IBM Personal System/2 50 - Page 64

Identification, adapter 3-3
interrupt O reset 3-25
interrupts
/O address map 1-6
1/O function byte 2-8
K
keyboard (electrical) 1-9
L
light, fixed disk drive activity 1-11
light, power 1-11
map, memory 3-8
math coprocessor 1-4
memory
connectors 3-9
control register 2-9
map 3-8
memory module packages 3-7
performance 1-7
random access 3-7
readonly 3-7
refresh 1-7
memory refresh 3-4
memory size miscompare 3-19
microprocessor
alternate reset 3-26
real address mode 3-26
miscellaneous ports 3-24
mode switch compatibility 3-26
model byte 1-3
modules, memory 3-7
N
NMI mask 3-13
NMI service 3-4
NMI signal 3-4
noise readings 1-10
nonmaskable interrupt (NMI) 3-24
X-2. Index
Oo
output voltage sequencing 1-12
outputs, power supply 1-11
overvoltage fault 1-12
P
parallel port 2-8
Parity check enable 3-25
password, power-on 3-27
performance, system 1-7
pointing device (electrical) 1-9
portB 3-24
POS
See programmable option select
POS registers 2-8
power Specifications 1-9
power supply description 1-11
power supply LED 1-11
power supply output
protection 1-12
power supply outputs 1-11
programmable
option
select
2-3
enable/setup register 2-7
registers 2-5
system board I/O byte 2-8
system board setup 2-6
system configuration
utilities 2-3
Programming, arbiter 3-5
protection, power supply 1-12
R
RAM enable 2-9
random access memory (RAM) 3-7
read-only memory 3-7
real mode addressing 3-26
real-time clock bytes 3-15
refresh 3-4, 3-7
refresh request 3-25
registers
card selected feedback 2-6
enable/setup 2-7
memory contro! 2-9
miscellaneous system 3-24