28
The
VIC
20
User
Guide
TAlu1·3.
1540
Disk
Drive
Specifications
Storage
Total capacity
Sequential
Relative
Directory entries
Sectors per track
Bytes
per
sector
Tracks
Blocks
Ie's:
6502
6522 (2)
Buffer
2114 (4)
Physical:
Dimensions
Height
Width
Depth
Electrical:
Power requirements
Voltage
Frequency
Power
Media:
Diskettes
174,848 bytes
per
diskette
168,656 bytes
per
diskette
167,132 bytes
per
diskette
65,535 records
per
file
144
per diskette
17
to
21
256
35
683 (664 blocks free)
microprocessor
1/0,
interval timers
2KRAM
97mm
200mm
374mm
100, 120,220,
or
240 VAC
50
or
60 Hz
25
Watts
Standard
mini 5-1/4", single-sided,
single-density
L-
________________________________________________________
~
Indicator Ughts
The 1540 disk drive has two indicator lights
on
its front panel. The
green one will glow when power
is
applied
to
the unit. The red one
is
the disk
activity indicator. It will glow when the drive is running,
and
flash
ifthere
is
an
error condition.
loading
and
Unloading Diskettes
Figure
1-11
illustrates the various parts
of
a floppy diskette. The
magnetic surface itself
is
a disk made
of
a thin, flexible plastic similar to the
material used in cassette tapes. This fragile disk
is
enclosed in a protective
jacket. The jacket
is
then placed in an envelope
that
protects the read / write
slot.
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