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A
acoustical readings,
specifications 1-10
address 20 gate 2-28
address and NMI mask register,
RT/CMOS 2-17
address map
RT/CMOS RAM 2-16
system board I/O 1-6
air temperature, specifications 1-9
alternative method of resetting 2-28
altitude, specifications 1-9
anticipated page miss 1-8
audio subsystem 3-6
B
battery 2-21
battery pack, specifications 1-13
boot
selectable drive-startup
sequence 2-29
bus master access to system board
RAM, specifications 1-8
C
cables 1-9
cache memory operation 2-2
cache, level 2 1-3
CD-ROM drive 1-2
channels
check latch 2-27
DMA 1-4
CMOS RAM 2-26
configuration 2-22
status registers 2-21
subsystem 1-3
compatibility
hardware 2-30
configuration CRC bytes, RT/CMOS
RAM 2-25
connectors
external connector 2-9
hard disk drive 2-8
keyboard 2-4
mouse 2-4
PCMCIA 3-7
system board memory (DIMM
cards) 2-14
control ports, system 2-27, 2-28
controller
diskette drive 1-4
DMA 1-4
interrupt 1-4
keyboard/auxiliary device 1-4
parallel 1-4
serial 1-4
TrackPoint III 1-4
D
data register, RT/CMOS 2-17
date-century byte, RT/CMOS RAM
configuration 2-25
depth, system unit 1-9
devices–system board 1-3
diagnostic status byte, RT/CMOS
RAM configuration 2-22
DIMM cards 2-13, 2-14
pin assignments 2-14
system board memory
connectors 2-14
diskette drive
connector 2-12
type byte 2-23
diskette drive/controller 2-11
display operating mode 2-24
displayable
characters and symbols 2-7
DMA
channels 1-4
controller 1-4, 1-8
Copyright IBM Corp. 1996, 1997 X-1