Implement Regkey to re-enable possibility to switch between window ma…

…gnification sizes. #95

ntvdmpatch/doc/patches.txt

@@ -37,6 +37,9 @@ ega_crash.patch     - Console graphics is required, as newer Windows display
                       crashes when not properly checked, so added checks for 
                       this.
 emm.patch           - Fixes a little problem in the EMM-Manager
+eyestrain.patch     - Commandline parameters like the hotkey to change video
+                      size can't get passed to NTVDM in newer windows versions,
+                      therefore, parameter is read from registry cpuenv key
 framerate.patch     - Increase screen refresh rate so that Video graphics 
                       output is smoother and not so choppy anymore.
 fixexe.patch        - It seems like the creator of the OpenNT package 

ntvdmpatch/patches/minnt/ega_crash.patch

@@ -1,30 +1,78 @@
 --- NT4\private\mvdm\softpc.new\host\src\nt_ega.c
 +++ nt\private\mvdm\softpc.new\host\src\nt_ega.c
 590a591,592
->     int max_width = sc.PC_W_Width >> 1,
->         max_height = sc.PC_W_Height >> 1;
-608c610
+>     int max_width = 320,
+>         max_height = 200;
+608,609c610,615
 <     if( height>200 || width>40 ){
----
-> 
-609c612,616
 <    assert2( NO, "VDM: nt_ega_lo_graph_std() w=%d h=%d", width, height );
 ---
+> 
 >     if ((screen_x >= max_width) || (screen_y >= max_height))
 >     {
 >         sub_note_trace2(EGA_HOST_VERBOSE,
 >                         "VDM: nt_ega_lo_graph_std() x=%d y=%d",
 >                         screen_x, screen_y);
-611a624,627
+611a618,621
 >     if (screen_x + width > max_width)
 >         width = max_width - screen_x;
 >     if (screen_y + height > max_height)
 >         height = max_height - screen_y;
-672c688
+672c682
 <         while(--local_width);
 ---
 >         while((--local_width)>0);
-677c693
+677c687
 <     while(--local_height);
 ---
 >     while((--local_height)>0);
+714a725,726
+>     int max_width = 320,
+>         max_height = 200;
+732,733c744,748
+<     if( height>200 || width>40 ){
+<    assert2( NO, "VDM: nt_ega_lo_graph_big() w=%d h=%d", width, height );
+---
+>     if ((screen_x >= max_width) || (screen_y >= max_height))
+>     {
+>         sub_note_trace2(EGA_HOST_VERBOSE,
+>                         "VDM: nt_ega_lo_graph_big() x=%d y=%d",
+>                         screen_x, screen_y);
+735a751,754
+>     if (screen_x + width > max_width)
+>         width = max_width - screen_x;
+>     if (screen_y + height > max_height)
+>         height = max_height - screen_y;
+819c838
+<         while( --local_width );
+---
+>         while((--local_width)>0);
+824c843
+<     while(--local_height);
+---
+>     while((--local_height)>0);
+863a883,884
+>     int max_width = 320,
+>         max_height = 200;
+883,884c904,908
+<     if( height>200 || width>40 ){
+<    assert2( NO, "VDM: nt_ega_lo_graph_huge() w=%d h=%d", width, height );
+---
+>     if ((screen_x >= max_width) || (screen_y >= max_height))
+>     {
+>         sub_note_trace2(EGA_HOST_VERBOSE,
+>                         "VDM: nt_ega_lo_graph_huge() x=%d y=%d",
+>                         screen_x, screen_y);
+886a911,914
+>     if (screen_x + width > max_width)
+>         width = max_width - screen_x;
+>     if (screen_y + height > max_height)
+>         height = max_height - screen_y;
+996c1024
+<         while( --local_width );
+---
+>         while((--local_width)>0);
+1000c1028
+<     } while(--local_height);
+---
+>     } while((--local_height)>0);

ntvdmpatch/patches/minnt/eyestrain.patch

@@ -0,0 +1,11 @@
+--- NT4\private\mvdm\softpc.new\host\src\nt_reset.c
++++ nt\private\mvdm\softpc.new\host\src\nt_reset.c
+311a312,319
+> #ifndef MONITOR // Newer Windows versions don't have possibility to edit cmdline, so get from env
+> 	if (!BWVKey && (psz=host_getenv(achES)))
+> 	{
+> 	   BWVKey = (WORD)strtoul(psz, NULL, 16);
+> 	   if (BWVKey > 0xFE)
+> 		   BWVKey = 0;
+> 	}
+> #endif

readme.txt

@@ -120,11 +120,9 @@ setting a registry key.
 
