IBM 3704 Reference Manual page 38

Program Actions
(Type 1 Scanner)
Program
I
--~o~--1-----
1
Hardware Actions
(Type 2 Scanner)
Chart CCl
2
'
3
A
START
•
OUTPUT TIME FROM SET AT BIT SVC
SET MODE MODE TO SVC REQ
sc~~NDmo~~DE
B
PCF":I
START 572 US MAX IN LIB.
TIME-OUT I .6 US MIN SET PCF::i:O
•
SET SVC REQ
c L2 INTERRUPT IN ICW
•
OUTPUT PAD TIME F"ROM OUTPUT UNTIL
AND F"IRST
REQ TO SEND IS ACTIVE:
D SYN CHAR.
SET PCF:8 572 US MAX
1.6 us
MIN
•
E
•
TIME F"ROM BIT SVC AND
CLEAR TO SEND UNTIL
SVC REQ:
3.3 MS
L2 INTERRUPT SET SVC REQ
F IF"OR CHAR SVCI IN ICW
•
OUTPUT
SYN CHAR
G SECOND
TO PDF"
SYN CHAR
•
3.3 MS FROM
LAST SVC REQ
L2 INTERRUPT
SET SVC REQ
H I F"OR CHAR SVC I
IN ICW
•
..J
•
K
. .
2
. .
3
'
. .
I
-I-
I
4
SDF"=038
DELAY F"OR CLEAR
TO SEND: MODEM
DEPENDENT
SDF"=AA
PDF=32
SDF"=32
PDF"=32
'
. .
Line Set and External
Modem Interface
DATA TERM ROY, CLK
MODEecgs~R~EgJ!:rAND
REQ TO SEND
TO DATA SET
XMIT PAD IAAI
XMIT SYN 1321
5
A
•
B
•
c
•
D
•
E
•
F
•
G
•
H
•
..J
•
K
Figure 9.
Example
of Dedicated Half-Duplex Service-Programmed for an IBM Binary Synchronous Communication Terminal
(Part 1of6)
32 IBM 3704 and 3705 Communications Controllers Original Equipment Manufacturers' Information