Fixed RAM mask on resetx86(), fixes soft reset triggered by MS-DOS Setup;

Changed version to 1.04.

src/808x.c

@@ -645,14 +645,7 @@ void resetx86()
         eflags=0;
         cgate32=0;
         loadcs(0xFFFF);
-	if (AT)
-	{
-		rammask = mem_a20_state ? 0xffffffff : 0xffefffff;
-	}
-	else
-	{
-		rammask = 0xfffff;
-	}
+        rammask = AT ? 0xFFFFFFFF : 0xfffff;
         idt.base = 0;
         flags=2;
         makeznptable();

src/86box.h

@@ -1,4 +1,4 @@
 /* Copyright holders: Tenshi
    see COPYING for more details
 */
-#define emulator_version "1.10"
+#define emulator_version "1.04"

src/mem.c

@@ -2250,22 +2250,20 @@ void mem_a20_recalc()
 
 static uint8_t port_92_read(uint16_t port, void *priv)
 {
-	return (port_92_reg & 3) | 0x24;
+	return port_92_reg;
 }
 
 static void port_92_write(uint16_t port, uint8_t val, void *priv)
 {
-	mem_a20_alt = val & 2;
-	mem_a20_recalc();
-
-	if (!(port_92_reg & 1) && (val & 1))
+	if (val & 1)
 	{
-		// pclog("Port 92: Soft reset\n");
 		softresetx86();
+		cpu_set_edx();
 	}
 
-	port_92_reg = val & 3;
+	port_92_reg = val & ~-1;
 
+	mem_a20_alt = val & 2;
 	mem_a20_recalc();
 }