z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures
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Write data channel program

z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures
GC27-3667-00

The following table shows how CCWs are used in a Write data channel program.

Table 1. Write data channel program

 
 
CCW

Command
code
(hex)

 
 
Flags

 
 
Address

 
Byte
count
Select 0B or 4B 1 CC,SLI Zero 1
TIC 08 — Write CCW —

Write
2
(As many as needed)

 01 CD,SLI Output Area Length of data
Parent topic: Channel programs
1 If the UCB indicates that the device will accept the Select Write, code X'4B', it is used until a command reject is received. Then Select, code X'0B', is used.
2 The first Write CCW is pointed to by LDNACREQ.
3 The first Read Modified CCW is pointed to by LDNACREQ.

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