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Bitfields for general drive configuration

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Offset Description

15

0 reserved for non-magnetic drives

14

format speed tolerance gap required

13

track offset option available

12

data strobe offset option available

11

rotational speed tolerance is > 0.5%

10

disk transfer rate > 10 Mbs

9

disk transfer rate > 5Mbs but <= 10Mbs

8

disk transfer rate <= 5Mbs

7

removable cartridge drive

6

fixed drive

5

spindle motor control option implemented

4

head switch time > 15 usec

3

not MFM encoded

2

soft sectored

1

hard sectored

0

reserved (0)