HP 900 Series - Inoperative Unit Procedure

The following I/O cards are identified by the Boot ROM, but are not tested:
• HP 98622 GPIO
• HP 98623 (BCD)
• DIO
bit-mapped video cards with a primary ID of 25 and secondary ID of 0 or 1
• HP 98638 RS-232 Card
• HP 98633 Multiprogrammer Interface
• HP 98640 (ACD)
•
HP 98641 RJE Card
• HP 98643 LAN Card
• HP 98653 EPRO~1 Programmer
• HP 98659 Bubble RAM Card
• HP 98691 RS-232 Card
• HP 98695 (3270 Emulator)
17. If the Boot ROM finds an external I/O card that it does not recognize, it will display the
message
IDXX at YY
where XX is the combined value of the card's primary and secondary IDs, and YY is the
card's select code.
18. Test RAM:
The message TESTING MEMORY is displayed on the last line of the display, and the rest of
menlory is tested. Parity errors are displayed as they occur, such as:
parity bit error at FFFF1234
19. Set Up Memory:
The Inessage SELF-TEST MODE is printed on the last line of the display. If a memory
failure occurred,
then the appropriate value is sent to the LEDs and following message is
displayed:
Memory Failed at <Hex-Address>
(W:<Hex-Write-Pattern>, R:<Hex-Read-Pattern»
After a failure the Boot ROM drops back to the next 64K byte boundary, unless the
failure was is in the top 64K, in which case the Boot ROM drops back to the next 2K
boundary.
The global Boot ROM variables are set up. Available RAM is displayed as
a base
ten number in bytes. The amount of RAM available should equal the amount of
RAM installed minus 164 bytes.
For
example if one HP 98258A RAM board with an HP 98258C add-on board, the anlolmt
of RAM displayed would be about 16777052 Bytes.
138 Boot ROM Functions