diff --git a/src/ints/int10.cpp b/src/ints/int10.cpp
index ad4811c8..a236e8e9 100644
--- a/src/ints/int10.cpp
+++ b/src/ints/int10.cpp
@@ -16,7 +16,6 @@
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
-
 #include <string.h>
 #include "dosbox.h"
 #include "bios.h"
@@ -54,14 +53,15 @@ static Bitu INT10_Handler(void) {
 		LOG_WARN("INT10:04:Ligthpen not supported");
 		break;
 	case 0x05:								/* Set Active Page */
-		INT10_SetActivePage(reg_al);
+		if (reg_al & 0x80) LOG_DEBUG("Func %x",reg_al);
+		else INT10_SetActivePage(reg_al);
 		break;	
 	case 0x06:								/* Scroll Up */
 //TODO Graphics mode scroll
-		INT10_ScrollUpWindow(reg_ch,reg_cl,reg_dh,reg_dl,reg_al,reg_bh,0xFF);
+		INT10_ScrollWindow(reg_ch,reg_cl,reg_dh,reg_dl,-reg_al,reg_bh,0xFF);
 		break;
 	case 0x07:								/* Scroll Down */
-		INT10_ScrollDownWindow(reg_ch,reg_cl,reg_dh,reg_dl,reg_al,reg_bh,0xFF);
+		INT10_ScrollWindow(reg_ch,reg_cl,reg_dh,reg_dl,reg_al,reg_bh,0xFF);
 		break;
 	case 0x08:								/* Read character & attribute at cursor */
 //TODO Check for GRAPH and then just return 
@@ -260,7 +260,6 @@ static void INT10_InitVGA(void) {
 };
 
 void INT10_StartUp(void) {
-
 	INT10_InitVGA();
 	/* Setup the INT 10 vector */
 	call_10=CALLBACK_Allocate();	
diff --git a/src/ints/int10.h b/src/ints/int10.h
index 5c27f537..41ae488c 100644
--- a/src/ints/int10.h
+++ b/src/ints/int10.h
@@ -102,11 +102,15 @@
 #define PLANAR4    0x05
 #define LINEAR8    0x06
 
-// for SVGA
-#define LINEAR15   0x07
-#define LINEAR16   0x08
-#define LINEAR24   0x09
-#define LINEAR32   0x0
+// for Tandy
+
+#define TANDY16    0x0A
+	
+
+#define LINEAR15   0x10
+#define LINEAR16   0x11
+#define LINEAR24   0x12
+#define LINEAR32   0x13
 
 
 #define SCREEN_SIZE(x,y) (((x*y*2)|0x00ff)+1)
@@ -167,14 +171,11 @@ inline Bit8u CURSOR_POS_ROW(Bit8u page) {
 
 void INT10_SetVideoMode(Bit8u mode);
 
-void INT10_ScrollUpWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8u nlines,Bit8u attr,Bit8u page);
-void INT10_ScrollDownWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8u nlines,Bit8u attr,Bit8u page);
-
+void INT10_ScrollWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8s nlines,Bit8u attr,Bit8u page);
 
 void INT10_SetActivePage(Bit8u page);
 void INT10_GetFuncStateInformation(PhysPt save);
 
-
 void INT10_SetCursorPos(Bit8u row,Bit8u col,Bit8u page);
 void INT10_TeletypeOutput(Bit8u chr,Bit8u attr,bool showattr, Bit8u page);
 void INT10_ReadCharAttr(Bit16u * result,Bit8u page);