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Installation
and
Specifications
JUMPER OPTIONS
The 7706
has several
optional functions
which
are
select-
able
by
wire
jumpers
or wire
wrap
posts.
The
wirewrap
posts
can be
connected
by wirewrap
or
shorting plugs. Figure 2-5
shows
the locations
and
functions
of
these
jumpers and
posts.
lumpers W2,
W3, W4, and
W5
are
wirewrap
posts,
lump-
ers
W2
and
W5
come
with
shorting
plugs
of
the type
listed
under
the
"Connector" heading
of Fig.
2-6.
This type
of
con-
nector
is
short
enough
to
allow
the
card
to
occupy one
W
card
slot.
'The
jumpers
in
jumper
block
Wl
are soldered
in
wire
jumpers.
The
number
of
jumpers
installed
in
the
jumper
block
depends on
the
amount
of
memory
supplied
on
the
version
of
the
7706
you
may
have.
These jumpers can be
disconnected simply
by
cutting
them.
Be
sure
to
cut
them
m
two
places
to
prevent
them
from
reshorting. To
replace
a
jumper,
cut
in half
and remove one
half
at
a
time.
Remove
any
excess
solder
and
install
new
jumpers
as
needed.
Be
sure
the
nonconductive
protective
backing
is
replaced.
Spare pads
can be
ordered
from
Pro-Log
under
Pari
number
107100.
If
there
is
a
need
to
frequently
change
these
j
umpers
(e.g.
in prototyping),
you
may
want
to
replace these wire
jumpers
with
wirewrap
posts,
like
those
used
for
the other
jumpers.
Figure 2-6 provides a
list
of
parts
numbers
for
both
the
wire
wrap
posts
and
the shorting plug.
BATTERY
16K
VERSION
I
(CASEIS*)
JUMPER
DESCRIPTION
COMMENTS
W1
Chip Disables
Remove
jumper
to
disable
part
1
5-1
6 =
RAM
R
1-2
-RAM
7.
W2
Momex
Polarity
Jumper
installed
=
MEMEX
low-level active
W3
Segment
Select
Polarity
W4
Memory
Mapping
Selects
one
of
four
1
6K
Quadrants,
see
Pg.2-6,
loo
ooooj.il
[oooo
oo 4*
|
lODOOOOO.j
[0000000*]
4K
VERSION
2K
VERSION
*>t*-no
jumper
installed
as shipped
\\-
jumper
installed as shipped
Vindicates
pin
i
Figure
2-5.
7706
Jumper
Locations
and Functions
2-4
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