larserio@IFI.UIO.NO (LarsErikOsterud) (06/21/91)
Multisync monitor switchbox and cabel (this is tested and works) """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" If you want monochrome your monitor must handle 71 Hz frequency NOT all monitors do this - To be sure - Test before you buy it! Multisync side (no pin number - they depend on your monitor outlet) Red Green Blue HorSync VertSync Ground | | | | | | | | | | | | SW1---SW2---SW3-------. | | |---SW4---. | | | | | | | | | | | | | | | | Red Green Blue Monochrome HorSync VertSync Ground MonoDetect 7 6 10 11 9 12 13 4 Atari ST, STE or MEGA STE side (number as in operating manual) The switch you need must be of the type with 4 pins in that can be switched between 2 x 4 pins out (two choices) and works like this: Switches 1,2,3: When in color red, green and blue passes straight --------------- through without contact with each other or mono. When in monochrome they are all disconnected from ST RGB and instead all connected to ST monochrome -------- ST RGB (in color mode) Monitor --------- SW -------- ST Mono (in mono mode) Switch 4: Open in color, monochrome detect not connected. --------- When in monochrome monochrome detect is connected to ground (this tells the ST it's in monochrome). Monitor GND --------------- ST GND (always connected) SW ------ ST Mono Detect (in mono) Don't worry, the worst bit isn't making this - it's getting the 13-pin Atari monitor connector for the ST side and solder it !! Lars-Erik / ABK-BBS +47 2132659 / ____ ______ ________________________ Osterud / larserio@ifi.uio.no / /___ / The norwegian ST __________/ ______________________/ ____/ / Klubben, user association
vsnyder@jato.jpl.nasa.gov (Van Snyder) (06/26/91)
In article <CMM.0.90.2.677508705.larserio@kvart.ifi.uio.no> larserio@ifi.uio.no writes: >Multisync monitor switchbox and cabel (this is tested and works) >"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" >If you want monochrome your monitor must handle 71 Hz frequency >NOT all monitors do this - To be sure - Test before you buy it! > > > Multisync side (no pin number - they depend on your monitor outlet) > > Red Green Blue HorSync VertSync Ground > | | | | | | > | | | | | | > SW1---SW2---SW3-------. | | |---SW4---. > | | | | | | | | > | | | | | | | | > Red Green Blue Monochrome HorSync VertSync Ground MonoDetect > 7 6 10 11 9 12 13 4 I did this with a NEC-2D and the monochrome image came out about 1/3 of a screen high. >Don't worry, the worst bit isn't making this - it's getting the >13-pin Atari monitor connector for the ST side and solder it !! I simply cut my Atari cable and soldered in a pair of DB-15's. They're really easy to find. When I got tired of switching monitors by changing DB-15 plugs, I built a switch using a 7-pole rotary, and some MORE DB-15's. The one I found in a surplus store for $US 3.95 had 5 positions, but I only used two. > Lars-Erik / ABK-BBS +47 2132659 / ____ ______ ________________________ > Osterud / larserio@ifi.uio.no / /___ / The norwegian ST >__________/ ______________________/ ____/ / Klubben, user association -- vsnyder@jato.Jpl.Nasa.Gov ames!elroy!jato!vsnyder vsnyder@jato.uucp
larserio@IFI.UIO.NO (LarsErikOsterud) (06/26/91)
That's right... The monochrome image is small and placed to one side. The best soulution is a multisync with individual adjustment for EACH mode on the back panel (my friend has one like that). Else you have to adjust HEHT, HORISONTAL and VERTICAL offset all the time :-( Lars-Erik / ABK-BBS +47 2132659 / ____ ______ ________________________ Osterud / larserio@ifi.uio.no / /___ / The norwegian ST __________/ ______________________/ ____/ / Klubben, user association