Product specifications

VT1211 LPC SuperIO and Hardware Monitor
Revision 1.0 January 8, 2002 -23- Register Descriptions – LDN 0 FDC
Technologies, Inc.
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Floppy Disk Controller Registers (LDN 0)
Offset 30 – Floppy Controller Activate...........................RW
7-1 Reserved ........................................ always reads 0
0 Floppy Disk Controller Enable.................. default = 0
Offset 60 – Floppy Controller Base Address (FCh).......RW
7-1 ADR9 ~ ADR3..................... always reads 1111 110b
0Mustbe0.............................................. default = 0
Offset 70 – FDC IRQ Select (06h) ...................................RW
7-4 Reserved .…................................... always reads 0
3-0 FDC Controller IRQ Number Select ... def = 0110b
Offset 74 – FDC DRQ Select (01h) ..................................RW
7-2 Reserved ........................................ always reads 0
1-0 FDC DRQ Number Select .................. default = 01b
Offset F0 – Floppy Controller Configuration................ RW
7 Reserved ….. ..................................always reads 0
6 Hardware Floppy Disk Drive on Parallel Port
0 Disable................................................... default
1 Enable (see parallel port pin descriptions)
5 Software Floppy Disk Drive on Parallel Port
0 Disable................................................... default
1 Enable
4 Three-Mode Floppy Disk Drive
0 Disable................................................... default
1 Enable
3 Floppy Controller IRQ Polarity
0 Positive.................................................. default
1 Negative
2 Two / Four Floppy Disk Drive Select
0 Internal 2 drive decoder......................... default
1 External 4 drive decoder
1 Floppy Disk Controller DMA
0 Burst .................................................... default
1 Non-burst
0 Floppy Disk Drive Swap
0 Disable................................................... default
1 Enable
Offset F1 – Floppy Disk Drive Type (00h) ..................... RW
7-6 FDD3 (DT1, DT0)….…….................... default = 00b
DRVDEN0
DRVDEN1
00 DENSEL DRATE 0
01 DRATE 1 DRATE 0
10 DENSEL# DRATE 0
11 DRATE 0 DRATE 1
5-4 FDD2 (DT1, DT0)….…….................... default = 00b
3-2 FDD1 (DT1, DT0)................................. default = 00b
1-0 FDD0 (DT1, DT0)................................. default = 00b