IBM 3704 Reference Manual page 31

Program
Actions
Program Actions
(Type
1 Scanner)
Hardware Actions
(Type
2 Scanner)
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PROGRAM DELAY FDR
,.__.... TERMINAL TURNAROUND
OUTPUT PAD
AND DATA
SET PCF•8
L2 INTERRUPT
!FOR CHAR SVCI
OUTPUT DATA
CHAR !XI I
L2 INTERRUPT
I FOR CHAR SVC I
OUTPUT DATA
CHAR IX21
L2 INTERRUPT
I FOR CHAR SVC I
TIME FROM OUTPUT
TO SET XMIT MDDE1
1,6 US MIN
7.6
MS MAX
15
MS FROM SET OF
XMIT MODE TO
SET SVC REQ
SET SVC REQ
IN ICW
67.5
MS FROM
LAST SVC REQ
SET SVC REQ
IN ICW
67.
5 MS FROM
LAST SVC REQ
SET SVC REQ
IN ICW
2
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CHAR IXI I
TO PDF
CHAR IX21
TO PDF
3
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SDFz003
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PDF=34
SDF:003
PDF=34 !CIRCLE DI
SDFs34 !CIRCLE DI
PDF.XI
SDF=XI
PDF=X2
Line Set and External
Modem Interface
•
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SET XMIT MODE
SEND 2 MARK
BITS
SEND
!CIRCLE DI
SEND !XII
Figure 6.
Example
of Dedicated-Duplex Service-Programmed for the IBM 1050 Communication System (Part 3 of 4)
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Examples of Interface Sequences between the IBM 3704 and 370S and the Communication Line 25