VR pacing window size calculation exit routine parameter list

When the exit gets control, the address of the following parameter list is in register 1.

Table 1. VR pacing window size calculation exit routine parameter list
Dec (Hex) offset	Size (Bytes)	Description
0 (0)	4	VR identifier: Byte 0 = X'00' Byte 1 = X'00' Byte 2 = VR number Byte 3 = Transmission priority
4 (4)	4	Explicit route number
8 (8)	4	Destination subarea number
12 (C)	4	Adjacent subarea number
16 (10)	4	Explicit route length. (This length is equal to the total number of transmission groups in the explicit route.)
20 (14)	4	Total number of defined or operative explicit routes that traverse, but do not end in, the given adjacent subarea
24 (18)	4	Address of explicit route characteristics table