User`s guide
Vector
ZCB
Single
Board
canputer
2.3.4
2732
EPROM
Addressing
To
use
2732
1
s
in
the
ZCB,
follow
the
procedure
outlined
below.
1)
Oonsult
the
2732
Base
Address
Chart.
'
This
shows
the
base
addresses
allowable
with
2732
1
s.
2732 Base
Address
Chart
Addresses
Area
H
Jumpers
OOOOH-7FFFH
1-2-3,3-9
8000H-FFFFH
1-2-3,3-8
Area
I Jumpers
8-3,7-2,6-1
8-3,7-2,6-1
Area
J JllllJ?E:rs
3-4,1-7
3-4,1-7
2)
With
the
base
address
chosen,
jumper
areas
r
H
,
I
and
J
as
per
the
2732
chart
and
cut
away
the
old
jumpers.
3)
Subtract
the
base
address
fran
the
absolute
address
desired
to
find
the
relative
address.
Oonsult
the
4K
colunn
of
the
Relative
Address
Chart
to
find
the
appropriate
Area
F
pad
number.
4)
Consult
the
Area
F
EPRCM/RAM
Socket
Pad
Chart.
5)
Solder
jumper(s)
as
required
in
Area
F.
6)
Cut
away
any
pre-existing
jumpers
as
necessary.
:t-bte:
The
lK
of
on-board
RAM
will
now
occupy
4K
of
address
space.
The
first
lK
will
be
FOPulated,
the
renaining
3K,
blank.
2.3.5
Enable
on
board
EPIOI
on
t.:xJot
Jumper
area:
B
Oonnections
as
manufactured:
jumpered
Function:
Optionally
causes
processor
to
address
the
first
3
bytes
of
EPRCM
on
system
start
up
(boot)
or
reset.
Generally,
the
first
3
bytes
of
the
EPROM
are
a jump
instruction
to
the
fourth
byte
on
the
EPR(lIo1.
The
board
is
shipped
with
this
option
enabled.
Options:
to
disable
this
optioo,
cut
the
jumper
between
both
pads.
2-6
Rev.
l-B
6/11/80