Specifications

EPC-2 HARDWARE REFERENCE
ID Register (VID)
1 1 1 0 1 1 0 0 8140
1 0 0 1 1 1 1 1 8141
This register defines the EPC-2 as a message-based device that is mapped into the
A16/A32 address spaces with the manufacturer being RadiSys Corporation (manu-
facturer code 4076).
Since the EPC-2 is a DC device (a device without a static ULA, but a ULA that can be
assigned dynamically by the resource manager), an initial write into this register from
the VXIbus assigns a ULA to the EPC-2.
Device Type Register (VDT)
1 1 1 1 1 1 1 1 8142
0 1 1 1 0 0 0 S 8143
This read-only register denotes that the EPC-2 responds to a 16 MB range in the A32
space and has a model code of 255 (S=0) or 511 (S=1). S is controlled by the SLOT 0
FUNCTIONS parameter on the BIOS setup screen. S=0 (model code 255) means that
the EPC-2 is configured as a slot-0 controller.
Status/Control Register (VSC)
SRIE POSR SYSC 1 READY PASS NOSF RSTP 8144
SLE MODID SYSR 1 1 1 1 1 8145
This register contains VXI specified bits and EPC-2 device-dependent bits.
SLE Slave enable. If set (1), the EPC-2 will respond to certain A32 accesses from
the VXI data-transfer bus.
MODID If clear (0), it denotes that the EPC-2's MODID pin is being asserted.
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