HP Integral Personal Computer Service Manual page 14

DISC
DrIve
• 31!2-inch micro-floppy disc drive.
• Burst transfer rate: 62.SK-bytes
per
second.
• Encoding: Modified Frequency Modulation.
• Rotational speed: 600 revolutions
per
minute.
• Capacity:
709K-byt~.
• Bytes
per
sector: 512.
• Sectors per track: 9.
• Total tracks per surface: 80.
• Available tracks per surface: 77.
• Spare tracks per surface: 2.
• Wear track per surface: 1.
• Surfaces per disc: 2.
• Interleave factor: 1.
Disc .....
• Life:
3
x
10
6
passes per
track.
• Read errors: 1
per
10
9
bits read.
K.poa,..
• 90-key condensed ITF (Integrated Terminal Family) keyboard.
• Detachable, low profile (30 mm high).
• Adjustable tilt, 0 or 8 degrees.
• Modified HP-HIL (Hewlett-Packard Human Interface Unk) keyboard interface with two
HP-HIL
connectors .
......
• Frequency range: 100 to 5000 Hz.
1IHI-1'IIII. Clock
• Accuracy: maximum error, 120 seconds per month; typical, 30 seconds per month.
• Battery life: minimum expected, 6 years; typical, 12
years.
HP·18
Int."'.
• Maximum
transfer rate: 13SK-bytes
per
second (software limitations may reduce the rate).
• Conforms to IEEE-488 interface standard.