PC97338 datasheet(119/221 Pages) NSC

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TABLE 61. VERIFY Command Termination Con-

ditions

3.6.23 The VERSION Command

The VERSION command returns the version number

of the current Floppy Disk Controller (FDC).

Command Phase

Execution Phase

None.

Result Phase

The result phase byte returns a value of 90 (hex) for

an FDC that is compatible with the 82077.

Other controllers, i.e., the DP8473 and other NEC765

compatible controllers, return a value of 80 hex (in-

valid command).

MT EC

Sector Count (SC) or

End of Track (EOT) Value

Termination

Status

SC should be FF (hex)

EOT

≤ Sectors per Sidea

a. The number of formatted sectors per side of the

disk.

No Errors

SC should be FF (hex)

EOT > Sectors per Side

Abnormal

Termination

≤ Sectors per Side

and

≤ EOT

No Errors

SC > Sectors Remaining

SC > EOT

b. The number of formatted sectors left, which can

be read, including side 1 of the disk if MT is 1.

Abnormal

Termination

SC should be FF (hex)

EOT

≤ Sectors per Side

No Errors

SC should be FF (hex)

EOT > Sectors per Side

Abnormal

Termination

≤ Sectors per Side

and

≤ EOT

No Errors

≤ (EOT x 2)

and

EOT

≤ Sectors per Side

No Errors

SC > (EOT x 2)

Abnormal

Termination

7654

3210

0001

0000

7654

3210

1001

0000

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