Specifications

System Macros Invoked by Drivers
LOADMBA
LOADMBA
Loads MASSBUS map registers.
Format
LOADMBA
Description
The LOADMBA macro calls IOC$LOADMBAMAP to load MASSBUS map
registers. The driver must own the MASSBUS adapter, and thus the map
registers, before it can invoke LOADMBA.
When the LOADMBA macro is invoked, the following registers must contain the
following values:
Register Contents
R4 Address of the MBA’s configuration register (MBA$L_CSR)
R5 Address of UCB
LOADMBA destroys the contents of R0 through R2.
2–45