HP 330 Service Information Manual page 141

Once in Configure Mode, several options are displayed. One of the option keys must be pressed
within approximately 5 minutes of entering Configure Mode. Otherwise, the Boot ROM will
time-out and start power-up over again. Available options are:
• Force Long Memory Test
• Continuous Self-Test
• 50 Hz CRT
• 60 Hz CRT
Regardless of the option chosen, most of the self-test will be repeated. If the memory test has
already been completed and the extended self-test option is chosen, then the main memory test
portion of the self-test will be repeated, otherwise it will not.
Force Long Memory Test
If the [I] key is pressed, the self-test will be started over and the long memory test will be
executed. Long memory test is a marching/walking ones and zeros test taking about 5 seconds
per 1 Mbyte of RAM.
Otherwise, the default short memory test will be executed. The short memory test
IS
an
address/address complement test taking about 1 second per 1 Mbyte of RAM.
Continuous Self-Test
Pressing [1] causes the Boot ROM to continuously repeat the self-test portion of its code. This
is a toggle switch, so entering Configure Mode while already in Continuous Self-Test Mode, and
choosing the "U' option, will stop the continuous self-test and cause the Boot ROM to continue
normal operation.
While in Continuous Self-Test Mode, the Boot ROM will not wait, beep or stop for most failures,
but will just continue looping through self-test. However, the following failures will stop self-test
looping:
• CPU register failure:
In this case the Boot ROM stops with the display blanked and the value
8111) on the LEDs.
• Memory failure in the top 16K bytes:
In this case the Boot ROM stops with the display blanked and the value 8416 on the LEDs.
If a non-bit-mapped video board and monitor is connected, the message
NEED GOOD RAM
ABOVE FFFFCOOO
will be displayed on that monitor.
• Boot ROM checksum failure:
In this case the Boot ROM stops with the message
CONTINUE AT OWN RISK (Press RETURN
To Continue)
on the display, the value
8:316
and then beeps four low tones and two high
tones. Pressing
I
Return
I
will cause the Boot ROM to continue self-test looping.
Boot ROM Functions
125