HP 330 Service Information Manual page 152

7. Boot ROM Checksum:
If the Boot ROM checksums successfully, then the Boot ROM version
(BOOTROM Rev. A2)
is displayed, otherwise the nlessage
BOOTROM Rev. A2 Failed
will be displayed. If there
was a video circuit memory failure discovered in the alpha display initialization and test
routine, then it will be shown on the display as:
Memory Failed at <Hex-Address>
(W:<Hex-Write-Pattern>, R:<Hex-Read-Pattern»
8. Identify Floating Point Hardware.
A search is made for the MC98881 Coprocessor. It is identified but not tested.
9. Initialize, and Test Keyboard Electronics:
The keyboard human interface vectors are set up for the processor's keyboard electronics,
if present, and their self-test value is checked. If the keyboard electronics failed self-test,
then
Keyboard Failed
is displayed and the appropriate error code is sent to the LEOs
and the beeper. If the processor's keyboard interface is present and passed self-test, then
the message
Keyboard
is displayed.
If no processor keyboard electronics are present, then the external I/O space is searched for
accessory card keyboard electronics (for the HP 98700A). If found, it is treated the same
as the processor keyboard electronics except that the message
Keyboard at 8
(where X
is the select code of the accessory card keyboard electronics) is displayed if the keyboard
passes self-test, and the message
Console Keyboard at XX Failed
is displayed if it fails
self-test.
NOTE
Note that only the I/O card keyboard electronics chosen as console
keyboard will be tested. Several seconds are required to identify the
console keyboard. Other keyboard electronics in I/O slots will be iden-
tified, but not tested.
10. The message
RESET to Power-Up
appears on the last line of the display.
11. Drop Interrupt Level:
The interrupt level is dropped to zero.
12. Pre-load Memory:
The message
LOADING MEMORY
appears on the last line of the display while the end of
memory is found by pre-loading the RAM not currently in use by the Boot ROM code.
If a long test is to be done, the RAM is loaded with EEEE 111116. If the fast test is to be
done, each RAM location is loaded with its own address. When pre-loading is finished,
the message
SELF-TEST MODE
is displayed on the last line of the display. Then, a 300
InS
delay is executed to catch refresh failures.
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Boot ROM Functions