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STAC ELECTRONICS
TECHNICAL SUPPORT BULLETIN
NUMBER: 005
SUBJECT: STACKER-MISC
DATE: May 24, 1991
TIME: 2:57 PM
SOURCE: Engineering, User's Manual
SUPERCEDES/
SUPERCEDED BY:
RELEASE STATUS: Public
TITLE:
The STACKER device driver's memory requirements.
OVERVIEW:
The STACKER device driver is a resident program. It loads from the
CONFIG.SYS file at boot-time, mounts the compressed STACKER volumes, then
shrinks down and remains in RAM until powered off.
Starting sizes in bytes, without STACKER cache (/M=0)
Coprocessor Software
Version Version
1st volume (with 4KB clusters):21,504 30,720
(with 8KB clusters):25,600 38,912
add'l volumes: 3,072 each 3,072 each
When STACKER loads at boot time, the size of the driver (both initial and
resident) is displayed.
ISSUES/COMMENTS:
1) The amount of memory used by STACKER may prevent the launching of
programs which ran properly before STACKER was installed. "Insufficient
memory" messages may result.
2) When loading both the driver and the STACKER cache into high memory,
there may not be a sufficiently large contiguous block of memory. This
may result in an error message from the memory manager and failure to
load the driver high.
3) In the coprocessor version, 9 Kbytes are allocated for internal
buffers by default.
RECOMMENDED ACTIONS:
1) If the STACKER cache has been specified, try lowering the /M=xx switch
in the "DEVICE=C:\STACKER\STACKER.COM..." line for a smaller cache (see
User's Manual, "STACKER Utilites/Commands"). If errors persist even with
the driver as small as possible, use a memory manager to load the STACKER
driver (and cache, if present) into high memory.
2) Lower the size of the STACKER cache, as in (1), until the driver fits
into high memory. Most memory managers include a utility for optimizing
the organization of device drivers; optimizing high memory may allow the
STACKER driver and cache to fit better.
3) To free up the 9 Kbytes of internal buffers, insert an /M=0 switch to
the STACKER device driver line in CONFIG.SYS, as in (1).