82374EB Datasheet, PDF (110/208 Pages) Intel Corporation – SYSTEM COMPONENT (ESC)

82374EB 82374SB
Table 4 ESC I O Register Address Map (Continued)
Address
(Hex)
Address (Bit)
FEDC BA98 7654
3210
Type
Name
04FBH 0000 0100 1111 1011 R W Reserved
04FC 0000 0100 1111 1100 R W DMA CH7 Stop Register Bits 7 2
04FDh 0000 0100 1111 1101 R W DMA CH7 Stop Register Bits 15 8
04FEh 0000 0100 1111 0111 R W DMA CH7 Stop Register Bits 23 16
04FFh 0000 0100 1111 1111 R W Reserved
0C00h 0000 1100 0000 0000 R W Configuration RAM Page Register
0C80h 0000 1100 100 0000 RO System Board ID Byte Lane 1 Bits 7 0
0C81h 0000 1100 100 0001 RO System Board ID Byte Lane 2 Bits 15 8
0C82h 0000 1100 100 0010 RO System Board ID Byte Lane 3 Bits 23 16
0C83h 0000 1100 1000 0011 RO System Board ID Byte Lane 4 Bits 31 24
NOTES
1 Port 70h resides in the ESC in addition the lower 7 bits of Port 70h reside in Real Time Clock also
2 Bit 3 of ports 372h and 3F2h reside in the ESC while the other bits reside on the ISA bus
Block
DMA
DMA
DMA
DMA
DMA
Conf
Board ID
Board ID
Board ID
Board ID
4 3 Configuration Addresses
ESC configuration registers are accessed through I O registers 22h and 23h These I O registers are used as
index address register (22h) and index data register (23h) The index address register is used to write the
configuration register address The data (configuration register address) in register 22h is used to decode a
configuration register The selected configuration register can be read or written to by performing a read or a
write operation to the index data register at I O address 23h
Configuration
Offset
00 – 01h
02h
03 – 07h
08h
09 – 3Fh
Table 5 Configuration Register Index Address
Abbreviation
Register Name
ESCID
RID
Reserved
ESC ID
Reserved
Revision ID
Reserved
110