Lombard RAM in Pismo?

2005-10-09 Thread Dante McLean
Is RAM used in Lombard the same stuff that goes in Pismo?  My Mom's 
Lombard hard drive just died, and it makes more sense to buy a new 
machine at this point (case is in brutal shape) than to replace the 
drive.  I'm hoping to pick the carcass before we bury it.


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Re: Lombard RAM in Pismo?

2005-10-09 Thread PeterH5322

Is RAM used in Lombard the same stuff that goes in Pismo?  My Mom's 
Lombard hard drive just died, and it makes more sense to buy a new 
machine at this point (case is in brutal shape) than to replace the 
drive.  I'm hoping to pick the carcass before we bury it.

Yes and no.

Early Wallstreet and Lombard RAM is PC66, although some owner-installed 
SODIMMs may be PC100.

Pismo is always PC100 or better, and was PC100 from the factory, although 
PC133 may be owner installed.

If you SODIMMs are PC100 or better, and read as their correct sizes on 
your Lombard, they will work in a Pismo.

The reverse is not true.

Only early PC100 SODIMMs will work in the early machines.

Most PC133 SODIMMs will not work in a Wallstreet or Lombard because these 
machines cannot accept very high density DRAM chips, or so-called low 
profile SODIMM sticks which consist of more than one bank.

Both the Lombard and the Pismo require a special hard drive which will 
auto-negotiate down to ATA-5.

The latest ATA-6 drives will not do that.

The just discontinued Hitachi/IBM 5K80 ATA-6 drive (20, 30, 40, 60, 80 
GB) WILL auto negotiate. The same sized Samsungs and Toshibas and WILL 
NOT.

The Hitachi/IBM replacement for the 5K80 also WILL NOT auto-negotate.

The Wallstreet will accept just about any drive, whether it will 
auto-negotiate, or not.


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Re: Lombard RAM in Pismo?

2005-10-09 Thread PeterH5322

It could but it depends on chip density. Pismo can use higher density memory
chips that sometimes older memory managers in the Lombard and Wallstreet can
fully recognize.

Mostly, the Lombard and Wallstreet memory managers cannot accept higher 
density DRAM chips.

Watch out for double-sided SODIMM sticks which are made using higher 
density chips. These are organized as two bank sticks, and only the 
Pismo can recognize the second bank.

A 256 MB stick will be read as a 128 MB stick, in these cases.

Generally, 128 MB sticks will always be read as 128 MB, on all machines.

It is conceivable that a 512 MB stick could be read as a 128 MB stick, 
although I have no t put this conjecture to the test in a Wallstreet or 
Lombard.

Wallstreets or Lombards are limited to 256 MB sticks and to 512 MB total 
RAM.

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