AHS@PSUVM.BITNET (07/24/87)
>>From: hundt@wind.bellcore.com (tom hundt) >>Well this sounds almost too good to be true! >>Will someone please re-post the directions? I guess I missed 'em >>the first time 'round. Here they are: 1987 May 26 00 01 02 03 04 I made a mistake in my previous note. Expanded memory is limited to 8 Megabytes if you use EMS expansion cards such as Intel or AST. However, Desqview, using the 386 built-in memory management services, will create an upto 16-Megabyte virtual EMS for *each* virtual *concurrent* 8086 machine awaken from the 386 by Desqview. Further, each of these virtual EMS memories is 32-bit memory since the 386 build them from the CPU own's 32-bit memory. I append a corrected version and a last minute news supplement. 00 01 02 03 This week's news: How to turn your PC into a true multitasking 80386 machine for 500$: (Neither tools nor soldering needed except for a chip extractor). 1.. Insert in an empty slot an Everex "286 board for PCs". That will give you an 8-Mhz no-waitstate 80286 with 640k of dedicated 16-bit memory. Cost: 400$ list, 275$ by mail. By now, you are already outperforming the newest IBM 8-Mhz 1-waitstate AT. 2.. Remove the 80286 chip from the board you just installed and trade it for a 80386. Or get a free sample from Intel. 3.. Insert into the now empty 80286 socket a Cheetah "adapter 386" microcard (3.5x3.5-in). Place into the empty 386 socket on the Cheetah your new 80386 chip. And that is it. Now, your DesqView 1.3 or 2.0 will run the 80386's built-in mode called "virtual 8086". DesqView will generate up to 256 totally independent and multitasking virtual 8086/8088 PC-DOS sessions. Further, each separate session can use its own dedicated 16 Megabytes of Enhanced (EEMS) or regular Expanded Memory (EMS). Naturally, each session has it own fully adjustable window. This means that you are now able to load into the RAM memory of your five year old PC up to 256x(0.64+16)= 4,260 Megabytes of data and programs. Help is on the way, Idea Associates has just started selling a single 1-slot card with 16 Megabytes of RAM on it (16 tiny columns of 1-megabyte sticks which collectively occupy less than half a full card). Thus, you will only need slightly less than 300 of these cards to exhaust the memory capacity of your rejuvenated PC. Fortunately, further help is on the way. You can now buy "Above Disk" sofware to create virtual EMS or EEMS by using your hard disk. Thus, at most, you will only need a 4,260 megabytes hard disk to exhaust the new capability of your old PC. Of course, when you order your hard disk, it would be prudent to add a few megabytes to hold what you already have on your present hard disk. By-mail cost: Everex "286 board for PCs" 275 275 80386 0 to 200 Cheetah "adapter 386" 140 140 DesqView 1.3 or 2.0 45 to 65 ----- ----- 460 680 Trade-in allowance for 80286 60 to 10 ----- ----- FINAL COST 400 to 670 Should we investigate a mass purchase by the club ???. Michel PS: Upon reflection, it seems that the major problem with this scheme is finding an empty slot on a 5-year old PC. References: Everex Excelerator 286 board for PCs: PC Magazine, 1987 Feb 24, p.45. Color picture of it: InfoWorld, Feb 2, p.35. Cheetah "Adapter 386": Preview, PC Magazine, 1987 Feb 24, p.35. IdeAssociates 16-MBy board color picture ad: ibid, p.307. TeleWare "Above Disk" ad: ibid, p.346. and: PC Magazine, 1987 Feb 10, p.340. ---------------------------------------------------------------------- Last minute news: In case you find you real 386 already to slow, help is already on the way. Intel will announce February 16th: a 20-MHz 386 a 16-MHz 387 math coprocessor a 20-MHz 387 math coprocessor a 386 specific DMA controller a 386 specific cache controller That should do until next year when we will need a few more megaHertz and a 5-millisec hard disk just to keep up. Michel <Fin><End> =============================================================================
tankus@hsi.UUCP (Ed Tankus) (07/28/87)
Why bother with all the adaptors, etc.? Applied Reasoning somewhere in Mass
makes a 386 add-in board for the PC bus that occupies one slot. Cost is about
$2,000. I think I would opt for this method rather than the "erector set"
scheme.
Cheers!
-- Ed.
Net : {noao!ihnp4!yale!}!hsi!tankus
Snail: Health Systems Int'l, 100 Broadway, New Haven, CT 06511
Bell : (203) 562-2101cbenda@unccvax.UUCP (carl m benda) (07/29/87)
In article <17248AHS@PSUVM>, AHS@PSUVM.BITNET writes: > > I made a mistake in my previous note. Expanded memory is limited to > 8 Megabytes if you use EMS expansion cards such as Intel or AST. > However, Desqview, using the 386 built-in memory management > services, will create an upto 16-Megabyte virtual EMS for *each* virtual > *concurrent* 8086 machine awaken from the 386 by Desqview. Further, each > of these virtual EMS memories is 32-bit memory since the 386 build them > from the CPU own's 32-bit memory. You've made more than one mistake... the EMS expansion cards you are talking about work off of a 16bit data path IF they use the AT bus, and only an 8 bit data path if they work on a pc what this means is that the EMS memory is only 16 bit or 8 bit respectively. > 1.. Insert in an empty slot an Everex "286 board for PCs". That will > give you an 8-Mhz no-waitstate 80286 with 640k of dedicated 16-bit > memory. Cost: 400$ list, 275$ by mail. By now, you are already Sorry, PC disk I/O lossage means that in real terms the PC with its 4MHz bus will never ever come close to the performance of an AT unless you trash everything but the powersupply. > called "virtual 8086". DesqView will generate up to 256 totally > independent and multitasking virtual 8086/8088 PC-DOS sessions. > Further, each separate session can use its own dedicated 16 Megabytes > of Enhanced (EEMS) or regular Expanded Memory (EMS). Naturally, each Are you sure about that?? As you may know, an 8086 can itself can only address 1 ONE Megabyte of whatever... rom, ram, I/O. It takes SPECIAL hard ware known in some circles as EMS, (I perfer the apple ][ term of banked switched memory), to allow the 8086 in the PC to address more than one megabyte. If the Everex card has this hardware built into it, like the afore mentioned AST card then you are all set, if not, then your addressing limit is 1 megabyte! (for each and every virtual 8086 you've set up). > Michel > > <Fin><End> / /Carl ....decvax!mcnc!unccvax!cbenda