FDC37M600 SMSC [SMSC Corporation], FDC37M600 Datasheet - Page 19
![no-image](/images/no-image-200.jpg)
FDC37M600
Manufacturer Part Number
FDC37M600
Description
ENHANCED SUPER I/O CONTROLLER WITH INFRARED SUPPORT
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.FDC37M600.pdf
(182 pages)
- Current page: 19 of 182
- Download datasheet (643Kb)
Normal Floppy Mode
Normal mode.
high impedance.
Enhanced Floppy Mode 2 (OS2)
Register 3F3 for Enhanced Floppy Mode 2 operation.
For this mode, MEDIA_ID[1:0] pins are gated
into bits 6 and 7 of the 3F3 register. These two
bits are not affected by a hard or soft reset.
BIT 7 MEDIA ID 1 READ ONLY (Pin 19) (See
Table 7)
BIT 6 MEDIA ID 0 READ ONLY (Pin 20) (See
Table 8)
BITS 5 and 4 Drive Type ID - These bits reflect
two of the bits of L0-CRF1. Which two bits
these are depends on the last drive selected in
the Digital Output Register (3F2). (See Table 9)
REG 3F3
REG 3F3
Pin 19
Input
0
1
Tri-state
Table 7 - Media ID1
Media
DB7
DB7
ID1
Register 3F3 contains only bits 0 and 1. When this register is read, bits 2-7 are a
L0-CRF1-B5
= 0
0
1
Tri-state
Media
DB6
DB6
MEDIA ID1
ID0
BIT 7
L0-CRF1-B5
Tri-state
DB5
DB5
Drive Type ID
= 1
1
0
Tri-state
DB4
DB4
19
Note:
BITS 3 and 2 Floppy Boot Drive - These bits
reflect the value of L0-CRF1. Bit 3 = L0-CRF1-
B7. Bit 2 = L0-CRF1-B6.
Bits
(READ/WRITE). Same as in Normal and
Enhanced Floppy Mode 1.
Tri-state
Floppy Boot Drive
Pin 20
DB3
DB3
Input
1
0
1
L0-CRF1-B5 = Logical Device 0,
Configuration Register F1, Bit 5
and
Table 8 - Media ID0
Tri-state
DB2
DB2
0
CRF1-B4
-
= 0
0
1
Tape
tape sel1 tape sel0
tape sel1 tape sel0
MEDIA ID0
DB1
DB1
BIT 6
Drive
CRF1-B4
= 1
1
0
DB0
DB0
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