HP 330 Service Information Manual page 155

20. Allocate Memory:
Ternporary me1TIOry is set up for the Boot scanner and Booter routines.
21. Display Final LED value:
If an error occurred during self-test, then the appropriate value will be sent to the LEDs
and sounded off on the beeper. The lower seven bits of LED value are sounded off (MSB
first) with ones represented by high frequency long notes and zeros represented by low
frequency short notes. If a Boot ROM checksum error has occurred, then the Boot ROM
willl stop execution with the message
CONTINUE AT OWN RISK (RETURN To Continue)
on the
bottom line of the display. The Boot RO M will continue if the I
Return
I key is pressed. If an
error has occurred and continuous self-test looping is not enabled, and the error was not
a Boot ROM checksum error, then the Boot ROM will wait one minute for the monitor
to warm up before continuing, and will display the message
WAITING 1 MINUTE (RETURN
To Abort Wai t).
Pressing the I
Return
I key will cause the Boot ROM to abort the one
minute wait and continue.
Copyright 1985,
Hewlett-Packard Company.
All Rights Reserved.
BOOTROM Rev. A2
MC68020 Processor
MC68881 Coprocessor
Bit Mapped Display
Keyboard Failed
HP-IB
HP98642 at 9 Failed
HP98629 at 20
Memory Failed at FFFC593200
(W:BBBB4444, R:BBBB4464)
196448 Bytes
WAITING 1 MINUTE (RETURN To Abort Wait)
RESET To Power-Up
Figure 4-5. Example Self-Test Error Display
Boot ROM Functions 139