[comp.sys.atari.st] Connecting an RGB monitor to a 1040STE

malay@sae.com (Bob Malay) (04/04/91)

I'm posting this again, our news processor went haywire and we didn't receive
any messages for two weeks.

-----------------original message----------------------------------------------
Help! How can I connect a Zenith Data Systems ZVM-135 RGB Monitor to an
Atari 1040STE? Here's the ZVM-135's connector pinout:
      
            1  - Negative horizontal or negative composite sync*
            2  - Positive horizontal or positive composite sync*
            3  - NC
            4  - Positive vertical or positive composite sync
            5  - Green input
            6  - Blue input
            7  - Red input
            8  - NC
            9  - NC
            10 - Green feedthrough
            11 - Apple X1 Input
            12 - Apple X2 Input
            13 - Apple X3 Input
            14 - Negative vertical or negative composite sync
            15 - IBM intensity
            16 - Ground
            17 - NC
            18 - Audio input
            19 - Ground
            20 - Composite video input
            21 - Red feedthrough
            22 - Blue feedthrough
            23 - NC
            24 - NC
            25 - Apple X8 input

*NOTE: Composite sync must be supplied to both the horizontal and vertical
       sync inputs.

Specifications:

inputs .......  DB-25 type connector
                R,G, and B signals TTL level analog positive
                Composite - TTL positive or negative
                Horiz sync - TTL positive or negative
                Vert sync - TTL positive or negative
                Ground
                Audio - .5V to 1V rms.
                Audio ground.
                Apple III video - (4)
                IBM intensity
                Composite video.



This monitor is switchable from RGB to Composite. It has an DB-25 RGB
connector and a set of RCA phono type jacks for composite. There was
a message floating around (dated 4 Jan 87) that showed how to connect
a Sony XBR monitor to an ST and it works (I've seen the result). I 
realize that I could just use the composite input with the STE but I 
would like to use the RGB for obvious reasons. Anybody got any clues????


Bob Malay