Lenovo ThinkPad A21m ThinkPad A2* Series Hardware Maintenance Manual (October - Page 48
continued, ThinkPad A20m/p, A21m/p, MB, 128 MB, or 256 MB DIMM card
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Feature Processor Bus architecture Memory (standard) Memory (optional) CMOS RAM Display Product overview Description A21p v Mobile Intel® Pentium® III processor at 850 MHz featuring Intel® SpeedStep™ technology A22m v Mobile Intel® Pentium® III processor at 800 MHz featuring Intel® SpeedStep™ technology v Mobile Intel® Pentium® III processor at 850 MHz featuring Intel® SpeedStep™ technology v Mobile Intel® Pentium® III processor at 900 MHz featuring Intel® SpeedStep™ technology v Mobile Intel® Pentium® III processor at 1 GHz featuring Intel® SpeedStep™ technology A22p v Mobile Intel® Pentium® III processor at 1 GHz featuring Intel® SpeedStep™ technology PCI Bus A20m/p v 64 MB (on the system board) v 128 MB (on the system board) A21m/p v 64 MB (on the system board) v 128 MB (on the system board) v 64 MB (64 MB SO-DIMM × 1) v 128 MB (128 MB SO-DIMM × 1) A22m/p v 64 MB (64 MB SO-DIMM × 1) v 128 MB (128 MB SO-DIMM × 1) 64 MB, 128 MB, or 256 MB DIMM card (maximum of 512 MB) 114 bytes + 128 bytes v 12.1-inch, 16M colors, SVGA (800×600 resolution) TFT color LCD v 14.1-inch, 16M colors, XGA (1024×768 resolution) TFT color LCD v 15.0-inch, 16M colors, XGA (1024×768 resolution) TFT color LCD v 15.0-inch, 16M colors, SXGA+ (1400×1050 resolution) TFT color LCD v 15.0-inch, 16M colors, UXGA (1600×1200 resolution) TFT color LCD (continued) 42 ThinkPad A20m/p, A21m/p, A22m/p