-4
Expansion Floppy Disk Drives
The floppy disk drive,
which
can
be
expanded
is limited to
2 units 5.25” or 8” disk drives only.
D e t a i l s a r e a s
Drive A
System Floppy Disk Drive
two-sided double density)
D r i v e
System
Floppy Disk Drive
(5.25’ two-sided double density)
Drive C
Expansion
Floppy Disk Drive
(5.25’ two-sided double density)
Drive D
Expansion Floppy Disk Drive
(5.25” two-sided double density)
Drive
Expansion Floppy Disk Drive
(8’ one-sided single density)
Drive F xpan sion Floppy Disk Drive
o ne-sided single density)
Drive
Expansion Floppy Disk Drive
(8’ two-sided double density)
Drive
H xpan sion Floppy Disk Drive
t wo-sided double density)
The logical and physical corresponds
of
the above devices
are as follows.
<Logical
Address>
Note
Drive A
Drive B
Drive C
Drive D
Drive
Drive
F
Drive G
Drive H
<Physical Address>
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
'A'
and Drive ‘B’ are mounted on the system unit.
[11] -5 BIOS
The BIOS must be
changed
to implement the
on
the
Formula-l.
The
BIOS
made by our company supports the floppy
disk drive of 5.25” two-sided double density, 8’ two-sided
double density and 8” one-sided single density.
Refer to the
item No. <
Expansion Floppy Disk Drives for detail
allocation of the disk drives.
Be careful
of
the following points.
The Formula-l’s
files
are
compatible with the
files of 8’ one-sided single
density diskette.
However, there are no compatibility with the
files
o f
5.25” and 8” two-sided double density
d i s k e t t e s .
In case
of
copying the
files from the
double density diskette made by the other company, the user must
do
so after once copying to the
files of 8” one-sided
single density diskette.
See the item No. <
Device Allocation > about the device
of Console, Reader, Puncher
and Printer.
-6 File Format
The filing
format
of
the floppy disk drives being used
in the Formula-l is
on the
following page.
T h e e x p l a n a t i o n
o f
one-sided single density has been omitted.