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Accessing the VTOC with CVAF Macros z/OS DFSMSdfp Advanced Services SC23-6861-01 |
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The common VTOC access facility (CVAF) macros and tasks discussed
in this section consist of the following:
When calling CVAF, your program can be in either 24-bit or 31-bit
addressing mode. If it is in 31-bit mode, the control blocks shown
in Figure 1 might reside above
the 16 MB line. All these areas must be accessible in your program's
storage key.
Note: You must supply a UCB address that matches the
caller's AMODE. That is, AMODE=24 requires a 24 bit UCB address,
while AMODE=31 requires a 31 bit UCB address.
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Copyright IBM Corporation 1990, 2014
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