Newsgroups: rec.games.video
Subject: Mac monitor with SNES/Genesis? (was Re: COMPUTER MONITOR?)
From: camp5@csbina.csubak.edu
Date: 9 Jan 93 10:43:27 -0800
Organization: California State University, Bakersfield

In article <1993Jan9.014313.13060@zooid.guild.org>, Adam Lawrence Salter <adam@zooid.guild.org> writes:
>   In article <1993Jan6.032120.5094@nrc.com>,
>   Mike Goodglick <mikey@nrc.com> writes:
> 
>>Subject: COMPUTER MONITOR?
>>From: Jayesh Patel, jayesh@andromeda.rutgers.edu
>>Date: 16 Dec 92 14:53:39 GMT
>>In article <Dec.16.09.53.31.1992.10330@andromeda.rutgers.edu> Jayesh
>>Patel, jayesh@andromeda.rutgers.edu writes:
>>>Hey, I was wondering.....Do you need a specific cable to attach the
>>>GENESIS to a VGA computer monitor....What kind of cable is it?  Where
>>>can I get one?  
>>>
>>>Is the graphics any better or worse?  How about the movement...any
>>slower?
>>>
>>>THANKS!!!!!
>>>
>>>Jay.
>>I am glad you asked....here is a instructions on how to modify your
>>Genesis to hand VGA.
>>I wrote this about 2 months ago.
>> 
>>If you have any questions just leave me e-mail.
>>
>>--------------
>>Tonight I modifyed my Genesis with almost TOTAL SUCCESS!!!.
>>
>>What I did was I disconnected the 9-pin modem port on the Genesis
>>and made that port a RGB monitor connection...Works like a dream!....
>>Here's the scoop.
>>
>>
>>Genesis A/V connector (looking from back of Genesis):
>>  
>>                                        Blue
>>                                          |
>>  Negative Combined Sync---- >	0   |	0   <-----Red
>>          Composite Video --->         0  0  0   <-----Audio
>>                          Green- --->   0 0 0  <----+ 5 Volts
>>                                          ^
>>                                          |
>>                                          |
>>                                      Ground
>>
>>
>>
>>
>>After Opening the Genesis and unsoldering the 9-pin modem connector,
>>I connected the following A/V pins to it.
>>
>>
>>Genesis former modem connector (looking from  back of Genesis):
>>                         5  4  3  2  1
>>                         o  o  o  o  o
>>                           o  o  o  o
>>                           9  8  7  6
>>
>>
>>
>>Connected as follows:
>>
>>DB-9
>>       Pin                         A/V Function
>>	1                            RED
>>	2                            GREEN
>>	3                            BLUE
>>	4                            Negative Combined Sync
>>	5                            (Did not connect)
>>	6                            (Did not connect)	
>>	7                            (Did not connect)
>>	8                            (Did not connect)
>>	9                            Ground
>>
>>
>>
>>I connected this configuration to a NEC MultiSync....Here are the
>> pin configs for the Multisync:
>>
>>
>>DB-9
>>        Pin                       Pin Function
>>	1                            RED
>>	2                            GREEN
>>	3                            BLUE
>>	4                            H. Sync
>>	5                            V. Sync
>>	6                            Red Ground
>>	7                            Green Ground
>>	8                            Blue Ground
>>	9                            Ground
>>
>>
>>Here is the small problem that I am having....When I use OR just hook
>>the new RGB video out (even with the Genesis off)...I get a annoying hum
>>in my speakers....While the RGB cable and the A/V cable are plugged in,
>>at the same time, I get a kind of rastering type of faint image on the A/V
>>screen...I also still have the humm.
>>I also think that the picture is a bit degraded on the composite out.
>>
>>Benefits:
>>
>>And INCREDIBLE video image on the RGB monitor...the image is almost
>>TOO GOOD!...You can almost see each pixal!.
>>
>>If somebody out there in net land can figure out why I get the Humm &
>>the raster problem, we will have one hell of a hack here!!
>>If it requires some additional parts..please let me know...maybe
>>resistors...blah, blah....dunno, electronics I don't know...wiring I do. 
>> 
>>Later!,
>>
>>Mike Goodglick
>>mikey@nrc.com
> 
> 
>   Am I insane? I've always had the impression that you couldn't attach a SNES
> or Genesis to a VGA monitor. I have a multisync (not a NEC) and I/m pretty
> sure that an RGB signal wouldn't work on it, would it? It has a 15-pin
> connector.
> 
> 
>                                                                  Thanks,
>                                                                   Adam
> 
> adam@zooid.guild.org

How could you hook up a SNES or Genesis  to an Apple Macintosh color monitor?
It is 640 x 480 resolution and has grounds for each color. If I could do it 
the picture would be INCREDIBLY good... each pixel is clear in this resolution,
so imagine a 320 x 200 picture!   Any ideas, guys?