IBM 1 Series - Page 189

integrated digital input/output feature (continued)
operational characteristics 5-9
digital input 5-6
digital output 5-4
physical characteristics 5-9
customer access panel connections 5-12
jumper selections 5-17
signal pin assignments 5-9
pin assignments 5-10
interrupt
presentation
teletypewriter adapter 4-14
timer feature 3-9
requests (DPC adapter lines) 6-6
service active (DPC adapter line) 6-5
service sequence
description 2-22
DPC adapter 6-10
use of data bus 2-7
subset (I/O channel lines) 2-5
timer feature 3-8
interval timer 3-7
IPL (see initial program load)
isolated contact sense (teletypewriter adapter) 4-1, 4-22
jumper selections
DPC adapter 6-2]
integrated digital I/O 5-17
teletypewriter adapter 4-24
timer card 3-5
line definition
poll group) 2-12
service group 2-7
load characteristics, unit 2-55
locations 2-65
logic voltage sequencing 2-66
modifier bits (DPC adapter lines) 6-4
non-interrupting mode
digital input 5-6
digital output 5-4
nonisolated contact sense (teletypewriter adapter) 4-1, 4-22
normal receive operation 4-13
operational characteristics
DPC adapter feature 6-8
integrated digital I/O feature 5-4
processor I/O channel 2-15
teletypewriter adapter feature 4-12
timer feature 3-8
operational power considerations 2-48
operational sequences on the channel 2-15
operations
digital input 5-6
digital output 5-4
normal receive 4-13
overrun receive 4-13
receive 4-17
transmit 4-16
X4 GA34-0033
output
byte transfer 2-8
circuits (teletypewriter adapter) 4-23
levels, DO 5-9
sequence, DPC adapter 6-8
word transfer 2-8
output circuits (teletypewriter adapter) 4-9
overrun receive operation 4-13
overvoltage, circuit module 2-66
physical characteristics
DPC adapter feature 6-13
integrated digital I/O feature 5-9
processor I/O channel 2-66
teletypewriter adapter feature 4-29
timer feature 3-1
PI (see process interrupt)
pin assignments (see also connections, TCC/CAP)
channel repower feature 2-75
DPC adapter feature 6-13
integrated digital I/O feature 5-10
processor I/O channel 2-67
socket adapter feature 2-80
teletypewriter adapter feature 4-29
timer feature 3-11
plugging device attachments, sequence of 2-73
poll
and poll prime tags 2-13
bypass mechanism 2-13
group line definitions 2-]2
group of signal lines 2-3
identifier 2-12
mechanism 2-42
propagate 2-14
return 2-14
sequence description 2-27
power
considerations, operational 2-48
failure (teletypewriter adapter) 4-21
supplies
electrical characteristics 2-66
teletypewriter adapter 4-28
transitions and resets, status after 3-9
power-on reset
channel 2-11
DPC adapter line 6-7
printed circuit
card, standard IBM 2-72
wire length (I/O channel) 2-65
process interrupt (PI) 1-3
digital input/output feature 5-3
mode 5-6
processor and I/O expansion unit board 2-7]
cycle-steal service 2-24
processor I/O channel 1-2, 2-1
attachment features 2-73
channel repower 2-73
socket adapter 2-77
electrical characteristics 2-50
attachment considerations 2-65
capacitance loading 2-61