HP 330 Service Information Manual page 153

13. Test and Initialize Graphics on Alpha/Graphics Card.
If an HP 98546A is present, then it is tested with a byte-wide RAM test. If the graphics
test is passed, then the message Graphics is displayed. If the graphics test is failed, then
the message Graphics Failed is displayed and the appropriate value is sent to the LEDs.
If there is a graphics memory failure, it is shown on the display as following two lines:
Memory Failed at <Hex-Address>
(W:<Hex-Write-Pattern> , R:<Hex-Read-Pattern»
Finally, graphies memory is cleared.
14. Test HP-IB:
If the processor has HP-IB and it is the system controller then the Boot ROM will test
it. If the HP-IB hardware fails the test, then the message HP-IB Failed is displayed and
the appropriate value is sent to the LEDs. If the HP-IB hardware is present and had no
failures, then HP- IB is displayed.
15. Check For DMA Presence:
When the DMA chip on the system interface board is found, the message DMA-CO is
displayed. C is the class and 0 is the revision. No testing of the DMA chip or circuits is
done.
16. I/O Card Tests:
Select eodes 0 through 31 are scanned by the Boot ROM. For each select code the following
steps are taken:
a. The appropriate value is sent to the LEDs indicating which select code is being
examined.
b. If one of the following cards is found at the current select code, it will be tested by
the Boot ROM:
• HP 98629 SRM Controller card
• HP 98627 Color Card
• HP 98625A/B HP-IB Card
• HP 98626 RS-232 Interface Card
• HP 98644 RS-232 Interface Card, or
• HP 98642 4-port Multiplexed RS-232 Interface Card
If the card at the current select code has no failures, then the message HP98XXX
is displayed for that card. If the card fails, then the message HP98XXX Failed is
displayed for that card and the appropriate value is displayed on the LEDs. A
memory failure on the HP 98627 Color Output Card is indicated by the message:
Memory Failure at <Hex-Address>
(W:<Hex-Write-Pattern>, R:<Hex-Read-Pattern»
Boot ROM Functions
137