EMM386 DMA Buffer and SCSI Devices (69086)
The information in this article applies to:
This article was previously published under Q69086
3.00 3.00a
WINDOWS
SYMPTOMS
If you are using EMM386.EXE in a system equipped with a SCSI host
adapter, you may receive the error:
EMM386:\377DMA buffer is too small. Add D=nn parameter and reboot.
CAUSE
Direct memory access (DMA) is used by SCSI host adapters for data
transfer. EMM386 maintains a buffer for DMA data transfers. This error
indicates that the DMA buffer maintained by EMM386.EXE is not large
enough to handle the size of DMA transfers made by the SCSI device.
RESOLUTION
As the message states, the error can be eliminated by using EMM386 DMA
buffer size parameter D= in the CONFIG.SYS file as follows:
DEVICE=EMM386.EXE D=128
Start at a value of 32 and increase in increments of 16 until the
error no longer appears. The default value is 16, the maximum value
is 256.
| Modification Type: | Minor | Last Reviewed: | 7/7/2005 |
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| Keywords: | KB69086 |
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