From: Adam Lawrence Salter <adam@zooid.guild.org>
Subject: Re: COMPUTER MONITOR?
Organization: The Zoo of Ids
Date: Sat, 9 Jan 1993 01:43:13 GMT
	<1993Jan6.032120.5094@nrc.com>

  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
Newsgroups: rec.games.video