On 7/16/02 8:05 AM Gérard Mittaux-Biron [EMAIL PROTECTED]
wrote:
> I am trying to install a 256 Mb RAM on the lower slot of a
>PowerBook Wallstreet (second generation, I think), which already has a
>128 Mb on the upper slot.
> But when I switch the machine on again, Apple system profiler
>(either on OS 9 or X) only detects 256 Mb... Until now, I thought that
>256+128 would be around 384, a little bit far from 256.
> I heard about problems sometimes ago with installing RAM bigger
>than 128 Mb on powerbooks, could this be my problem ?
> Thanks in advance.
>Gérard.
Gerard,
2 things:
First, as someone mentioned, check Apple System Profiler to ensure that
both chips are being recognized. If it shows the 256 on the bottom slot
and nothing in the top slot, that means that the 128 is bad or
unrecognized for some reason.
If ASP recognizes both as 128 chips then the problem is that you have a
high density 256MB chip.
The WS will only recognize low density chips.
I'm not sure about Lombards but Pismos and TiBooks use high density chips.
Using low density memory chips the Wallstreet can definitely go to 512MB,
256 bottom and 256 top.
Joe
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