Lenovo ThinkPad 600E Technical Reference Manual for the ThinkPad 600 - Page 23
System Board, RT/CMOS Address and NMI Mask Register Hex 0070 - error codes
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Section 2. System Board Description 2-2 Microprocessor 2-2 Cache Memory Operation 2-2 Cacheable Address Space 2-3 Bus Adapter 2-3 Keyboard/Mouse Connector 2-4 Signals 2-4 Connector 2-4 Scan Codes 2-4 Keyboard ID 2-6 Displayable Characters and Symbols 2-7 Hard Disk Drive Connector 2-8 External Bus Connector 2-8 UltraSlim Bay Connector 2-11 Diskette Drive and Controller 2-14 Memory 2-15 ROM Subsystem 2-15 RAM Subsystem 2-15 System Memory Map 2-16 System Board Memory for the DIMM Connectors . . . . . 2-17 RT/CMOS RAM 2-18 RT/CMOS Address and NMI Mask Register (Hex 0070) 2-19 RT/CMOS Data Register (Hex 0071 2-19 RT/CMOS RAM I/O Operations 2-20 CMOS RAM Configuration 2-24 Miscellaneous System Functions and Ports 2-28 Nonmaskable Interrupt (NMI 2-28 System Control Port A (Hex 0092 2-29 System Control Port B (Hex 0061 2-30 Power-On Password 2-31 Other Passwords 2-31 Selectable Drive-Startup Sequence 2-32 Hardware Compatibility 2-33 Error Codes 2-34 Copyright IBM Corp. 1998 2-1