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Service Hints & Tips

Document ID: PSMS-3PWN9X

TP 365 - UMB allocation and PCMCIA under WARP

Applicable to: World-Wide

Following is the Upper Memory Map for systems with BIOS dated before 2/2/96:

A000 - AFFF EGA/VGA Graphics
B000 - B7FF Available UMB
B800 - BFFF CGA/EGA/VGA Text
C000 - C9FF Video BIOS
CA00 - CFFF Available UMB - Can NOT be used for PCMCIA
D000 - DFFF Available UMB - Can be used for PCMCIA
E000 - E5FF System Setup
E600 - E9FF Available UMB - Can NOT be used for PCMCIA
EA00 - EFFF Power Management
F000 - FFFF System BIOS

When using OS/2 Warp 3.0 with this level of BIOS you must have the following statement in the CONFIG.SYS file for proper PCMCIA operation:

BASEDEV=RESERVE.SYS /MEM:CA00,6000

Following is the Upper Memory Map for systems with BIOS dated on or after 2/2/96:

A000 - AFFF EGA/VGA Graphics
B000 - B7FF Available UMB
B800 - BFFF CGA/EGA/VGA Text
C000 - C5FF System Setup
C600 - C7FF Available UMB - Can NOT be used for PCMCIA
C800 - DFFF Available UMB - Can be used for PCMCIA
E000 - E9FF Video BIOS
EA00 - EFFF Power Management
F000 - FFFF System BIOS

When using OS/2 Warp 3.0 with this level of BIOS you must have the following statement in the CONFIG.SYS file for proper PCMCIA operation:

BASEDEV=RESERVE.SYS /MEM:C600,2000


The Upper memory map can change with new levels of BIOS

Search Keywords

UMB, PCMCIA, OS/2, Warp, Memory, BIOS

Hint Category

OS/2

Date Created

19-12-97

Last Updated

01-04-98

Revision Date

13-03-99

Brand

IBM ThinkPad

Product Family

ThinkPad 365C/CS, ThinkPad 365CD/CSD, ThinkPad 365E/ED

Machine Type

2625

Model

Various

TypeModel

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