User`s guide
Vector
ZCB
Single
Board Canputer
2.3.1
2708
EPROM
Addressing
270S
type
EPROMs
are
the
easiest
type
of
PRCM
to
chose
•••
they
are
the
factory
standard
and
the
roard
is
prejumpered
to
use
them. The
standard
jumpering
of
the
ZCB
provides
for
the
Vector Graphic
4.0
Monitor
addressed
at
EOOOH.
The
board
is
prejumpered
to
use
270S's
at
the
following
memory
addresses:
PROM
1
U20
PR(lJI
2 021
PRCM
3
U22
RAM
U24,25
EOOOH-E3Fm
E400H-E7Fm
OCOOH-EFFm
FCOOH-FFFm
The
span
between
FOOOH
and
FBFFH
is
taken
up,
in
the
standard
Vector
System, by
the
Flashwriter
II
roard
and
the
Disk
Controller
board.
There
is
a lK gap
in
:rnem:::>ry
fran
ESOOH
to
EBFFH
if
standard
jumpering
is
used.
If
you
'want
to
change
EPROM/RAM
memory
addresses
within
the
memory
address
block
EOOOH
to
FFFFH,
use
the
following
procedure.
1)
Subtract
EOOOH
fran
the
desired
PRCM
or
RAM
base
address.
2)
Consult
the
lK colunn
of
the
Relative
Address
Chart
(below)
to
determine
the
jumper
area
F pad number which
corresponds
to
the
result
obtained
in
step
1.
3)
Consult
the
Area F
EPRCM/RAM
Socket
Pad
Chart
to
determine
the
pad number
of
the
particular
socket
you
wish
to
change.
4)
SOlder a jumper between
the
two
pads.
5)
CUt
away
any
pre-existing
jumpers
as
necessary.
Relative
Address Chart
Increment
lK
2K
Area F Pad
No.
(all
addresses
14 0000-03FF 0000-07FF
13 0400-07FF
OSOo-OFFF
12
OSOo-OBFF
100o-17FF
11
OCOo-OFFF
lSOO-lFFF
10 100o-13FF 200o-27FF
9 1400-17FF 2S0o-2FFF
S lSOo-lBFF 3000-37FF
7
lCOO-lFFF
3S0o-3FFF
Rev. I-a
6/11/80
4K
in
hex)
OOOo-OFFF
1000-lFFF
200o-2FFF
3000-3FFF
400o-4FFF
500o-5FFF
600o-6FFF
700o-7FFF
2-3