參數(shù)資料
型號: W83C554F
英文描述: W83C554F Highly Integrated System I/O Controller for Power PC TM (South Bridge) & UltraDMA/33 IDE Controller QFP 208
中文描述: W83C554F高度集成的系統(tǒng)的I / O控制器的Power PC商標(biāo)(南橋)
文件頁數(shù): 67/159頁
文件大小: 3991K
代理商: W83C554F
W83C553F
Electrical Specifications
WINBOND SYSTEMS LABORATORY
64
ISA ROM Address Decode Enable Register (default = 00h)
Function
:
When a bit is set to "1", memory accesses to the corresponding address range in the add-on BIOS area
are forward to the PCI bus.
Type
:
Read/Write
Bit Description
:
Bit 7:
MBEDC. Memory Block Enable; 880-896 KByte. (DC000-DFFFFh).
Bit 6:
MBED8. Memory Block Enable; 864-880 KByte. (D8000-CBFFFh).
Bit 5:
MBED4. Memory Block Enable; 848-864 KByte. (D4000-C7FFFh).
Bit 4:
MBED0. Memory Block Enable; 832-848 KByte. (D0000-C3FFFh).
Bit 3:
MBECC. Memory Block Enable; 816-832 KByte. (CC000-CFFFFh).
Bit 2:
MBEC8. Memory Block Enable; 800-816 KByte. (C8000-CBFFFh).
Bit 1:
MBEC4. Memory Block Enable; 784-800 KByte. (C4000-C7FFFh).
Bit 0:
MBEC0. Memory Block Enable; 768-784 KByte. (C0000-C3FFFh).
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