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|1-A1200 to VGA


|1-Monitor Adaptor.


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                      Produced and tested by D!ck
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I  made this cable a while ago using diagrams available at the time as I
had  read  in  Format that it was possible to use a VGA monitor with the
A1200  with no extra hardware.  Unfortunately at the time I was none too
familiar  with  the  concept  of  monitor  drivers and didn't pursue the
matter  any further, instead the wretched cable was thrown into a drawer
and forgotten about.

Recently though I remembered it and tried it out, and low and behold, it
works!   Straight  away  I  set  up  a friend's A1200 to run the monitor
driver  as  required, thus enabling him to run Workbench in 640x480 with
no flickering at all.

Here are the steps you need to take...

1:  Connect your A1200 to your normal TV or monitor and boot up
    Workbench.

2:  Create a script file called "Use_VGA" in your SYS:Utilities/ dir
    which consists of the following line:

                 SYS:Prefs/Screenmode FROM S:VGA.cfg USE

3:  Create a project icon for the script, make the default tool
    "C:IconX", and leave it out on your Workbench for fast access.

4:  Ensure you have the "Multiscan" and "VGAOnly" monitor drivers in
    your DEVS:Monitors/ directory.

5:  Switch off all power, disconnect your TV/monitor and attach the
    VGA Monitor using the new cable.

6:  Switch on and boot Workbench, the display should be stretched
    across the screen twice.

7.  Load up SYS:Prefs/ScreenMode and select "Multiscan", the 640x480
    mode that is not interlaced.  Select "USE" (not "SAVE"!) and the
    display should right itself.  This may take you a while because of
    the display, do not worry about damaging the VGA monitor, just
    persevere!

8:  Open a CLI window and type the following:

        Copy ENV:Sys/screenmode.prefs TO S:VGA.cfg <Enter>

Now  if  you  reset, your machine will boot into a normal Workbench when
connected  to  your normal monitor.  When you connect a VGA monitor this
display  will look like poo, but you can flick straight to VGA simply by
double-clicking  on  the  "Use_VGA"  icon.  If you want to boot into VGA
every time, just repeat step 7, but select "SAVE" instead of "USE".

Notes:
""""""
The  display  may  glitch  for  a  while  when you first connect the VGA
Monitor  to your computer, this isn't anything to worry about, it's just
a bit annoying!  The display does settle down eventually though.

Only  programs  that  open  a  Clone of the Workbench screen will open a
screen that is usable on the VGA Monitor.  To fix this you need to run a
progam  that forces all screens into SVGA.  The one I remember using was
called  ForceVGA  or something similar, which can be put into the script
called "Use_VGA" so that it is run automatically.

Games,  especially  those  booted from floppy, will almost certainly not
work  if  they  do not open an intuition screen, so you can forget about
those  completely  for  now.   However,  you would mainly be using a VGA
Monitor  for programming Workbench and CLI Utilities, DTP or Word Proce-
ssing  and  for surfing the internet, three tasks for which this project
is absolutely ideal!


end
