HP 300

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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