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1989-01-29
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126 lines
Recent Press release (Jan. 1989) dealing with Remm.sys and AST
memory boards, AST premium 286 computers; includes specific
recommendations concerning Remm.sys and Desqview.
*** REMM.SYS INFORMATION HEADLINE ***
EPG Products (Memory Boards):
-----------------------------
This is a breakdown of AST (EPG) Memory Products which require
certain versions of the REMM.SYS Expanded Memory Manager. This
is not to be confused with AST Premium Computer System's REMM.SYS
drivers. This breakdown does not apply to AST Computer Systems.
Product's Name REMM ASTEMM
----------------------------------
Advantage/2-386 N/A 2.27
Advantage Premium 4.30 N/A
RAMpage/286 4.30 N/A
RAMpage/2 4.30 N/A
RAMpage/2-286 4.30 N/A
SixPakPremium 4.30 N/A
If you are using an application program which requires an older
version of REMM.SYS (your software should state this in it's
documentation), then you should use an older version - rather
than the most recent version.
SPECIAL NOTE: You can determine which products REMM.SYS is
compatible with by its version number. For REMM.SYS versions 4.0
and later, an ODD version is for AST EPG Memory Boards (i.e
RAMpage, Advantage Premium, etc.). An EVEN version is for AST
Premium Computer Systems (i.e. the Premium/286, etc.).
REMM.SYS v4.3 is for AST Memory Boards
REMM.SYS v4.2 is for AST Computer Systems
This REMM.SYS identification strategy does not
apply to REMM.SYS versions prior to 4.0.
If any of these products are installed in an AST Premium computer
system, then you should use the REMM.SYS that was intended for
use in that particular computer.
SYSTEMS (AST Premium Computers):
--------------------------------
The following are versions of REMM.SYS that have been released
specifically for AST Premium Computer Systems. They are not
intended for use with any AST Memory Board (except when the
Memory Board is installed in an AST Premium Computer System).
Released REMM's for the Premium/286 are:
REMM.SYS v4.20 (EMS 4.0 Specification)
REMM.SYS v4.00 (See Notes Below)
REMM.SYS v3.50 (EMS 3.2 Specification)
REMM.SYS v3.00
NOTES: If you are currently using REMM.SYS version 4.00, than you
should consider updating your system to the latest version
(specifically, version 4.20). This way, you can be assured that
you are using the most up-to-date version that AST has available
(REMM.SYS version 4.20 is fully LIM-EMS 4.0 compatible).
AST Premium Workstations use the same REMM.SYS versions that the
Premium/286 does. However, it is designed around LIM EMS v4.0,
and thus will not work with any versions of REMM.SYS prior to
v4.0. So, if you have an AST Premium Workstation, you should be
using the most current version of REMM.SYS that is compatible
with LIM-EMS v4.0 (i.e. REMM.SYS v4.20).
AST Premium/386 computer systems do not use a REMM.SYS device
driver. But rather, it uses a driver called ASTEMM.SYS that
converts 80386 Extended memory (linear) into Emulated EMS 4.0
Expanded memory. Thus, REMM.SYS should not be an issue on a
Premium/386 computer system.
AST FASTboard/386 accelorator boards for the Premium/286 must be
used with REMM.SYS version 4.27. This board can not use the
general Systems or EPG REMM drivers, do to the special nature of
the board.
REMM.SYS 4.X AND DESQVIEW 2.XX
Users of DESQview 2.01 (or above) may experience system lock-up
when using a version of REMM.SYS of 4.10 (or above). The lock-up
occurs when running an interrupt-intensive application such as a
serial communications program.
The reason that this particular combination causes this symptom
lies in the fact that the LIM 4.0 functions are being executed in
software, requiring a large amount of processing time. This
amount of overhead becomes critical when processing time must
also be devoted to servicing the stream of interrupts generated
by a communications program. Any application that must devote a
great deal of time to both expanded memory operations and serial
communications will eventually be unable to keep pace and cease
to function.
It is recommended that those users who operate in this
environment andexperiencing problems, replace the 4.xx version of
the REMM.SYS driver with a 3.xx version. For AST Systems
products, version 3.50 of REMM.SYS is recommended. For AST
board-level expanded memory products version 3.10 of REMM.SYS
will operate in this environment.
Those users with expanded memory hardware which fully supports
the LIM 4.0 Specification, (i.e., AST RAMpage Plus/286 or AST
Premium/286 using Advanced FastRAM), will not experience any of
the difficulties outlined here.
Please note: It advisable to verify that the correct DESQview
configuration and operation procedures are followed. Appendix E
in the DESQview Manual contains detailed information about
running communications programs.