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Specifications

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System Macros Invoked by Drivers
RELMPR
RELMPR
Releases a set of UNIBUS map registers or a set of the first 496 Q22–bus map
registers allocated to the driver.
Format
RELMPR
Description
The RELMPR macro calls IOC$RELMAPREG to release a set of map registers
allocated to the driver. When the RELMPR macro is invoked, R5 must contain
the address of the UCB. RELMPR destroys the contents of R0 through R2.
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