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1990-10-08
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ID:A2 AST Premium 286 setup
Quarterdeck Technical Note
by Stan Young
First, let me say that this technical note does not eliminate the need
on your part to read Appendix B in the DESQview manual concerning the setup
of DESQview on machines with exPANDed and exTENDed memory. This appendix
explains the fundamentals of setup on such machines, but Appendix B is
recommended (read that required) reading.
This note is designed to point out the differences in setup between an
IBM AT with an AST RAMpage, as documented in Appendix B, and the AST
Premium 286.
The first important difference is that all of the memory supplied on the
FASTRAM cards, including the memory that is normally allocated to
motherboard or base RAM, is EEMS capable. Therefore, IT IS NOT NECESSARY TO
DISABLE ANY BASE MEMORY when using the FASTRAM cards. Normally, out of the
box, these machines come with 1 meg of memory. 640K is base memory and the
rest is configured as expanded memory with the use of the REMM.SYS driver.
So in the default configuration, in the parlance of Appendix B, it is setup
as though you had a 1 meg RAMpage board backfilling to 0K.
The one change that you may want to make to the FASTRAM board switches
would allow using the DESQview QEXT.SYS file so that it might use 64K
of exTENDed memory. Again, read Appendix B concerning the use of extended
memory and the QEXT.SYS file. As mentioned, the machine comes configured
to have 640K of base and 384 of exPANDed memory. Assuming that you only
want enough exTENDed memory to support QEXT.SYS, you would want to set up
your machine to have 640K of base, 128K of exTENDed and the rest expanded
memory. To do this, you must change the switches that are on the FASTRAM
card that set the Linear Memory Size from 640K (the default) to 768K.
These settings are listed on page B-5 of the AST User's Reference and will
not be duplicated here.
Once you have set the switches to 768K, ignore the Setup error that
occurs on reboot, and run the AST SETUP program and configure the machine
so that it shows 640K base, 128K of extended and the rest expanded. Load
the QEXT.SYS and REMM.SYS drivers in your CONFIG.SYS file and you should be
ready to load DESQview using the XDV.COM file (again, read Appendix B
concerning this file.).
Copyright (C) 1990 by Quarterdeck Office Systems
* * * E N D O F F I L E * * *