 Some registry keys also need to be set to show that the NTVDM is present and
 can get called. 
-So this is all rather complex, but it sort of works (except DPMI-stuff, 
-which doesn't seem to work too well or still crash for unknown resons)
-with some patches to the operating system. It's enough as a 
-proof-of-concept and to use it for most business applications and even some
-games.
+So this is all rather complex, but it sort of works with some patches to 
+the operating system. It's enough as a proof-of-concept and to use it for 
+most business applications and even some games.
 
 Cool, where can I get it?
 =========================
@@ -151,7 +149,9 @@ There are various "flavours" of NTVDM that can be built:
    The original NT4 NTVDM. Maybe the easiest version to build, but
    it doesn't have multilanguage and lacks some features like LFN
    This has been the default repository until Feb/2020 where 
-   development has been switches to MINNT tree.
+   development has been switched to MINNT tree.
+   This build method therefore is DEPRECATED in favour of the 
+   MINNT build systemand will not receive any future updates!
    Please note that you need Windows XP for building.
    Build instructions in: doc\old-src.txt
  * HAXM
@@ -225,6 +225,10 @@ I want to have a proper soundcard emulation
 MINNT build supports AdLib soundcard emulation by incorporating code parts
 of SoundFX2000 into NTVDM SB20 emulation.
 
+To make it more clear: 
+  As MUSIC device, select AdLib
+  As SOUND device, select Soundblaster 2.0
+
 But you can also try to use the real
 
 http://www.softsystem.co.uk/products/soundfx.htm
@@ -234,7 +238,8 @@ see:
 https://github.com/leecher1337/ntvdmx64/issues/40#issuecomment-510697281
 
 But it sometimes causes applications to hang and not react to keyboard
-input.
+input, so only try it if the NTVDM internal sound emulation isn't good 
+enough for your needs.
 
 
 The PC speaker output is choppy and generally inaccurate, I want my PC
@@ -265,11 +270,33 @@ you are launching your 16 bit application from needs to be restarted.
 If unsure, you can reboot your machine after installation/uninstallation of
 WineVDM handlers.
 
-To debug winevdm, before launching your application:
+To debug wow32, before launching your application:
 set WOWTRACE=C:\log.txt
 set WOWLOGLVL=16
 
 
+Is there a way to enlarge the graphics window?
+---------------------------------------------------------------------------
+You can use the EyeStrain parameter for this.
+Just execute reg\eyestrain.reg from the release-folder of NTVDMx64 and
+as soon as the parameter is set, you can switch between 3 variants of
+graphics display (Standard - Big - Huge) by pressing the "Scroll Lock" key.
+This only works in graphics mode!
+
+Here is how it works:
+The .reg file creates a REG_SZ key named "EyeStrain" under
+HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WOW\CpuEnv
+which contains the string representatino of a hex value of the VK_
+virtual key code that needs to be checked for in order to switch between
+magnificaton sizes. The .reg file contains "91" as value, as 0x91 is the
+VK_SCROLL.
+You can find a list of Virtual keycodes here and change it accordingly:
+https://nehe.gamedev.net/article/msdn_virtualkey_codes/15009/
+
+Further explanation how it used to work on MIPS/Alpha builds:
+https://github.com/leecher1337/ntvdmx64/issues/95#issuecomment-637202206
+
+
 I want to use my mouse in my textmode application and not select text 
 ---------------------------------------------------------------------------
 You forgot to disable QuickEdit mode of the windows console.
@@ -281,6 +308,11 @@ I want to print to my windows GDI printer
 Google "DOSPR.ZIP"
 
 
+Why doesn't QUAKE work?
+---------------------------------------------------------------------------
+http://www.delorie.com/djgpp/v2faq/faq18_6.html
+
+
 Are there any documents that describe the inner workings of the NTVDM 
 subsystem?
 ---------------------------------------------------------------------------