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VT8231 датащи(PDF) 55 Page - List of Unclassifed Manufacturers

номер детали VT8231
подробное описание детали  SOUTH BRIDGE PC99 COMPLIANT
PDF  132 Pages
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производитель  ETC [List of Unclassifed Manufacturers]
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VT8231 датащи(HTML) 55 Page - List of Unclassifed Manufacturers

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VT8231
Preliminary Revision 0.8 October 29, 1999
-49-
Register Descriptions - Super-I/O I/O Ports
7HFKQRORJLHV ,QF
:H &RQQHFW
:H &RQQHFW
Index F6 – Floppy Controller Configuration..................RW
7-6
Reserved
........................................ always reads 0
5
Floppy Drive On Parallel Port
0
Parallel Port (SPP) Mode .......................default
1
FDC Mode
This bit is used in notebook applications to allow
attachment of an external floppy drive using the
parallel port I/O connector:
SPP Mode
Pin Type
FDC Mode Pin Type
STROBE#
I/O
-
n/a
PD0
I/O
INDEX#
I
PD1
I/O
TRK00#
I
PD2
I/O
WRTPRT#
I
PD3
I/O
RDATA#
I
PD4
I/O
DSKCHG#
I
PD5
I/O
-
n/a
PD6
I/O
-
n/a
PD7
I/O
-
n/a
ACK#
I
DS1#
O
BUSY
I
MTR1#
O
PE
I
WDATA#
O
SLCT
I
WGATE#
O
AUTOFD#
I/O
DRVEN0
O
ERROR#
I
HDSEL#
O
PINIT#
I/O
DIR#
O
SLCTIN#
I/O
STEP#
O
43-Mode FDD
0
Disable ...................................................default
1Enable
3
Reserved
........................................ always reads 0
2
Four Floppy Drive Option
0
Internal 2-Drive Decoder .......................default
1
External 4-Drive Decoder
1
FDC DMA Non-Burst
0
Burst .....................................................default
1Non-Burst
0
FDC Swap
0
Disable ...................................................default
1Enable
Index F8 – Floppy Drive Control .................................... RW
7-6
Floppy Drive 3 (see table below)
5-4
Floppy Drive 2 (see table below)
3-2
Floppy Drive 1 (see table below)
1-0
Floppy Drive 0 (see table below)
DRVEN1
DRVEN0
00
DRATE0
DENSEL
01
DRATE0
DRATE1
10
DRATE0
DENSEL#
11
DRATE1
DRATE0



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