The 50 and 75 MHz Butterfly's have 4 and 8 MBs of base memory
respectively. The series has a single memory expansion slot that
will accept a special 4, 8, 16 or 32 MB small-outline (SO) 3.3-volt 72-pin
dual inline memory module (DIMM).
Although this is non-parity memory, it ain't cheap.
Here's the options page for
IBM memory upgrades. It's interesting to note that
IBM no longer advertises 32 MB DIMMs for the Butterfly.
(They do exist though; I have three Butterflies with
IBM part number 92G7281 DIMMs in them.)
In fact, the main
ThinkPad 701 page used to say that the maximum memory for the
701C/701CS was 36MB/40MB but now says it is 20MB/24MB.
Third party memory is available from companies including:
vendors offer 32 MB DIMMs
According to the Kingston web page, the part number for the 32 MB DIMM is KTM TP701/32. The Viking Components web page says the 32 MB DIMM part number is I7281. The other third party vendors do not offer this size. (And now apparently IBM does not either.)
Genuine IBM memory has a three warranty while the third party vendors give "limited lifetime" warranties. It also usually costs more.
I used the Windows 95 devices control panel to generate it. It's more detailed than the IBM ThinkPad Memory Maps page. This information was invaluable while configuring Wildboar.
Start End Description 00000000 0009ffff unavailable for use by devices 000a0000 000affff chips & tech accel 000b0000 000b7fff unavailable for use by devices 000b8000 000bffff chips & tech accel 000c0000 000c9fff chips & tech accel 000ca000 000cbfff pnp bios 000cc000 000effff available 000f0000 000fffff pnp bios 00100000 003effff unavailable for use by devices 003f0000 003fffff chips & tech accel 00400000 007fffff unavailable for use by devices 00800000 00800fff pcmcia card services 00801000 00fdffff available 00fe0000 00ffffff unavailable for use by devices
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Copyright © 1996, 1997, 1998, 2001, 2005
Craig Leres