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Table 4-1. Power-Up Flow Chart (Continued)
oot ROM .elf-te.t vectors
'etermlne
proce •• or type
,ltlal1ze and te.t Proce •• or board timer
:heck for presence of a RAM
monitor
I on alpha video cord I. pre.ent, te.t
It.
I a bit mopped video boord I. pre.ent,
:heck.um
It. ID/INIT
ROM.
falled--1 Stop with
as,.
on
LED.
I
iet-up display portion of the
human Interface.
:hecksum the boot ROM.
)Isploy proces.or type.
_ook for floating
point hardware and display type If found.
s Intemal
KBD
electronics pre.ent?
I - - - - " - - - . j
t-"-ye_s _ _
+lJ
Test and enable
I
Is there an external KBD electronics present
J
"I
external KBD electronics.
I
!no
1
Enable any remote keyboard.
I
1
Set-up input portion of the human interface-J
!
Drop interrupt level to zero.
I
1
Pre-load the rest of memory.
Wait 300 ma for RAM refresh.
I
!
Test and clear any 98204 graphics memory.
I
1
Walt another 200 ms for RAM refresh.
I
!
Test internal HP-IB if present.
I
1
Check for DMA card presence.
J
!
Look for
I/o
cards on select codes 0 thru 31
I
Allow a card at select code 7 to be used if no
internal HP-IB.
1
Test any of the following cards if found:
HP98627
HP98644
HP98629
HP98628
HP98624
HP98642
HP98626
Boot Rom Functions
71
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Table of Contents
Troubleshooting
