82375EB Datasheet, PDF (38/131 Pages) Intel Corporation – PCI-EISA BRIDGE (PCEB)

82375EB SB
3 1 15 EADC1 EISA ADDRESS DECODE CONTROL 1 REGISTER
Address Offset
Default value
Attribute
Size
48 – 49h
0001h
Read Write
16 bits
This 16-bit register specifies EISA-to-PCI mapping of the 0-1 MByte memory address range For each bit
position the memory block is enabled if the corresponding bit^e1 and is disabled if the bit^e0 EISA or DMA
memory cycles to the enabled blocks result in the EISA cycle being forwarded to the PCI Bus For disabled
memory blocks the EISA memory cycle is not forwarded to the PCI Bus
Bit
Description
15 880–896 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
14 864–880 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
13 848–864 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
12 832–848 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
11 816–832 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
10 800–816 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
9 784–800 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
8 768–784 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
7 3 Reserved
2 640–768 KBytes VGA Memory Enable EISA-to-PCI mapping for this memory space is enabled
when this bit is 1 and disabled when this bit is 0
1 512–640 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this
bit is 1 and disabled when this bit is 0
0 0–512 KBytes Memory Enable EISA-to-PCI mapping for this memory space is enabled when this bit
is 1 and disabled when this bit is 0
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