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Document ID: GSMH-39WFMC

IBM PC730/PC750 - OS/2 DOS session memory limit

Applicable to: World-Wide

Symptom:
Cannot librate additional memory within OS/2 full screen DOS session by setting Video_Mode_Restriction to CGA.

Problem Isolation Aids:
- Problem only affects PC 700 systems that have devices attached to the planar IDE controller.
- PC 700 systems configured for SCSI (containing no IDE devices) do not show the problem.
- Problem occurs for OS/2 2.11 (with or without Fix Pack #95) and OS/2 Warp 3.0.

Fix:
Some memory intensive DOS applications require in excess of 700KB memory. Setting Video_Mode_Restriction to CGA normally raises the executable program size from around 609KB to 707KB. However, there is a problem for PC 700 machines that make use of the planar IDE controller, whereby this does not have any effect - the size of the executable program remains unchanged.

The only solution for this at present is to specify PC 700 systems that have only SCSI devices attached.

Search Keywords

DOS, OS/2, OS/2 Warp, SCSI

Hint Category

OS/2

Date Created

26-09-95

Last Updated

27-04-98

Revision Date

23-04-99

Brand

IBM PC

Product Family

PC 730, PC 750

Machine Type

6875, 6876, 6885, 6886, 6575, 6585

Model

Various

TypeModel

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