Each time your routine is executed, MFX will place the address of a three-word parameter list in Register 1. The parameter list will be on a fullword boundary. The first word contains the number of the control field within the record in byte 4. The second word contains the address of the control field in the work area in bytes 2, 3, and 4. The third word contains the length of the control field in bytes 3 and 4. All values are given in hexadecimal and the unused bytes are filled with zeros.
Table 1. Parameter List for E61
|
Byte 1
|
Byte 2
|
Byte 3
|
Byte 4
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|
00
|
00
|
00
|
Number of control field
|
|
00
|
Address of control field in work area
|
|
00
|
00
|
Length of control field
|
|