> -----Original Message-----
> From: PowerBooks [mailto:[EMAIL PROTECTED]]On Behalf Of
> Cameron Kaiser
> Sent: Friday, March 29, 2002 6:13 AM
> To: PowerBooks
> Subject: Re: 1400 RAM irritation
>
>
> > > > The Apple removable module is actually only 8 megs,
> with the other 8
> > > > megs soldered on the motherboard. I have a theory
> that if you take
> > > > off the apple 8 meg card, everything else will work.
> Sometimes
> > > > having 3 RAM modules makes for a finnicky PB1400.
>
> > > And you were right, along with John McGibney and the
> others who suggested
> > > this. It now comes up with 56MB. This is a 1400cs/117
> if that makes any
> > > difference -- does this problem seem to be more common
> with older 1400s?
>
> > Im not sure if is the apple card or one of the other
> cards. I also
> > dont know if it matters if its the older version of the
> 1400 or the
> > newer one. Sometimes having 3 modules is trouble. Try
> adding the 4
> > meg apple card back in and see if you can get to 60 megs.
>
> This, also, worked. It would appear, then, that the problem
> was the 8MB
> "Apple module" that I installed in there -- I guess the
> /117 only will work
> with its original 4MB module?
>
> Again, many thanks.
>
I also have a similar problem with a PB1400/177 (now a 133 using a
'hacked'166 processor).
I have 2x 24Mb cards and if I have the 8Mb module in it I get memory
errors (the 8Mb IS ok as it works in any other combination) but the PB
is fine with the 4Mb, in my case I think that the problem is due to
the fact that I re-built one of the 24Mb cards using EDO chips in 1 of
the banks, as far as I can ascertain, the PB will try to interleave
the RAM when you have 8+8 & 24+24 (matching banks), a 32Mb and a 16Mb
will look like 2x 24Mb to the PB and unless they are identical chips
then they probably will not interleave.
I have just got some more FPM chips today (I bought a box of 60 old PC
notebook SODIMS for £15 to rob the chips off) and I will re-build my
24Mb card and see if it works ok.
Also I am trying to work out the details on the Japanese site to hack
the 8Mb card to 16Mb, if this works then I will also try to do the
same to the motherboard and see if I can get the PB up to 80Mb!!
Ben.
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