Boot Rom Self-Tests - HP 330 Service Handbook

In the above example, FFB is 1111111110(01) in binary. A RAM board
with switches set to 1111 1111 10 has its top address as FFBFFFFF.
FFB3A900 is below FFBFFFFF and above FF7FFFFF (next 4 Mbyte
RAM block down). Therefore, the switches on the defective RAM board
would be set to 1111 1111 10.
Boot ROM 8elf-Tests
Table 4-3. LED State Codes In Numerical Order
LEDs Test Activity
0000 0000
No failure
0000 000.
LED ripple (all on, then off in sequence from MSB)
0000 00.0
Resetting I/O
0000 00 • •
Checksumming Boot ROM (or LED ripple)
0000 0.00
Testing top RAM (or maybe the Boot ROM checksum failed)
0000 0 • • 0
Searching for boot extension ROMs
0000 0 • • •
Starting test vector list (or LED ripple)
0000 .000
Preloading RAM
0000 . 0 0 .
Testing RAM
0000 • • 0.
Checksumming ROM operating systems
0000 • • • •
LED ripple
000. 00.0
Testing internal keyboard (or an interrupt line is stuck)
000. 0.00
Testing external key board
000. 0 • • 0
Testing internal HP-IB
000 • • 000
Testing DMA
000 • • • 0 .
Checksumming ID /INIT ROM on bit-mapped video board
000 • • • • 0
Testing alpha video board
000 • • • • •
Testing graphics on alpha/graphics (or LED ripple)
00.0 0000
Testing I/O card on select code 0
through
through
00 • • • • • •
Testing I/O card on select code 31, or LED ripple
44 Troubleshooting