Program
Actions
I
--l-
Chart CC2
A
"'
OUTPUT
B
ENQ CHAR
"'
LZ INTERRUPT
c
!FOR CHAR SVCI
"'
OUTPUT PAO
0
CHAR IFFI
"'
L2 I NTERRUPT
E
!FOR CHAR SVC I
"'
OUTPUT
F
PCFsC
"'
LZ INTERRUPT
G
!MODE CHANGE!
"'
START RCV
H
TIME-OUT
"'
LZ INTERRUPT
.J
!FOR CHAR SVCI
"'
K
•
z
3.3 MS FROM
LAST SVC REQ
SET SVC REQ
IN ICW
3.3 MS FROM
LAST SVC REQ
SET SVC REQ
IN ICW
3.3 MS FROM
LAST SVC REQ
SET SVC REQ
IN ICW
(Type 1 Scanner)
Hardware Actions
(Type 2 Scanner)
•
3
CHAR IZOI
TO PDF
CHAR IFFI
TO PDF
SET PCF•C
WHEN PAO IS
SE~tf:~ET
14 MS
+
TURNAROUND
TIME OF TERMINAL
FROM LAST SVC REQ
SET SVC REQ
IN ICW
2
3
'
SOFsOO
•
I
_j_
I
4
SOF:32
PDF•ZO
SDF•ZD
PDF=FF
SOF•FF
POFa32
4
'
•
Line Set and External
Modem Interface
5
XMIT SYN 13ZI
XMIT ENQ 1201
XMIT PAO IFFI
LINE INTERFACE IS
THEN SET TO RCV
RCV TWO SYN
CHAR 1321
5
A
•
B
•
c
•
0
•
E
•
F
•
G
•
H
•
.J
•
K
Figure 9.
Exampk
of Dedicated Half-Duplex Service-Programmed for an IBM Binary Synchronous Communication Terminal
(Part 2 of 6)
Examples of Interface Sequences between the IBM 3704 and 3705 and the Communication Line
33