ries@venice.SEDD.TRW.COM (Marc Ries) (12/05/89)
[I'd ask Packard Bell, but their phone is always busy 1/2-)]
I have a Packard Bell 6/12MH 286 Clone (the Legend V/Force 286 Model)
with 1MB memory, DOS 3.3.
Q1: I would like to upgrade the 4 motherboard 256K SIMMS with
1MB SIMMS but don't know how fast I need the memory to
be (100NS? 80NS?). The current chips didn't have any speed
info on them.
Q2: The User's Manual mentions that the 80287 math co-processor
should be either 6 or 12 MH. The fastest availiable at the
most economic cost is only running 10MH. The only one I see
advertised at 12MH is the 80C287-A. Can I use either or neither?
--
Marc Ries
ries@venice.sedd.trw.com (ARPA)
somewhere!trwind!venice!ries (UUCP)
#include <std.disclaimer>BHB3@PSUVM.BITNET (12/05/89)
In article <176@venice.SEDD.TRW.COM>, ries@venice.SEDD.TRW.COM (Marc Ries) says: > > [I'd ask Packard Bell, but their phone is always busy 1/2-)] > > I have a Packard Bell 6/12MH 286 Clone (the Legend V/Force 286 Model) > with 1MB memory, DOS 3.3. > > Q1: I would like to upgrade the 4 motherboard 256K SIMMS with > 1MB SIMMS but don't know how fast I need the memory to > be (100NS? 80NS?). The current chips didn't have any speed > info on them. > > Q2: The User's Manual mentions that the 80287 math co-processor > should be either 6 or 12 MH. The fastest availiable at the > most economic cost is only running 10MH. The only one I see > advertised at 12MH is the 80C287-A. Can I use either or neither? > > >-- >Marc Ries > ries@venice.sedd.trw.com (ARPA) > somewhere!trwind!venice!ries (UUCP) > #include <std.disclaimer> At 12 Mhz, you should use 100 ns parts, but I would get 80 ns, since they cost maybe $10 more per SIMM and then you could use them in a future 386 upgrade. Checkout California Microchip in Computer Shopper. The were selling 1Mbitx9 SIMM's for $115. Brent H. Besler
cs4g6ag@maccs.dcss.mcmaster.ca (Stephen M. Dunn) (12/10/89)
In article <176@venice.SEDD.TRW.COM> ries@venice.sedd.trw.com (Marc Ries) writes:
$ I have a Packard Bell 6/12MH 286 Clone (the Legend V/Force 286 Model)
$ with 1MB memory, DOS 3.3.
$ Q1: I would like to upgrade the 4 motherboard 256K SIMMS with
$ 1MB SIMMS but don't know how fast I need the memory to
$ be (100NS? 80NS?). The current chips didn't have any speed
$ info on them.
My 12 MHz machine requires 80 ns RAM for zero wait states, and I imagine
any normal sort of speed (100, 120, 150) would work at one wait state (I'm
using 100 ns parts because that's what was on the board and I can't afford
to trash them and put in 80 ns parts).
$ Q2: The User's Manual mentions that the 80287 math co-processor
$ should be either 6 or 12 MH. The fastest availiable at the
$ most economic cost is only running 10MH. The only one I see
$ advertised at 12MH is the 80C287-A. Can I use either or neither?
Usually (always?) the 287 is run at 2/3 the clock speed of the 286, so
you shouldn't need the 12 MHz part ... but I'm not speaking from experience,
as I can't afford (or justify) a 287.
--
Stephen M. Dunn cs4g6ag@maccs.dcss.mcmaster.ca
<std_disclaimer.h> = "\nI'm only an undergraduate!!!\n";
****************************************************************************
If it's true that love is only a game//Well, then I can play pretendyap@me.utoronto.ca (Davin Yap) (12/11/89)
>In article <176@venice.SEDD.TRW.COM> ries@venice.sedd.trw.com (Marc Ries) writes: >$ I have a Packard Bell 6/12MH 286 Clone (the Legend V/Force 286 Model) >$ with 1MB memory, DOS 3.3. >$ advertised at 12MH is the 80C287-A. Can I use either or neither? Don't buy the 80C287-A for you machine! It's in a new packaging that won't fit in your coprocessor socket!! It's a low-power cmos part that fits in some new laptops. Davin --