20 Oct
1997
20 Oct
'97
4:41 a.m.
Whatever the coprocessor for the 386 SX was, does anyone have one?
I heard that (at one time) there was a software emulator for a
coprocessor...anyone ever heard of it?
Thanks
manney(a)nwohio.com
20 Oct
20 Oct
7:45 a.m.
Whatever the coprocessor for the 386 SX was, does
anyone have one?
I heard that (at one time) there was a software emulator for a
coprocessor...anyone ever heard of it?
Thanks
manney(a)nwohio.com
Oh wow... what you're using this 386sx for? :) Yeah, you can still
get those coprocessors easily if you use the www.ebay.com for that or
request through the proper newsgroups.
IIT, Intel are ok. I consider the IIT the most least power draw for
the notebooks. In fact, I have one in that LTE 386s/20. Please
consider the computer's speed and find the 387 mhz speed that meets
or exceeding it is no problem. Used mine at 20mhz on that 25mhz
copro chip until I changed the CPU and oscillator to 25mhz on that
LTE 386s/20 without problems.
Don't bother with the copro emulators. Total fluke and a drag on the
computer if that works. Yes, I tried that. Seems one purpose is to
fool some s/w that insists on that chip to work by making it fooled
to make it go.
THose copro chips are dirt cheap because of all 486 and pentiums made
them a "need" than luxtry item. Example: Quake gets better with one
that is fastest possible.
Jason D.
11:40 a.m.
Due to massive amounts of caffeine & sleep deprivation, PG Manney said:
Whatever the coprocessor for the 386 SX was, does
anyone have one?
I heard that (at one time) there was a software emulator for a
coprocessor...anyone ever heard of it?
Yup, and yup.
1) I have a couple co-processors -- make me an offer.
2) I saw several emulators, but the only one I found that actually worked
well, the file was called "FRANKE87" and was German in origin. It actually
fooled AutoCad 10 into believing there was a co-processor chip on my 386SX
and actually did speed up FP instructions (measured with CheckIt).
I may have a copy of it somewhere, but that's no guarantee, as my 386 has
been sold for a coupla years now, and my P150+ doesn't need it. ;-)
HTH,
"Merch"
--
Roger Merchberger | Why does Hershey's put nutritional
Programmer, NorthernWay | information on their candy bar wrappers
zmerch(a)northernway.net | when there's no nutritional value within?
8:07 a.m.
Due to massive amounts of caffeine & sleep
deprivation, PG Manney said:
Not. Autocad is
processor heavy program and better unload that FP to
that coprocessor result in even powerful system when using the
suitable s/w like autocad.
Whatever the coprocessor for the 386 SX was, does
anyone have one?
I heard that (at one time) there was a software emulator for a
coprocessor...anyone ever heard of it?
Yup, and yup.
1) I have a couple co-processors -- make me an offer.
2) I saw several emulators, but the only one I found that actually worked
well, the file was called "FRANKE87" and was German in origin. It actually
fooled AutoCad 10 into believing there was a co-processor chip on my 386SX
and actually did speed up FP instructions (measured with CheckIt).
I may have a copy of it somewhere, but that's no guarantee, as my 386 has
been sold for a coupla years now, and my P150+ doesn't need it. ;-)
HTH,
"Merch"
--
Roger Merchberger | Why does Hershey's put nutritional
Programmer, NorthernWay | information on their candy bar wrappers
zmerch(a)northernway.net | when there's no nutritional value within?
Oh, that reminds me, what is your speed rating on these chips?
I have another system that cantake one as well if the cost is cheap
and the area is US or Canada.
Take care.
Jason D.
1:25 p.m.
Due to massive amounts of caffeine & sleep deprivation, jpero(a)cgo.wave.ca
said:
> 2) I saw several emulators, but the only one I
found that actually worked
> well, the file was called "FRANKE87" and was German in origin. It actually
> fooled AutoCad 10 into believing there was a co-processor chip on my 386SX
> and actually did speed up FP instructions (measured with CheckIt).
Not. Autocad is processor heavy program and better
unload that FP to
that coprocessor result in even powerful system when using the
suitable s/w like autocad.
Uh, we're both right. I'm at work and don't have much time to type, so I
did not fully state my position. What I meant to way was:
The co-processor emulation software executed FP instructions faster than a
machine could _without_ a co-processor.
IIRC, CheckIt reported ~60,000 Dhrystones (or was that Whetstones -- I
always get them mixed up... FP operations, anyway. :-) with no
co-processor, and ~71,000 Dhrystones with the co-processor software
emulation. Of course, when I added a hardware 80387SX, Checkit reported
just over 1 Million Dhrystones -- so of course the hardware is faster.
