Rainbow Electronics DS3134 - Manual (Page 157)

DS3134
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Register Name: PVID1
Register Description: PCI Vendor ID / Device ID Register 1
Register Address:
0x100
lsb
Vendor ID (Read Only / set to EAh)
Vendor ID (Read Only / set to 13h)
Device ID (Read Only / set to 34h)
msb
DeviceID (Read Only / set to 31h)
Bits 0 to 15 / Vendor ID. These read only bits identify Dallas Semiconductor as the manufacturer of the
device. The Vendor ID was assigned by the PCI Special Interest Group and is fixed at 13EAh.
Bits 16 to 31 / Device ID. These read only bits identify the DS3134 as the device being used. The
Device ID was assigned by Dallas Semiconductor and is fixed at 3134h.
Register Name: PCMD1
Register Description: PCI Command / Status Register 1
Register Address:
0x104
lsb
STEPC PARC VGA MWEN SCC MASC MSC IOC
Reserved (Read Only / set to all zeros) FBBEN PSEC
FBBCT UDF 66 MHz Reserved (Read Only / set to all zeros)
msb
PPE PSE MABT TABTM TABT DTS1 DTS0 PARR
Read only bits in the PCMD1 register are indicated above by being underlined. All other bits are read-
write.
The lower word (bits 0 to 15) of the PCMD1 register is the Command portion and is used for control of
the PCI bus. When all bits in the lower word are set to zero, then the device is logically disconnected
from the bus for all accesses except for accesses to the configuration registers. The upper word (bits 16 to
31) is the Status portion and it is used for status information. Reads to the Status portion behave normally
but writes are unique in that bits can be reset (i.e. forced to zero) but not set (i.e. forced to one). A bit in
the Status portion will be reset when a one is written to that bit position. Bit positions that have a zero
written to them will not be reset.