From: ohland@charter.net   
      
   Now that the memory settings have been exposed...   
      
   I am not an EE, nor did I sleep at "Holiday Inn Express" last night...   
      
   "Memory Mapping" is the window used to move video information between   
   system main memory and the Matrox MGA.   
      
   Map1 (AC00) is used if the "on-board VGA is enabled". But why is this   
   choice removed in ver 1.00? Also, WHICH "on-board VGA" is enabled? The   
   system VGA?   
      
   "MGA on-board VGA" has ONE option, stuff the MGA VGA BIOS into   
   C000-C7FF. "on-board VGA" and "MGA on-board VGA" appear to be different.   
      
   RAMBIOS.SYS might be for other MCA systems (non-PS/2) which cannot   
   "shadow" the MGA VGA BIOS. -OR- possumbly, handle the possumbility that   
   the system-board VGA -MUST- use C000-C7FF.   
      
   Memory Mapping   
            " Map2 C8000 "         pos[1]=XXXXX010b mem 0c8000h-0cbfffh   
              Map3 CC000           pos[1]=XXXXX011b mem 0cc000h-0cffffh   
              Map4 D0000           pos[1]=XXXXX100b mem 0d0000h-0d3fffh   
              Map5 D4000           pos[1]=XXXXX101b mem 0d4000h-0d7fffh   
              Map6 D8000           pos[1]=XXXXX110b mem 0d8000h-0dbfffh   
              Map7 DC000           pos[1]=XXXXX111b mem 0dc000h-0dffffh   
              Map1 AC000           pos[1]=XXXXX000b   
      
   Help There are 7 16K windows where you can map the MGA.   
   Note: Use Map1 only if the on-board VGA is enabled.   
      
   NOTE: ver 1.00 removes Map1 (AC000), only 6 16k windows (duh!)   
      
   MGA on-board VGA   
        " VGA Enabled "        pos[1]=XXXX0XXXb mem 0c0000h-0c7fffh   
          VGA Disabled         pos[1]=XXXX1XXXb   
      
   Help Select 'VGA Enabled' if you want a single screen solution.   
   This enables the VGA bios at C0000h (on the MGA adapter).   
      
      
   > There are two alternatives to using RAMBIOS.SYS. The first method uses   
   > your computer system's ability to shadow a VGA BIOS. If your system   
   > supports this capability, it is usually accomplished through the   
   > system's configuration program. There are certain instances where this   
   > method may not work. The second method is to use a memory manager to   
   > shadow the BIOS.   
   >   
   > Tomas Slavotinek wrote:   
   >> The Impression/3/M page is up:   
   >> https://ardent-tool.com/video/Matrox_Impression.html   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)