User`s guide

2.3 POWER-UP SELF-TEST
Upon initial power-up, the VAX-ll/730 console subsystem system goes through a sequence of events that
is shown in Figure 2-1. If the self-enable switch (SWl) on E47 of the WCS module (M8394 slot 3) is OFF
(high), the console microprocessor performs a test of the + 15 V and -15 V power and the PROM resident
self-test.
If SW 1 is ON (low) the PROM resident self-test is bypassed.
14- ____ FROM MICMON
(RETURN)
DISABLE SOS5A
INTERRUPTS
NEGATE CPU RUN
ASSERT UNIBUS:
AC LO,
DC LO,
CINIT, BBSY
ROM CHKSUM,
USARTS, RAM (LOOP
ON ERROR. POWER
DOWN/UP TO RE-
LEASE).
"CONVxxx"
INITIALIZE
SET UP PROG FLAGS,
USARTS,
AND STACK
POINTER.
EXECUTE
UNIBUS POWER-UP
SEQUENCE.
ENABLE
SOS5A INTERRUPTS
TRY TO READ BOOT
BLOCK FROM
001
(001 IS CURRENT
DRIVE)
LOAD BOOT BLOCK
FROM
CURRENT
DRIVE TO RAM
4100-4BFF
YES
NO
TRY TO READ BOOT
BLOCK FROM
000
(000 IS CURRENT
DRIVE)
NO
Figure 2-1 Power-Up Sequence of Events
2-5
TK-7989