Specifications

System Macros Invoked by Drivers
LOADUBA
LOADUBA
Loads a set of UNIBUS map registers or a set of the first 496 Q22–bus map
registers.
Format
LOADUBA
Description
The LOADUBA macro calls IOC$LOADUBAMAP to load a set of UNIBUS map
registers or a set of the first 496 Q22–bus map registers. Map registers must
already be allocated before the LOADUBA macro can be invoked.
When the LOADUBA macro is invoked, register R5 must contain the address of
the UCB. LOADUBA destroys the contents of R0 through R2.
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