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82374EB Datasheet(PDF) 185 Page - Intel Corporation

Part # 82374EB
Description  SYSTEM COMPONENT (ESC)
PDF  208 Pages
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

82374EB Datasheet(HTML) 185 Page - Intel Corporation

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82374EB82374SB
Table 38 Encoded Chip Select Decode
ESC2
ESC1
ESC0
PERIPHERAL CS
0
0
0
COMACS
0
0
1
COMBCS
0
1
0
LPTCS
0
1
1
IDECS0
1
0
0
IDECS1
1
0
1
GPCS0
1
1
0
GPCS1
1
1
1
idle state
NOTE
Refer to Section 45 for the address decode of the peripheral chip selects
129 X-Bus Control And General Purpose Decode
The X-Bus is a secondary data bus buffered from the EISA Bus The X-Bus is used to interface with peripheral
devices that do not require a high speed interface Typically a discrete buffer device like a F245 is used to
buffer the EISA Bus from the X-Bus The ESC provides two control signals XBUSTR
and XBUSOE
for
the discrete F245 buffer
NOTE
The ESC directly supports X-Bus floppy disk controller and X-Bus IDE hard disk controller If IDE
resides elsewhere (eg
ISA Bus or PCI Bus) additional hardware is required to support the X-Bus
floppy The additional hardware is used to modify the X-Bus control signals Figure 31 shows the logic
needed to support an X-Bus floppy disk with IDE on the ISA or PCI bus
290476 – D9
Figure 31
185



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