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 2-31
power-on 2-31
supervisor 2-31
PC Card
subsystem 3-9
PCI error check enable 2-31
PCMCIA 3-9
interface 1-6
slots 1-4
Pentium 90/120 MHz 1-3
performance, system 1-7
POST
cache test 2-2
error codes 2-34
memory errors 2-16
password 2-29, 2-31
reset 2-29
ROM test 2-15
power supply 1-10
power-on password 2-29, 2-31
power-on self-test (POST)
cache test 2-2
error codes 2-34
memory errors 2-16
password 2-29, 2-31
reset 2-29
ROM test 2-15
protected mode switch 2-29
R
RAM (random access
memory) 2-15
RAM I/O operations,
RT/CMOS 2-20
RAM subsystem 1-3, 2-15
random access memory
(RAM) 1-3, 2-15
read-only memory (ROM) 1-3, 2-15
real mode switch 2-29
real-time clock 2-18
real-time clock bytes,
RT/CMOS 2-21
refresh rate, specifications 1-7
refresh request 2-31
register, CD-ROM drive 1-5
registers
RT/CMOS address and NMI
mask 2-19
RT/CMOS data 2-19
status 2-21, 2-22, 2-23
reserved bytes, RT/CMOS RAM
configuration 2-27
reset, alternative method 2-29
ROM (read-only memory) 2-15
RT/CMOS
address and NMI mask register
(hex 0070) 2-19
data register (hex 0071) 2-19
RAM address map 2-18
RAM configuration
configuration CRC bytes 2-27
date-century byte 2-27
diagnostic status byte 2-24
diskette drive type byte 2-25
equipment byte 2-26
hard disk drive 2, 3 type
byte 2-25, 2-26
low and high base memory
bytes 2-27
low and high expansion
memory bytes 2-27
low and high usable memory
bytes 2-27
reserved bytes 2-26, 2-27
shutdown status byte 2-24
RAM I/O operations 2-20
real-time clock bytes 2-21
status register A (hex
00A) 2-21

X-3