IBM 09N4076 manual M nn, IBM 4X/8X/32X CD-ReWritable Internal IDE Option Kit

/M: nn

This

parameter

specifies

the

number

of

sector

buffers

for

temporary

storage

of

the

most

recent

CD

data.

For

example,

to

specify

12

sector

buffers

you

would

use:

C:\MSCDEX.EXE /D:IBMCD1ðð /M:12

The

CDSETUP

program

sets

this

value

to

10.

The

default

value

for

MSCDEX

with

no

/M

parameter

is

4.

You can improve CD-ROM

drive

performance

when

you

use

larger

default

values.

However,

each

buffer

uses

about

2

KB

of

memory,

and

too

many

buffer

specifications

might

slow

down

your

computer

or

interfere

with

other

programs

that

have

large

memory-usage requirements.

You

might

be

able

to

specify

a

larger

number

of

buffers

to

enhance

CD-ROM

drive

performance

without adversely affecting programs that

have

large

memory-usage

requirements

if

you

use

expanded memory

(see

the

/E

option

in

this

section)

or

if

you

load

MSCDEX.EXE

into

high

memory

using

instructions

given

in

the

documentation

that

comes

with

your

operating

system

or

with

the

memory

manager.

/E

This

parameter

instructs

the

computer

to

use

expanded

memory,

if

available.

For

example:

C:\MSCDEX.EXE /D:IBMCD1ðð /E

Note

that

you

must

first

load

an

expanded

memory

device

driver

before

using

this

option.

If no expanded-memory

device

driver

is

loaded,

the

following

error

message

displays:

Expanded Memory not present or not usable.

/V

This

parameter

instructs

the

computer

to

display

a

summary

of

RAM

allocation

and

expanded

memory

usage

at

startup

time.

/L: drive letter

This

parameter

specifies

the

drive

letter

to

be

assigned

to

the

first

CD-ROM

drive.

Do

not

assign

a letter

already

used

by

an

existing

drive

or

your

computer

will not

be

able

to

access the CD-ROM drive. For example, you might use:

C:\MSCDEX.EXE /D:IBMCD1ðð /L:F

Normally, the CD-ROM drive

is

assigned

to

the

next

available

drive

letter

after

devices

such

as

diskette

drives

and

hard

disk

drives.

Therefore,

you

use

this

option

only

if

you

wish

to

assign

a

drive

letter

beyond

the

last

letter

previously

allocated

by

DOS.

/K

This

parameter

instructs

MSCDEX.EXE

to

use

Kanji

(Japanese)

file

structures,

if

present,

rather

than

the

default

alphanumeric

file

structures.

2-16 IBM 4X/8X/32X CD-ReWritable Internal IDE Option Kit