PC87332VLJ-5 NSC [National Semiconductor], PC87332VLJ-5 Datasheet - Page 36

• Manufacturer Part Number: PC87332VLJ-5
• Description: PC87332VLJ (3.3V/5V) and PC87332VLJ-5 (5V) (SuperI/OTM III Premium Green) Floppy Disk Controller, Dual UARTs, IEEE1284 Parallel Port, and IDE Interfac
• Manufacturer: NSC [National Semiconductor]

4 0 FDC Command Set Description
Note 1 Sector Gap refers to the Intersector Gap Length parameter specified in the Command Phase of the Read Write Scan and Verify commands Although
Note 2 Format Gap is the suggested value to use in the Format Gap parameter of the Format command This is the programmable GAP3 as shown in Figure 4-1
Note 3 The 2 88M diskette media is a Barium Ferrite media intended for use in Perpendicular Recording drives at data rates up to 1 Mbps
250 kbps
MFM
500 kbps
MFM
360k
1 2M
720k
1 44M
2 88M (Note 3)
Mode
this is the recommended value the FDC treats this byte as a don’t care in the Read Write Scan and Verify commands
Media
Type
TABLE 4-2 Typical Format GAP3 Length Values Based on PC Compatible Diskette Media
(Decimal)
TABLE 4-1 Typical Format GAP3 Length Values based on Drive Data Rate
Sector
1024
2048
4096
1024
2048
4096
8192
Size
256
256
512
512
256
512
512
Decimal
Sector
Size
512
512
512
512
512
Sector
Code
(Hex)
01
01
02
02
03
04
05
01
02
02
03
04
05
06
Sector
Code
Hex
02
02
02
02
02
(Continued)
36
(Hex)
EOT
1A
12
10
08
09
04
02
01
0F
12
08
04
02
01
EOT
Hex
0F
09
09
12
24
(Hex) (Note 1)
Sector
Gap
0A
2A
2A
C8
C8
1B
1B
C8
C8
20
80
0E
35
99
Sector
Gap
Hex
2A
1B
1B
1B
1B
(Hex) (Note 2)
Format
GAP3
0C
FF
FF
6C
FF
FF
FF
32
50
50
F0
36
54
74
Format
GAP3
Hex
6C
50
54
50
53