HP 9000 Series Service Manual page 108

Troubleshooting
EISA Address Space:
The system memory address space set aside for EISA is permanently assigned to each
EISA location, even if no EISA assembly is present on the EISA converter. The
assignment is as follows:
EISA Converter $FC00 0000 to $FC00 0FFF
EISA Slot 1 $FC00 1000 to $FC00 1FFF
EISA Slot 2 $FC00 2000 to $FC00 2FFF
EISA Slot 3 $FC00 3000 to $FC00 3FFF
EISA Slot 4 $FC00 4000 to $FC00 4FFF
EISA Slot 5 $FC00 5000 to $FC00 5FFF
EISA Slot 6 $FC00 6000 to $FC00 6FFF
EISA Slot 7 $FC00 7000 to $FC00 7FFF
EISA Slot 8 $FC00 8000 to $FC00 8FFF
The EISA converter can manage up to 15 ($F) slot positions; however, this
NOTE
system only supports a maximum of 8.
This range is equivalent to the EISA I/O space which is internally defined in the EISA
converter to be a range of $0000 to $FFFF. The EISA internal memory space can define a
full 32 bit address range and would generally be used for inter-device communication by
EISA bus masters. EISA slave devices can also use EISA memory space but only to a
maximum of $03BF FFFF.
An EISA master device is one which can initiate communication with the host system. In
the case of the HP 9000 D Class Enterprise server, only the EISA LAN can perform this
function. EISA masters access system memory through an address mapper associated to
the EISA converter. An EISA slave is any device with which a host can initiate a DMA
transaction. An EISA master can also be a slave.
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