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Memory (standard) X20, X21
v 64 MB (on the system board)
v 128 MB (on the system board)
X22, X23, X24
v 128 MB (on the system board)
v 256 MB (on the system board plus
128 MB DIMM)
Memory (optional) X20, X21
v 64 MB, 128 MB, or 256 MB SDRAM
card (maximum of 320/384 MB)
X22, X23, X24
v 64 MB, 128 MB, 256 MB or 512 MB
SDRAM card (maximum of 640 MB)
CMOS RAM X20, X21
v 114 bytes +4 Kbytes
X22, X23, X24
v 256bytes
Display X20, X21
v 12.1-inch, 16M colors SVGA
(800×600 resolution) TFT color LCD
v 12.1-inch, 16M colors XGA
(1024×768 resolution) TFT color LCD
X22, X23, X24
v 12.1-inch, 16M colors XGA
(1024×768 resolution) TFT color LCD
Hard disk drive X20, X21
v 10GB, 20GB
X22
10GB, 15GB, 20GB, 30GB
X23, X24
20GB, 30GB
I/O port X20, X21
v USB, RJ11, RJ45, VGA, Mic, Line-in,
Headphone, Docking, 1394 (Some
Models)
X22, X23, X24
USB, RJ11, RJ45, VGA, Mic, IrDA,
Line-in, Headphone, Docking, 1394
(Some Models)
Internal modem X20, X21, X22, X23, X24
v V.90 D/F
Chapter 3. ThinkPad X20, X21, X22, X23, X24 43