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Philips CD-I - Page 96

Philips CD-I
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Pin
lay-out
extension
slot
99 97 95
93
5 3 1
100 98 96 94
6 4 2
1.6.
RAM
extension
board
This
RAM
is
only
used
as
the
extension
of
the
system
RAM.
The
capacity
is
1
MB.
1.7.
SCSI
interface
extension
board
The
main
purpose
of
the
SCSI
interface
board
is
to
connect
a
hard
disc
unit.
The SCSI
interface
has
been
tested
with
a Rodime 20
MB
hard
disc
drive.
Note:
The
source
code
of
the
driver
for
this
Rodime
drive
has
been
stored
on
floppy
and
bypacked
with
your
system.
Change
of
the
driver
in
order
to
suit
other
hard
disc
drives
are
to
be
done
by
the
user
at
his
own
risk.
1.7.1
Hardware
srecification
SCSI
interface
board
The SCSI
interface
board
has
the
following
features
single
ended
(cable
length:
maximum
6m)
-
asynchronous
data
transfer
(maximum
transfer
rate:
1.5
Mbyte/sec.)
-
initiator
role
-
built-in
DMA
controller
(DMA
transfer
from
SCSI
to
Memory)
programmable
interrupt
handling
for
SCSI
to
CPU68070
-
hardware
bus
arbitration
-
disconnect/reconnect
-
on-board
ROM
socket
with
selectable
addressing
capacity
- Rodime
hard
disc
driver
in
ROM
-
shielded
50
pin
connector
7-16
www.icdia.co.uk

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