VT82C596 datasheet(51/96 Pages) ETC

51 / 96 page

VT82C596B

Revision 0.3 June 17, 1999

-45-

PCI Function 0 Registers - PCI-to-ISA Bridge

7HFKQRORJLHV ,QF

:H &RQQHFW

Offset 83 – ISA Positive Decoding Control 3 ..................RW

COM Port B Positive Decoding

Disable ...................................................default

1Enable

6-4

COM-Port B Decode Range

000 3F8h-3FFh

(COM1) ............................default

001 2F8h-2FFh

(COM2)

010 220h-227h

011 228h-22Fh

100 238h-23Fh

101 2E8h-2EFh (COM4)

110 338h-33Fh

111 3E8h-3EFh (COM3)

COM Port A Positive Decoding

Disable ...................................................default

1Enable

2-0

COM-Port A Decode Range

000 3F8h-3FFh

(COM1) ............................default

001 2F8h-2FFh

(COM2)

010 220h-227h

011 228h-22Fh

100 238h-23Fh

101 2E8h-2EFh (COM4)

110 338h-33Fh

111 3E8h-3EFh (COM3)

Offset 84 – ISA Positive Decoding Control 4.................. RW

7-4

Reserved

........................................ always reads 0

FDC Decoding Range

Primary .................................................. default

Secondary

Sound Blaster Positive Decoding

Disable................................................... default

1Enable

1-0

Sound Blaster Decode Range

00 220h-22Fh, 230h-233h .......................... default

01 240h-24Fh, 250h-253h

10 260h-26Fh, 270h-273h

11 280h-28Fh, 290h-293h

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