Sun Microsystems SPARCstation 5 Model 110 Service Manual page 26

Power-on switch
POST Phase
FIGURE 2-1
If you need to run extended FORTH Diagnostics to take advantage of more extensive
tests, see Appendix D.
2-2 SPARCstation 5 Model 110 Service Manual • November 1996
Stop
Yes
key
Keyboard
pressed?
attached
?
Yes—Skip POST
No
Factory-Defined Boot Sequence—POST Phase Settings and Tests
No
Stop-d
No
keys
pressed?
Yes—Set
diag-switch? to true
Display errors on
keyboard LEDs
and console
OpenBoot PROM firmware takes control
false (default)
diag-
switch?
true
Low-level diagnostic:
POST phase
No
POST
passed
Yes