Re-added the Cardex Tseng ET4000/W32p (which works better than the Diamond Stealth32), and moved the Diamond Stealth32 to the Dev branch;

Re-added the ATi Mach64GX ISA, this time with a working BIOS;
Fixed some CGA/EGA/(S)VGA timing mess-ups.

src/win/Makefile.mingw

@@ -8,7 +8,7 @@
 #
 #		Makefile for Win32 (MinGW32) environment.
 #
-# Version:	@(#)Makefile.mingw	1.0.92	2018/01/16
+# Version:	@(#)Makefile.mingw	1.0.93	2018/01/25
 #
 # Authors:	Miran Grca, <mgrca8@gmail.com>
 #               Fred N. van Kempen, <decwiz@yahoo.com>
@@ -92,6 +92,9 @@ endif
 ifndef PAS16
 PAS16		:= n
 endif
+ifndef STEALTH32
+STEALTH32	:= n
+endif
 ifndef DYNAREC
 DYNAREC		:= y
 endif
@@ -116,6 +119,7 @@ NE1000		:= y
 NV_RIVA		:= y
 PAS16		:= y
 PORTABLE3	:= y
+STEALTH32	:= y
 VNC		:= y
 endif
 
@@ -337,6 +341,10 @@ ifeq ($(PORTABLE3), y)
 OPTS		+= -DUSE_PORTABLE3
 endif
 
+ifeq ($(STEALTH32), y)
+OPTS		+= -DUSE_STEALTH32
+endif
+
 endif