Specifications
•
Two
Independent
NOVRAM
drives: -- U15 as a bootable NOVRAM cartridge drive,
and U26 as a second NOVRAM cartridge
drive
(each drive up to
512K
bytes).
• One
COIDbined
NOVRAM
drive:
--
U15
plus
U26
combined to form a single boatable
NOVIt.A..M
Gartridge
drive (up to 1 megabyte in eapacity).
Byt.Wlde
Socket Configuration
If
the
U15 or U26 memory sockets are
used,
they must be confIgured by means of jumpers
for device
type,
size,
and
the
starting memory address desired. The supported memory de-
vices
and corresponding jumper settings are
shown
in Tables
2-5
and Table
2-6.
The starting
address for
U15
is
FOOOOh,
regardless of
device
type or
size,
while
U26
can
be
set to start at
several addresses.
SIZE
(BYTES)
8K
8K
8K
16K
321C
321C
64K
128K
8K
32K
32K
32K
to
512K
OK
Table
H.
U26
Device Jumperlng
DEVICE
TYPE
TYPICAL
ADDRESS
W35
W36
W37
DEVICE
Norma
l
EPROM
2764
EOOOOh
open short
short
Normal
EPROM
2764
ESOOOh
short short
open
Norma
l
EPROM
2764
EEOOOh
open
short
open
Normal
EPROM
27128
ECOOOh
short
open open
Norma
l
EPROM
27256
EOOOOh
open short short
Norma
l
EPROM
27256
ESOOOh
short
open short
Norma
l
EPROM
27512
EOOOOh
short short
short
Page-8Cildr
EPROM
27011
EOOOOh
open short
short
28-Pin
SRAM
6264
EEOOOh
open short open
28-Pin
SRAM
62256
EOOOOh
open short short
28-Pin
SRAM
62256
ESOOOh
short
open short
NOVRAM
cartridge
DS1217x
EOOOOh
open short short
None
-----
...
----
open
open
open
Note
When a byte-wide memory device is enabled, its memory
address
space is unavailable for use by other devices on
the
PC
bus. A
byte-wide
socket must
be
marked as "disa-
bled"
(jumpers
W3S-W38,
w4f
"open")
before its memory
space can
be
used for other purposes.
2-8
W38
W45
open
open
open
1/3
open
1/3
1/2
113
1/2 1/3
1/2
113
1/2 3/5
2/3 2/4
2/3
open
2/3 4/6
2/3 4/6
213
4/6
open open