59 lines
2.3 KiB
Plaintext
59 lines
2.3 KiB
Plaintext
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STAC ELECTRONICS
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TECHNICAL SUPPORT BULLETIN
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NUMBER: 006
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SUBJECT: LOADHI
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DATE: July 9, 1991
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TIME: 12:47 PM
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SOURCE: Tech Support, Engineering, User's Manual
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SUPERCEDES/
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SUPERCEDED BY:
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RELEASE STATUS: Public
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TITLE:
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Loading STACKER into high memory.
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OVERVIEW:
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To conserve base memory, it is possible to load the STACKER driver into
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high memory (between 640K and 1024K) on systems with 80286 chips and
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higher. Appropriate memory management software (QRAM, MOVE'EM, QEMM386,
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386MAX) and hardware are needed. Loading high on an 80286 machine
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requires hardware support for Expanded Memory Specification (EMS) 4.0
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(see User's Manual, "Loading STACKER into High Memory").
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Note: For loading high using MS-DOS 5.0's DEVICEHIGH, see TECH015.DOC,
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"Loading STACKER into upper memory with MS-DOS 5.0".
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ISSUES/COMMENTS:
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Potential problems with loading high are:
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-crowding in high memory, resulting in disk-read errors;
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-erratic behavior of memory-intensive programs;
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-exclude-phrases omitted from the memory manager device line (STACKER
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coprocessor version only);
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-load-high driver not invoked in STACKER.COM device driver line;
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-STACKER cache (/M=xx) specified at excessive size;
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-insufficiently large block of contiguous memory between 640K and 1024K.
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RECOMMENDED ACTIONS:
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1) Consult documentation for memory manager to verify syntax in
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CONFIG.SYS. (User's Manual, page 33, shows examples of modification to
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STACKER line only.)
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2) If applicable, edit load-high driver line to exclude range used by
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coprocessor card (see User's Manual, "Re-enabling Memory Managers").
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Note that the correct syntax for the AT&T 6300's AEMM.SYS is /X=addr-
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addr.
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3) Verify syntax of load-high statement in STACKER.COM device driver line
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(see User's Manual, "Loading STACKER into High Memory").
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4) Reduce size of STACKER disk cache (/M=xx switch in STACKER.COM device
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driver line).
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5) To verify load-high status, use a memory-mapping utility such as
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Quarterdeck's MANIFEST. If Interrupts 25 and 26 are at a segment value
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above A000, then STACKER is loaded high.
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