HP 9000 Series 300

Diagnostics
5
Boot ROM Self Test Sequence
Test LED display Hex equivalent
CPU test
1
....
FF
Top 16K RAM test
2
0000 0.00
04
CPU timer test 3
0000 0.0.
05
Alpha display controller
test (if present)
000 • ••• 0
IE
Bit-mapped display
controller
test
000. •• 0.
lD
Local keyboard test
000. 00.0
12
or
Accessory keyboard
test 4
000. 00 ••
13
Boot ROM checksum test
0000
00 ••
03
Graphics display
controller
test
000.
••••
IF
Internal HP-IB test
000.
0.00
14
DMA test
000 • • 000
18
I/O card test
oo.X
XXXX 20 to 3F
ROM checksum test
0000 •• 0.
OD
RAM test
0000 .00.
09
1 Self test stops here and displays. 0 0 0 000. (81 hexadecimal) on the LEDs if the CPU fails its test.
2 Self test stops here and displays 0.00 0.00 (44 hexadecimal) or .000 0.00 (84) on the LEDs unless functional RAM
is present in the top 16K bytes of RAM space.
3 Self test stops here and displays 0000 0.0. (05 hexadecimal) on the LEDs if the CPU board timer fails its test.
4 IT more than one accessory keyboards are present, only the one with the lowest select code will be checked.
Diagnostics 29