D765 데이터 시트보기 (PDF) - NEC => Renesas Technology

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D765

Single/Double Density Floppy-Disk Controller

NEC => Renesas Technology 

Table 4. Instruction Set (Notes

Phase

code

Scan or

Command

MT MF SK 1 1 0 0 1

X X X X X HD US,

C

H

N

EOT

GPL

STP

Result

R

Scan High Equal

Command

W

w

w

w

W

W

W

W

w

Execution

Result

R

ST1

ST2

C

R-

N

MT MF SK 1 1

XXXXX

C

10

US,

N

EDT

GPL

STP

ST1

ST2

C

H

R-

Command codes

Sector ID

Remarks

to command

Data comoared between the FDD and

Status

after command execution

Sector ID Information after command

Command codes

Sector ID information prior to command execution

Data compared between the FDD and

Status Information after command

system

Sector ID information after command

Command

W

W

Sense Interrupt Status

Command

w

Result

Specify

Command

W

W

W

Sense Drive Status

Command

W

W

Result

o

0

0

D

1

1

xxxxx0

Command codes

Head retracted to track 0

0

0

0

0

1

0

0

0

Command codes

Status Information about the FDC at the end of seek

PCN

0

00

0

0

0

1

1

Command codes

SRT

HUT

HLT

ND

0000D

00

X X X X X HD US,

ST3

Command codes

Status

about FDD

5-17

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