Adaptec RLL Controller and UMA Address Range (73626)


The information in this article applies to:

  • Microsoft MS-DOS operating system 5.0
  • Microsoft MS-DOS operating system 5.0a
  • Microsoft MS-DOS operating system 6.0
  • Microsoft MS-DOS operating system 6.2
  • Microsoft MS-DOS operating system 6.21
  • Microsoft MS-DOS operating system 6.22
This article was previously published under Q73626

SUMMARY

The Adaptec RLL ACB-2370 and ACB-2372 hard drive controller cards use a 16K address range in the upper memory area (UMA). Both of these cards can be configured for two ranges: either CC00-CFFF or the default range C800-CBFF.

On both cards, the jumper marked J12 is used to set this address range. If the jumper is set to positions 1 and 2, the card is configured for C800-CBFF. If set to positions 2 and 3, the card is set for CC00-CFFF. If the jumper is removed, no address range is used by the controller card.

MORE INFORMATION

To use EMM386.EXE to load device drivers high, use the ADAPTEC.SYS driver, and be sure to exclude the range used by the Adaptec controller. For example, if the card is configured for the default settings, the address range used can be excluded by changing the EMM386 line in the CONFIG.SYS file as follows: 
   device=c:\dos\emm386.exe noems x=C800-CFFF
Modification Type:MajorLast Reviewed:5/12/2003
Keywords:KB73626
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