Mark Pizzolato bcac7d0973 VAX: Change interval timers to pass boot ROM diagnostics. ...

Various boot ROM activities, including testing the Interval Timers, presume
that ROM based code execute instructions at 1 instruction per usec.
To accommodate this, we not only throttle memory accesses to ROM space,
but we also use instruction based delays when the interval timers are
programmed from the ROM for short duration delays.

2017-01-02 13:48:23 -08:00

66 KiB

Raw Blame History

View Raw