0-7
This
set
of
jumpers
is
used
to
change
the
DMAF2's
addressing
i
1K
byte
segments.
The
jumper
should
normally
be
left
in
the
position.
IRQ/NORM
When
in
the
NORM
position
no
interrupts
generated
by
the
DMAF2
will
be
passed
to
the
computer
system.
This
jumper
when
in
the
IRQ position
will
enable
interrupts.
The
jumper
should
normally
be
in
the
NORM
position.
n
4
32K/56K
UPPER/LOWER
0-7
PHYSICAL
DMAF2
——
~~
ADDRESSRANGE
32
L
0
~~
8000-81FF
32
U
0
8200-83FF
32
L
1
8400-85FF
32
U
1
8600-87FF
32
L
2
8800-89FF
32
U
2
8A00-8BFF
32
L
3
8C00-8DFF
32
U
3
8E00-8FFF
32,
L
4
9000-9
1FF
32.
U
4
9200-93FF
32
L
5
9400-95FF
32
U
5
9600-97FF
32
L
6
9800-99FF
32
U
6
9A00-9BFF
32
L
7
9C00-9DFF
32
U
7
9E00-9FFF
56
L
0
EQ00-E1FF
56
U
0
E200-E3FF
56
L
1
E400-E5FF
56
U
1
E600-E7FF
56
L
2
E800-E9FF
56
U
2
EAQO-EBFF
56
L
3
ECOO-EDFF
56
U
3
EEOO-EFFF
56
L
4
FOO0-F
1FF
56
U
4
F200-F
3FF
56.
L
5
F400-F5FF
56
U
5
F600-F
7FF
56
L
6
F800-F
OFF
56
U
6
FAOO-FBFF
56
L
7
FCOO-FDFF
56
U-
7
FEOO-FFFF
DESEL/SEL
With
this
jumper
in
the
SEL
position,
additonal
addresses
on
lines
A16
-
Al9
will
be
output
on
the
bus
during
DMA
transfers.
This
jumper
should
be
in
the
SEL
position
only
in
6809
systems
utilizing
memory
boards
that
use
the
Al6
-
A19
address
lines
such
as
the
S/09
system.
-
14
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