FUJITSU MCM3064AP - Manual (Page 124)

Host Interface
4-54 C156-E227-01EN
"Number of Heads, Sectors per Track and Number of Cylinders" define logical
value. It does not show physical numbers. No guarantee for logical compatibility
of media when device driver or application is used this value.
"Data Bytes per Sectors" defines Block Length (200h or 800h).
"Motor off Delay" defines time for spinning down operation. X'FF' is to does not
stop motor forever.
"Medium Rotation Rate" defines revolutions per minute.
Table 4.58 Changeable values in flexible disk page
Bit
Byte
7 6 5 4 3 2 1 0
2-3 0000h
4 00h
5 00h
6-7 00h
8-9 0000h
10-19 0000h
20 00h
21-27 00h
28-29 0000h
30-31 00h