Strange. Is the 256MB dimm the only one currently installed in the Wallstreet? If so, reinstall the 256MB dimm back in the Pismo it came from to confirm that it is not damaged.
Damage aside, it may be possible that the ram is incompatible with your Wallstreet. If I recall correctly, the Wallstreet and Pismo have different system bus speeds, and thus different RAM requirements. But I could be wrong.
[EDIT]
I just checked Apple's specifications for the Wallstreet and Pismo series, and while the RAM appears to be compatible, the Wallstreet is only rated for up to 192MB of RAM total. While I know that it will work with more (my WallStreet had a good 384MB installed and worked fine for many a years), it may be that your model is simply more finicky than mine was. Also, what slot is the RAM installed in. If possible, try putting it in the opposite slot (if it will fit) and see if that helps.
most likely your porblem is that the wallstreets had an 87Mhz system bus, the later models (Pismo) have 66Mhz system busses. if your Pismo has PC66 ram, it won't read as a full 256MB chip.
According to Apple's Technotes, WallStreet cannot properly address RAM modules that use RAM units (each black chip) larger than 128Mbit.
I have 512MB RAM in my WallStreet; my first attempt at this was with 256MB RAM modules that each had 8 units on (ie, each unit was a 256Mbit unit). It meant that the WallStreet could only see (and thus address) 128MB on each module. Changing to modules with 16 units (ie, each unit being a 128 Mbit one) gave me the desired 256 MB RAM from each module.
Does anyone out there have any experience with 512 MB RAM modules for WallStreet?
Comments
Damage aside, it may be possible that the ram is incompatible with your Wallstreet. If I recall correctly, the Wallstreet and Pismo have different system bus speeds, and thus different RAM requirements. But I could be wrong.
[EDIT]
I just checked Apple's specifications for the Wallstreet and Pismo series, and while the RAM appears to be compatible, the Wallstreet is only rated for up to 192MB of RAM total. While I know that it will work with more (my WallStreet had a good 384MB installed and worked fine for many a years), it may be that your model is simply more finicky than mine was. Also, what slot is the RAM installed in. If possible, try putting it in the opposite slot (if it will fit) and see if that helps.
ciao,
michael
[ 08-22-2002: Message edited by: scadboy ]
[ 08-22-2002: Message edited by: scadboy ]</p>
at least that's my guess.
I have 512MB RAM in my WallStreet; my first attempt at this was with 256MB RAM modules that each had 8 units on (ie, each unit was a 256Mbit unit). It meant that the WallStreet could only see (and thus address) 128MB on each module. Changing to modules with 16 units (ie, each unit being a 128 Mbit one) gave me the desired 256 MB RAM from each module.
Does anyone out there have any experience with 512 MB RAM modules for WallStreet?
engpjp
BTW,trivia:
wallstreet bus = 83.333
Pismo bus = 100 mhz