IBM Personal System/2 50 - Page 65

registers (continued)
portB 3-24
POS 2-5, 2-8
RT/CMOS and NMI mask 3-13
RT/CMOS status registers 3-16
reset, alternate 3-26
RT/CMOS address register 3-13
RT/CMOS RAM__ 3-12
password 3-26, 3-27
secured area 3-26
S
second fixed disk type byte 3-21
sequencing, output voltage 1-12
serial communications
controller 3-28
serial port 2-8
serial port controller 3-28
setup
system board 2-6
system board I/O byte 2-8
warning 2-3
shutdown status byte 3-20
size 1-9
sound specifications 1-10
speaker data enable 3-25
specifications 1-7
status registers (RT/CMOS) 3-16
status, watchdog 3-26
switch to real mode 3-26
system address map 1-6
system board
block diagram 1-5
features 1-4
\/O address map 1-6
/O byte 2-8
memory 3-7
memory connectors 3-9
memory enable 2-9
memory map 3-8
setup 2-4
system board setup 2-6
system configuration utilities 2-3
system control port A 3-25
system ports, miscellaneous 3-24
system reset 3-24
system unit specifications 1-7
T
time status indicator 3-19
timer status, watchdog 3-26
type 1 memory connector 3-9
type 2 memory connector 3-10
U
useable memory 3-23
utilities, configuration 2-3
valid RAM bit 3-18
video subsystem setup 2-4
W
warning, POS 2-3
watchdog status 3-26
weight 1-9
Index X-3