Lenovo ThinkPad 770X Technical Reference Manual for the ThinkPad 770 - Page 145

reserved bytes, RT/CMOS RAM, RT/CMOS address and NMI

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Page 145 highlights

O output protection, power supply 1-11 output voltage sequencing 1-11 overvoltage fault 1-11 P page hit 1-7 page miss 1-7 parallel controller port 1-4 passwords hard disk 2-32 power-on 2-32 supervisor 2-32 PCI error check enable 2-32 PCMCIA 3-11 interface 1-6 slots 1-4 subsystem 3-11 PCMCIA slots 1-4 Pentium 90/120MHz 1-3 performance, system 1-7 POST cache test 2-2 error codes 2-35 memory errors 2-17 password 2-30, 2-32 reset 2-30 ROM test 2-16 power supply 1-10 power-on password 2-30, 2-32 power-on self-test (POST) cache test 2-2 error codes 2-35 memory errors 2-17 password 2-30, 2-32 reset 2-30 ROM test 2-16 protected mode switch 2-30 R RAM (random access memory) 2-16 RAM I/O operations, RT/CMOS 2-21 RAM subsystem 1-3, 2-16 random access memory (RAM) 1-3, 2-16 read-only memory (ROM) 1-3, 2-16 real mode switch 2-30 real-time clock 2-19 real-time clock bytes, RT/CMOS 2-22 refresh rate, specifications 1-7 refresh request 2-32 register, CD-ROM drive 1-5 registers RT/CMOS address and NMI mask 2-20 RT/CMOS data 2-20 status 2-22, 2-23, 2-24 reserved bytes, RT/CMOS RAM configuration 2-28 reset, alternative method 2-30 ROM (read-only memory) 2-16 RT/CMOS address and NMI mask register (hex 0070) 2-20 data register (hex 0071) 2-20 RAM address map 2-19 RAM configuration configuration CRC bytes 2-28 date-century byte 2-28 diagnostic status byte 2-25 diskette drive type byte 2-26 equipment byte 2-27 hard disk drive 2, 3 type byte 2-26, 2-27 low and high base memory bytes 2-28 low and high expansion memory bytes 2-28 low and high usable memory bytes 2-28 reserved bytes 2-27, 2-28 shutdown status byte 2-25 RAM I/O operations 2-21 real-time clock bytes 2-22 status register A (hex 00A) 2-22 Index X-3

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O
output protection, power
supply
1-11
output voltage sequencing
1-11
overvoltage fault
1-11
P
page hit
1-7
page miss
1-7
parallel controller port
1-4
passwords
hard disk
2-32
power-on
2-32
supervisor
2-32
PCI error check enable
2-32
PCMCIA
3-11
interface
1-6
slots
1-4
subsystem
3-11
PCMCIA slots
1-4
Pentium 90/120MHz
1-3
performance, system
1-7
POST
cache test
2-2
error codes
2-35
memory errors
2-17
password
2-30, 2-32
reset
2-30
ROM test
2-16
power supply
1-10
power-on password
2-30, 2-32
power-on self-test (POST)
cache test
2-2
error codes
2-35
memory errors
2-17
password
2-30, 2-32
reset
2-30
ROM test
2-16
protected mode switch
2-30
R
RAM (random access
memory)
2-16
RAM I/O operations,
RT/CMOS
2-21
RAM subsystem
1-3, 2-16
random access memory
(RAM)
1-3, 2-16
read-only memory (ROM)
1-3, 2-16
real mode switch
2-30
real-time clock
2-19
real-time clock bytes,
RT/CMOS
2-22
refresh rate, specifications
1-7
refresh request
2-32
register, CD-ROM drive
1-5
registers
RT/CMOS address and NMI
mask
2-20
RT/CMOS data
2-20
status
2-22, 2-23, 2-24
reserved bytes, RT/CMOS RAM
configuration
2-28
reset, alternative method
2-30
ROM (read-only memory)
2-16
RT/CMOS
address and NMI mask register
(hex 0070)
2-20
data register (hex 0071)
2-20
RAM address map
2-19
RAM configuration
configuration CRC bytes
2-28
date-century byte
2-28
diagnostic status byte
2-25
diskette drive type byte
2-26
equipment byte
2-27
hard disk drive 2, 3 type
byte
2-26, 2-27
low and high base memory
bytes
2-28
low and high expansion
memory bytes
2-28
low and high usable memory
bytes
2-28
reserved bytes
2-27, 2-28
shutdown status byte
2-25
RAM I/O operations
2-21
real-time clock bytes
2-22
status register A (hex
00A)
2-22
Index
X-3