Installation Notes for OS/2
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NOTES: Attempting to execute the mach64 INSTALL program with a Com 4 
       device installed will cause the system to hang.  Remove any 
       device that uses the base I/O 2E8, before running INSTALL.

       Run INSTALL (from your original mach64 diskettes, or from M64UTL.ZIP) 
       from within a full screen DOS session (under OS/2) and check "Advanced 
       Setup", to ensure that you have selected an appropriate monitor type:
    
       a) OS/2 requires that the 640x480 resolution be configured for the 
          IBM default 60Hz vertical refresh rate.

       b) You must configure the card for all resolutions that your monitor 
          can support in order to have them functioning correctly under OS/2.  
          Only those resolutions that you have configured will display 
          correctly.
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PROCEDURE:

1) Unzip the contents LOAD64.ZIP and M64V75.ZIP into a temporary directory
   on your hard disk.

2) Check The Minimized Window Viewer to see if you have any WIN-OS/2 or
   DOS sessions iconized. Close them all as LOAD64 may not work if a 
   WIN-OS/2 session is running.

3) Run LOAD64 from a full-screen DOS session under OS/2.  
   Use the menus to select Driver Installation for IBM OS/2.  
   Then follow the instructions given on the screen.  
   
Note:  If PM Desktop does not reappear after exiting from the full screen 
       DOS session, pressing <Enter> will bring you back to full screen.  
       You must reboot to get back to the PM Desktop.

4) When the mach64 driver is installed the SETVGA command will request the
   mach64 drivers diskette to be inserted in to default installation drive.
   SETVGA will not proceed without this diskette.  Use the following
   procedure to create the required mach64 diskette:

   a) Boot DOS, or enter a full screen DOS session.
   b) Insert a blank disk into drive A: (the bootable floppy drive)
   c) Change directory to the directory created by the installation of
      the mach64 OS2 drivers (default c:\MACH_OS2)
   d) The mach64 disk must have a volume label of MACH64OS2. To create this
      label, at the C:\MACH_OS2 (default) directory type:
           LABEL A:
      You will then see at prompt stating "Volume label (11 characters,
      enter for none)?", please type:
           MACH64OS2
    e) Copy the contents of the MACH_OS2 directory onto the floppy disk.

5) Run DSPINSTL from within an OS/2 window.

6) When the Display Driver Install panel appears, select Primary Display
   and click OK to bring up a list of choices.  You should see an option for
   ATI mach64.

7) Select 'ATI Technologies mach64' from the list and click OK. Ignore the
   error message pop-up which says "The installed adapter does not support
   the selected display driver.  Do you wish to continue?" and click OK.

8) When the source directory panel appears, select 'Change' and enter:
   C:\MACH_OS2 (replace c: with your boot drive letter if you don't use c)
   Click 'Set' and then 'Install'. After the files are copied, exit the OS/2
   window or full screen session. Shut down and restart your system.

9) The PM driver will first come up in 640x480, 256 colors mode.  Use the
   following steps to change the screen resolutions or number of colors:

   a) Open 'OS/2 System' icon.
   b) Open 'System Setup' icon.
   c) Open 'System' icon.
   b) Select the 'Screen' tab.
   e) Select the desired resolution and number of colors from the list.
   f) Double click on the system menu icon or select close from the system
      menu to close the window.
   g) Shut down and restart your system.

NOTE:    Changing Refresh Rates

When changing refresh rates of 640x480 resolution using the mach64
installation diskettes from a DOS full screen window, the computer freezes
up.  IBM OS/2 must use 60 Hz VGA frequency since it sets the registers 
directly.  This is a design limitation of OS/2 and only applies to the 
640x480 resolution. Other resolutions may be configured at any vertical 
refresh rate.

For further details, please see README.OS2 after installing the drivers.

