C
ROM Partitioning
This section describes ROM partitioning and subroutine entry points that
are public and are guaranteed to be compatible over future versions of
the firmware. An entry point is the address at which any subroutine or
subprogram will start execution.
C.1 Firmware EPROM Layout
The KA681/KA691/KA692/KA694 has 512 Kbytes of FEPROM. Unlike previous
Q22–bus based processors, there is no duplicate decoding of the FEPROM
into halt-protected and halt-unprotected spaces. The entire FEPROM is halt-
protected. Figure C–1 illustrates the FEPROM layout for the KA681, KA691,
KA692, and KA694.
ROM Partitioning C–1