IBM 5150 - Page 301

c
use of 5-3
bit map, I/O 8255A 1-31
block diagram (coprocessor) 2-6
break (keyboard extended code) 5-21
CCITT 8-3
standards 8-3
CH CK,negative (-channel check), I/O channel 1-21
channel check, negative (-CH CK), I/O channel 1-21
character codes (keyboard) 5-15,5-17
character set
quick reference 7
-12
clock (CLK), I/O channel 1-20
communications 8-3
component diagram, system board 1-16
D
data
bits
0 to 7 (DO-D7) 1-21
flow, system board diagram 1-5
decimal integers (coprocessor) 2-3,2-4
description I/O channel 1-20
diagram system board 1-16
diagram, 110 channel 1-18
DMA request 1 to 3 (DRQI-DRQ3) 1-21
DOS,
keyboard function
5-8,5-14,5-22
keyboard functions 5-24
Index-2