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Re: Using a Mac monitor on a GS?
Steve Jensen (sjensen@primenetyourknife.com) wrote:
: I have a Sony CPD-1302 multisynch monitor I'd like to try on a GS.
: Has anyone done this? I have a Mac 9-15 pin cable. Here's some
: specs:
:
: Scan Rates:
: Horizontal scan: 15-34 Khz
: Vertical refresh: 50-100 Hz
: Bandwidth: 25 Mhz
: Mac Adapter:
: Video Signal:
: Signal type: Analog / Digital
: Sync: Green
:
: Physical Specifications:
: Type of connector: 9 pin
: Dot pitch: .25 mm
Okay, this all looks good. It should work. Now, I am guessing it
will also sync on the horizontal sync--not just the sync on green.
Still, that's good to know. I think the document I have included will
help in constructing a cable.
This document represents my revised cable diagram for the NEC
Multisync II. These pinouts are more accurate than any previous
postings I may have made converning the NEC Multisync II. These
pinouts are fairly standard for any VGA capable monitor with a 9-pin
subminiture D connector. Using these same pinouts for the NEC you
can make cables for video game systems, too. The RGB output of the
NEC makes most home game consoles look _very_ good. Using such a
cable, DOOM and Wolf3D on my Atari Jaguar (64-bit) look much better
than the versions for the PC or Mac.
I am indebted to Nathan Mate's FAQs for the pinouts. In fact, the GS
pinouts come directly from the FAQs. I give my permission for this
document to be archived in Nathan's FAQ archive if he so desires.
Hope this helps. Email me if you have any questions.
Pin assignment of NEC Multisync II monitor:
pin # analog/digital RGB signal
1 Red
2 Green
3 Blue
4 Horizontal Sync
5 Vertical Sync
6 Red Ground (return)
7 Green Ground (return)
8 Blue Ground (return)
9 Ground
____________________
\ 5 4 3 2 1 /
\ /
\ 9 8 7 6 /
-------------
pin assignment of IIGS RGB connector:
pin # signal
1 ground (for red ?)
2 red
3 composite sync.
4 not used
5 green
6 ground (for green ?)
7 -5 V
8 +12 V
9 blue
10 not used
11 audio output (not used)
12 monochrome screen off (???)
13 ground (for blue ?)
14 not used
15 not used
system ground
|
|
__________|_____________________________
\ 8 7 6 5 4 3 2 1 /
\ 15 14 13 12 11 10 9 /
------------------------------------
THE PIN ASSIGNMENTS...
On the //GS RGB Monitor Port On the NEC Multisync II
In
PIN NUMBER PIN NUMBER
2..............................................1
(Analog RED) (Analog RED)
5..............................................2
(Analog GREEN) (Analog GREEN)
9.............................................3
(Analog BLUE) (Analog BLUE)
3.............................................4
(Composite SYNC) (Horizontal SYNC)
1.............................................6
(Signal GROUND Red) (GROUND)
6.............................................7
(Signal GROUND Green) (GROUND)
13.............................................8
(Signal GROUND Blue) (GROUND)
4.............................................9
(No Connection) (GROUND)
Although there are six pins on the 9 pins on the NEC Multisync II, DO
NOT hook up Pin 5 (Vertical Sync) to the GS 15 Pin connector. Just
chop it off. The NEC Multisync II is capable of composite sync on
its horizontal sync pin. So, for GS purposes it is simply not
needed. However, if you were to use the NEC with a SecondSight card,
the Vertical Sync pin would be used. However, if you are going to
use the SecondSight with the NEC, I'd use a SVGA to VGA cable (can be
purchased at any decent computer store) because the NEC doesn't
respond well to the interlacing that is attempted through the
SecondSights GS RGB connector.
Here is some more technical information that you might find
interesting or useful.
Specifications
Model number JC-1402HMA
Display Format
Signal input:
Separate synchronization TTL
Horizontal synchronization positive/negative
Vertical synchronization positive/negative
Composite synchronization TTL positive/negative
0.3 V p-p (on green)
Horizontal frequency 15.5 to 35 kHz
Vertical frequency 50/80 Hz auto
Technology Tri-dot
Picture tube Color
Phosphor Med
Bandwidth 30 Mhz
CRT Size 14 inches
(13 inches viewable image
size)
Deflection angle 90
Dot pitch 0.31 mm
Physical
Connector 9-pin D-subminiature
(I've never seen this connector) --> 15-pin mini D-subminiature
(and I've never seen pinouts for it) (does it exist?)
Width 360 mm (14.2 inches)
Height 372 mm (14.7 inches)
Depth 400 mm (15.8 inches)
Weight 16 kg (35 lb)
Electrical
FCC class B
Average power consumption 92 W
Power supply 120 VAC at 60 Hz
Resolutions
Video Horizontal Vertical
Monochrome 720 350
CGA 320 200
CGA 640 200
EGA 640 350
VGA 640 480
Super VGA 800 560
Super VGA: Although the maximum resolution the monitor can display
properly is 800 x 560, it is commonly used for 800 x 600. This will
use the "overscan" area of the monitor and only lose a couple of
lines. However, this is pretty much a non-issue when used with the
SecondSight card--I haven't seen any software that uses the 800x600
resolution. I'd love to be corrected on this.