX

line

for

each

drive.

For

example,

if

you

wanted

to

support

an

IBM

IDE

CD-ROM

drive

and

an

IBM SCSI CD-ROM

drive,

your

CONFIG.SYS

file

might have

these

statements:

DEVICE=C:\IBMIDECD.SYS /D:IDE_CD

DEVICE=C:\IBMCDROM.SYS /D:SCSI_CD

and your AUTOEXEC.BAT file could include this statement:

C:\MSCDEX /D:IDE_CD /D:SCSI_CD

Part 2: Appendixes 2-15