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- ----------------------------------
- Review of the AST SixPak Premium
- ----------------------------------
-
- By Syd Weedon
-
- I got my AST SixPak Premium with a certain degree of dread
- since I had pulled the standard microprocessor in the Compaq and
- installed an NEC V-20 for a cheap speed-up. I figured if anything
- would cause compatibility problems with the V-20, it would be
- something as powerful and esoteric as the AST EEMS system. I also had
- to suppress some guilt in realizing the naked "techno-lust" I was
- experiencing. I mean, what do you really do with TWO MEG OF RAM???
- But, I bought it anyway and now I'm glad I did.
-
- The NEC V-20 has been no problem at all to me. I've used it now
- in a Tandy 1000 and a Compaq Portable. I have read the message
- threads on Compuserve in which the merits of the V-20 were debated,
- and I know that some people have experienced difficulties in certain
- configurations. I haven't. The following scores show that it is
- worth the trouble. Without the expansion board, the 256K Compaq gets
- a 1.9 on the Norton Scale.
-
-
- Test using Norton's System Information Utility on a Compaq Portable
- with a 2 Megabyte AST SixPak Premium Memory Expansion Board
- and an NEC V-20 Microprocessor.
-
- Without Desqview:
-
- SI-System Information, Version 3.10, (C) Copr 1984-86, Peter Norton
-
- Compaq
- Operating under DOS 2.10
- 3 logical disk drives, A: through C:
- DOS reports 640 K-bytes of memory:
- 52 K-bytes used by DOS and resident programs
- 588 K-bytes available for application programs
- A search for active memory finds:
- 640 K-bytes main memory (at hex 0000-A000)
- 32 K-bytes display memory (at hex B800-C000)
- 143 K-bytes extra memory (at hex C040-E400)
-
-
- With Desqview Loaded:
-
- Computing performance index relative to IBM/PC: 1.7
-
- SI-System Information, Version 3.10, (C) Copr 1984-86, Peter Norton
-
- Compaq
- Operating under DOS 2.10
- 20 logical disk drives, A: through T:
- DOS reports 236 K-bytes of memory:
- 111 K-bytes used by DOS and resident programs
- 125 K-bytes available for application programs
- A search for active memory finds:
- 640 K-bytes main memory (at hex 0000-A000)
- 127 K-bytes display memory (at hex A040-C000)
- 143 K-bytes extra memory (at hex C040-E400)
-
- Computing performance index relative to IBM/PC: 1.7
-
- Notice that SI is not able to correctly analyze the Extended
- Expanded Memory System (EEMS) mapping. It only shows 1146K of the
- 2024K which the board can access. The following is a more accurate
- survey of what this system does.
-
- Right now, I have the Compaq Portable with 256K on the
- motherboard set up in the following way:
-
- 1 512K fAST disk RAM disk which emulates a hard drive
- Desqview loaded
- A 31K disk cache
- WordStar Release 4 which requires 320K
- Traveling SideKick which takes about 80K
- A 128K DOS partition
- A 64K print spooler
-
- Using a utility called XMEM which I got from a public bulletin
- board, I get the following analysis of my memory usage:
-
- 1664 K Total Expanded Memory
- 576 K used by process 0
- 80 K used by process 1
- 96 K used by process 2
- 208 K used by process 3
- 704 K free
-
- 384K is missing from the Total Expanded Memory. This is because
- my motherboard has 256K installed, and the first 384K of the SixPak is
- used to bring the conventional memory of the computer up to 640K.
-
- An interesting quirk of the EEMS system is that the less
- conventional memory you have already installed in your computer, the
- better Desqview can utilize the expanded memory. EEMS is managed in
- your "conventional" memory (regular RAM up to the 640K limit), but the
- board can only use the conventional memory it supplies to support the
- expanded memory. What this means is that if you already have 640K of
- memory installed you would be better off to remove some of it before
- installing the EEMS system. Since my computer already had 256K on the
- motherboard, the Six Pack provides 384K of its memory to serve as
- conventional memory, so it has 384K in which to support EEMS. Had I
- only had 128K, the Six Pack would have had 512K in which to support
- EEMS, and could therefore access more of the EEMS. I know that sounds
- confusing and backwards, but that's the way it works. EEMS is a
- different world.
-
- I am quite happy with what I have right now, and I don't think
- I'll be yanking chips out of the motherboard. I just experimented
- again and loaded WordStar Release 4, Professional Filing Assistant,
- Traveling SideKick, and opened a 128K DOS Window. That's in addition
- to the 64K print spooler, 31K disk cache, and a 512K RAM disk, and
- IT'S ALL RUNNING CONCURRENTLY! Amazing, huh?
-
- Since I am multi-tasking them using Desqview, I can switch
- between them instantly and can run one in the background while working
- on another. I can also "window" them so that I can see the work of
- one while in another. Desqview (EEMS version 1.1) supports up the
- nine of these windows. The windows can be shaped and moved easily to
- suit you. Also, you can transfer data effortlessly between the
- programs. Desqview really makes the EEMS system shine. Without it,
- you would be limited to massive RAM disks and print spoolers, or you
- would only be able to make use of the EEMS with programs which can
- access it on their own, like LOTUS 1-2-3 and DBASE III. Fortunately,
- Desqview is provided "free of charge" with the board. Also, the board
- comes with it's own spooler, RAM disk, memory management, and
- installation software, all of which is very good and easy to set up.
- With Desqview you can create a workstation which can do about as much
- work as anyone would ever want to do at one time. I know people who
- run bulletin board systems under Desqview and use their computers for
- other tasks while the board is up and running.
-
- Desqview is remarkably easy to learn and use, considering how
- sophisticated it is. I have glanced at the manual, but really have
- not needed it for much beyond getting the basic terms and method of
- installation. My only frustration with it is that it won't run on my
- Tandy with 640K because the Tandy is not an EEMS machine.
-
- The SixPak Premium itself is no trouble to install, unless,
- like me, you're not terribly technical, and lack the foggiest idea of
- what you're doing. EEMS is so different from conventional RAM that,
- at first, I couldn't tell if I was installing it right or wrong. I
- could run a CHKDSK and see that the Compaq was not recognizing the
- board, but I didn't know why. I know what a DIP switch is and where
- to find them, but unless someone tells me exactly how to set them, I
- remain unsure of myself. The switches on the board I got were not set
- the way the manual said they would come from the factory. I called
- AST and a somewhat impatient but correct technical support guy
- promptly gave me the correct settings. With those in hand, it was
- short work to get the board up and running. I have called AST twice
- now, first to find out if they supported the Compaq Portable, and the
- second time as I just described, and both times they were very
- helpful.
-
- So is the 2 meg SixPak Premium and software worth the $560?
- Consider what you get: Onboard Clock/Calendar, Serial Port, Parallel
- Port, hook-up sockets for optional game ports and serial ports, 2
- Megabytes of RAM, superb supporting software, Desqview, excellent
- technical support from the manufacturer, a two year warranty, the
- ability to multi-task in real time without buying an 286-based
- machine, and the satiation of even the most intense techno-lust. I
- think it's worth it.
- ---------------------------------------------------------------------
- (c)Syd Weedon, 1986
- All Rights Reserved
- Permission to make commercial use of this article can be obtained by
- writing the author at Box 580, Whitesburg, Kentucky, 41858