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Service Hints & Tips

Document ID: GSMH-3DHLLQ

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IBM PC Server/IBM PS/2 - DMA timeout error (TRAP0002)

Applicable to: World-Wide

Symptom:
OS/2 trap 0002 (DMA Timeout) error occurs on a PS/2 system during operation. Other operating systems will produce different DMA timeout failure symptoms, such as "Panic" hangs, NMI errors, etc

Problem Isolation Aids:
The system hardware diagnostics complete without error. The PS/2 has a DMA controlled arbitrable parallel port. (All IML systems have arbitrable serial and parallel ports). The parallel port DMA arbitration level is at a setting other than "disable".

Fix:
If the failure occurs only when a certain adapter is being utilised. The problem may be circumvented by changing the adapter arbitration level to a setting other than "0".
If problems are still encountered, the parallel port DMA arbitration level, should be set to "disabled". These changes are accomplished by using the "Change Configuration" option on the system partition or reference diskette.
This problem is currently under investigation by engineering. Additional information will be communicated via the Retain tip when available.
If problems are still encountered after disabling the parallel port DMA arbitration level, normal problem determination should be performed.

SAS KEYWORDS:
PSY2 PSY2ERR OS2 TRAP0002
D/T8570 D/T9576 OS/2 TIMEOUT
D/T8580 D/T8590 D/T8595 D/T9585
D/T9577 D/T9556 D/T9557 D/T9595
PSY2COMM PRINTER MODEM D/T9590
PSY2PRT TAPE 113

	Search Keywords
	Hint Category	Retain, OS/2
	Date Created	20-08-94
	Last Updated	01-05-98
	Revision Date	27-04-2000
	Brand	IBM PC
	Product Family	PS/2
	Machine Type	9556, 9557, 9576, 9577, 9585, 9595, 8570, 8580, 8590, 8595, 9595
	Model
	TypeModel
	Retain Tip (if applicable)	H121109
	Reverse Doclinks and Admin Purposes