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VT8235 датащи(PDF) 76 Page - VIA Technologies, Inc.

номер детали VT8235
подробное описание детали  V-LINK CLIENT HIGHLY INTEGRATED SOUTH BRIDGE
PDF  145 Pages
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производитель  VIA [VIA Technologies, Inc.]
домашняя страница  https://www.viatech.com/en/
Logo VIA - VIA Technologies, Inc.

VT8235 датащи(HTML) 76 Page - VIA Technologies, Inc.

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VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002
-70-
Device 17 Function 0 Bus Control Registers
Urpu‚y‚tvr†ÃDp
XrÃ8‚rp‡
ISA Decoding Control
Offset 6C – ISA Positive Decoding Control 1..................RW
7
On-Board I/O (Ports 00-FFh) Positive Decoding
0
Disable .................................................. default
1
Enable
6
Microsoft-Sound
System
I/O
Port
Positive
Decoding
0
Disable .................................................. default
1
Enable (bits 5-4 determine the decode range)
5-4
Microsoft Sound System I/O Decode Range
00 0530h-0537h ......................................... default
01 0604h-060Bh
10 0E80-0E87h
11 0F40h-0F47h
3
Internal APIC Positive Decoding
0
Disable .................................................. default
1
Enable
2
BIOS ROM Positive Decoding
0
Disable .................................................. default
1
Enable
1
Internal PCS1# Positive Decoding
0
Disable .................................................. default
1
Enable
0
Internal PCS0# Positive Decoding
0
Disable .................................................. default
1
Enable
Offset 6D – ISA Positive Decoding Control 2..................RW
7
FDC Positive Decoding
0
Disable .................................................. default
1
Enable
6
LPT Positive Decoding
0
Disable .................................................. default
1
Enable
5-4
LPT Decode Range
00 3BCh-3BFh, 7BCh-7BEh...................... default
01 378h-37Fh, 778h-77Ah
10 278h-27Fh, 678h-67Ah
11 -reserved-
3
Game Port Positive Decoding
0
Disable .................................................. default
1
Enable
2
MIDI Positive Decoding
0
Disable .................................................. default
1
Enable
1-0
MIDI Decode Range
00 300-303h ............................................... default
01 310-313h
10 320-323h
11 330-333h
Offset 6E – ISA Positive Decoding Control 3 ................. RW
7
COM Port B Positive Decoding
0
Disable ................................................... default
1
Enable
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)
3
COM Port A Positive Decoding
0
Disable ................................................... default
1
Enable
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 6F – ISA Positive Decoding Control 4 ................. RW
7-6
Reserved
........................................always reads 0
5
PCS2# and PCS3# Positive Decoding
0
Disable ................................................... default
1
Enable
4
I/O Port 0CF9h Positive Decoding
0
Disable ................................................... default
1
Enable
3
FDC Decoding Range
0
Primary .................................................. default
1
Secondary
2
Sound Blaster Positive Decoding
0
Disable ................................................... default
1
Enable
1-0
Sound Blaster Decode Range
00 220-233h................................................ default
01 240-253h
10 260-273h
11 280-293h



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