Thanks for keeping me honest!
BTW, it is my belief that Autocad is the hardest program to fool into
thinking there's a coproc. when there isn't. The pgm. mentioned is the
_only_ one I'd found, and it didn't work with V.12 or V.13. (I never ran
V.11, so I don't know.) Also, IMHO it is better to be working than not,
even if working very slowly. (And AutoCad V.10 with the emulator wasn't too
bad as long as you stuck with small 2D files. (rendering, of course, would
be an exercise in masochism! ;-)
Oh, that reminds me, what is your speed rating on these
chips?
I have another system that cantake one as well if the cost is cheap
and the area is US or Canada.
Dunno -- hafta look. It's sitting in my computer desk at home.
I think I have a couple, tho. I also have a 386DX25, if anyone's
interested. I do like trades, too.
HTH,
"Merch"
--
Roger Merchberger | Why does Hershey's put nutritional
Programmer, NorthernWay | information on their candy bar wrappers
zmerch(a)northernway.net | when there's no nutritional value within?
10:30 a.m.
Merch,
Nip!
>Not. Autocad is processor heavy program and
better unload that FP to
>that coprocessor result in even powerful system when using the
>suitable s/w like autocad.
Nip!
The co-processor emulation software executed FP
instructions faster than a
machine could _without_ a co-processor.
Ok. but not always usually.
IIRC, CheckIt reported ~60,000 Dhrystones (or was that
Whetstones -- I
always get them mixed up... FP operations, anyway. :-) with no
co-processor, and ~71,000 Dhrystones with the co-processor software
emulation. Of course, when I added a hardware 80387SX, Checkit reported
just over 1 Million Dhrystones -- so of course the hardware is faster.
Thanks for keeping me honest!
No problem!
Checkit is not true indictor of performance, it's so easy on CPU so
it get fooled by the emulator than other way around. Very general
check to make sure things works and meet clocking rating.
Right now I'm using this checkit 3.0 to debug a motherboard because I
am trying to get it into turbo mode by keyboard, It's Nec Powermate
386 33i (386dx 33 cached all in one board). What is the key combo
to enable turbo? It's Phoenix bios. Currently I got it bare from
susplus for 5 dollars then plugged cpu and memory to it. Made up
both keyboard and the power supply adapters. Got speaker, hard
drive light and the 5v, grounds all traced out along with that 14pin
header that also connects to keyboard. Not yet to find out the
power/speed light. Any takers on this info or comments how this
design is done? BTW tried bi color two leaded LED for this with no
luck. Did this 14 pin header also carry PS/2 mouse signals too?
Nip!
even if working very slowly. (And AutoCad V.10 with
the emulator wasn't too
bad as long as you stuck with small 2D files. (rendering, of course, would
be an exercise in masochism! ;-)
OUch!
Dunno -- hafta look. It's sitting in my computer
desk at home.
I think I have a couple, tho. I also have a 386DX25, if anyone's
interested. I do like trades, too.
Oh man 386dx 25 is too popular already, I have
several along with AMD
386 40 (couple) and slow 386/387-20 as well.
Also to point this way of cost of getting 486's are now cheap as
pennies: I have 486sx 33 and one dx2 66 but no good board yet!
Also lot of pentium 60/66, and 75 are cheap now.
HTH,
"Merch"
--
Roger Merchberger | Why does Hershey's put nutritional
Programmer, NorthernWay | information on their candy bar wrappers
zmerch(a)northernway.net | when there's no nutritional value within?
1:08 p.m.
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8:24 a.m.
Whatever the
coprocessor for the 386 SX was, does anyone have one?
Sure - they're readily available from all the usual electronics
suppliers. For example, Jameco stocks the following:
51908 80387-16SX IC,80387-16SX
51924 80387-20SX IC,80387-20SX
51941 80387-33 IC,80387-33
76531 80387-25SX IC,80387-25SX 68PLCC
76582 80387-40 IC,80387-40 Tim
Jason D.
1:45 p.m.
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9:10 a.m.
Sure - they're readily available from all the
usual electronics
suppliers. For example, Jameco stocks the following:
51908 80387-16SX IC,80387-16SX
51924 80387-20SX IC,80387-20SX
51941 80387-33 IC,80387-33
76531 80387-25SX IC,80387-25SX 68PLCC
76582 80387-40 IC,80387-40
Thanks... they're overpriecd than what they're really worth.
9767
days inactive
9767
days old
9 comments
4 participants
participants (4)
-
jpero＠cgo.wave.ca -
manney＠nwohio.com -
shoppa＠alph02.triumf.ca -
zmerch＠northernway.net