HP 9000 Series 310 Service Information Manual page 80

present
all on to
not power-up
70
Boot Rom Functions
Table 4-1. Power-Up Flow Chart
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Oetermlne If on alpha video cord Is present.
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If one Is present, then Initialize, and blank It.
r r::;;-;';:-~;-;:;'::-:;--;;~I-_:f~a~lIe~d~-JJ
If on alpha video
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Test top 16K bytes of RAM
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-lcard Is present,
display, "RAM FAILED
ABOVE FFCOOO"
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Clear RAM monitor flog
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1
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Stop with LEOs-a4,.1
L------"--eoI cord Is present,
missing Jlf on alpha video
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1
display, "RAM GONE
ABOVE FFCOOO"
1
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Stop with LEOS-44,.1
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Re-entry from configure mOdel
1
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set-up modifiable data and code structures:
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• Self-test vectors • Boot scanner list vectors
• Human Interface vectors • Moss storage vectors
l
Search ROM space for boot extension ROMs. Call any that pass checksum.
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Go thru self-test vectors (see next flowchart)
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Self test loop?
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yes
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Jump to RESET
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Boot scanner
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