HP 330 Service Information Manual page 144

The Boot ROM chooses the output devices in the manner shown in Figure 4-3.
Is there a
yes
=1
Choose
code
I
remote card?
the one with the lowest select
no
,Ir
Is there an
internal bit
yes
J
console
I
mapped display
"1
Choose it as
controller?
no
,Ir
Is there a
compatability
yes :i
Choose
console]
display
it as
controller?
no
' .
Is there an
HP98627 color
yes 9
Choose console
I
display
it as
controller?
no
,~
I
No output device present
I
,Ir
rUse dummy display drivers
I
Figure 4-3 Boot ROM Output Device Selection Flow Chart
128 Boot ROM Functions