8.9
Port 80
A header has been provided for monitoring data written to I/O Port 80. The PC BIOS writes
status bytes to Port 80 that indicate a boot progress status and/or highlight any faults found.
Data written to this port can be monitored using a Logic State Analyzer (LSA) or seven segment
hexadecimal displays. See Section A.5.11 for details of the connector used for this port.
After boot-up this port can be used to monitor other status bytes written to Port 80, which can be
useful for debug purposes.
8-20
VP 110/01x
Additional Local I/O Functions
Summary of Contents for VP 110/01 Series
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Page 60: ...This page has been left intentionally blank 7 6 VP 110 01x Memory ...
Page 88: ...This page has been left intentionally blank 9 8 VP 110 01x PC BIOS ...
Page 122: ...This page has been left intentionally blank 11 28 VP 110 01x VSA Mode Diagnostics ...
Page 150: ...This page has been left intentionally blank B 8 VP 110 01x Breakout Modules ...