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Specifications

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System Macros Invoked by Drivers
REQDPR
REQDPR
Requests a UNIBUS adapter buffered data path.
Format
REQDPR
Description
The REQDPR macro calls IOC$REQDATAP to request a UNIBUS adapter
buffered data path.
When the REQDPR macro is invoked, the following registers must contain the
following values:
Register Contents
R5 Address of UCB
00(SP) Address of caller’s caller
The REQDPR macro destroys the contents of R0 through R2.
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