X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Fdrv%2Fvterm.c;h=bf518c5027af4e603f4f32f744e3333653180874;hb=a82db23f8f051c7095f41e2503a77d7844a95964;hp=e3e78132add707cdc9122dfbd1e6830e0fdc6c77;hpb=73cd7e192fd21be9366b7368126dec86a6026800;p=tpg%2Facess2.git

diff --git a/Kernel/drv/vterm.c b/Kernel/drv/vterm.c
index e3e78132..bf518c50 100644
--- a/Kernel/drv/vterm.c
+++ b/Kernel/drv/vterm.c
@@ -10,7 +10,7 @@
 // === CONSTANTS ===
 #define	NUM_VTS	4
 #define MAX_INPUT_CHARS	64
-#define VT_SCROLLBACK	4	// 4 Screens of text
+#define VT_SCROLLBACK	1	// 4 Screens of text
 #define DEFAULT_OUTPUT	"/Devices/VGA"
 #define DEFAULT_INPUT	"/Devices/PS2Keyboard"
 #define	DEFAULT_WIDTH	80
@@ -88,6 +88,7 @@ char	*gsVT_InputDevice = NULL;
 // === CODE ===
 /**
  * \fn int VT_Install(char **Arguments)
+ * \brief Installs the Virtual Terminal Driver
  */
 int VT_Install(char **Arguments)
 {
@@ -144,8 +145,8 @@ int VT_Install(char **Arguments)
 		gVT_Terminals[i].WritePos = 0;
 		gVT_Terminals[i].ViewPos = 0;
 		
-		gVT_Terminals[i].Buffer = malloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*sizeof(tVT_Char) );
-		memset( gVT_Terminals[i].Buffer, 0, DEFAULT_WIDTH*DEFAULT_HEIGHT*sizeof(tVT_Char) );
+		gVT_Terminals[i].Buffer = malloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK*sizeof(tVT_Char) );
+		memset( gVT_Terminals[i].Buffer, 0, DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK*sizeof(tVT_Char) );
 		
 		gVT_Terminals[i].Name[0] = '0'+i;
 		gVT_Terminals[i].Name[1] = '\0';
@@ -355,6 +356,22 @@ void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 	}
 }
 
+/**
+ * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
+ * \brief Clears a line in a virtual terminal
+ */
+void VT_int_ClearLine(tVTerm *Term, int Num)
+{
+	 int	i;
+	ENTER("pTerm iNum", Term, Num);
+	for( i = Term->Width; i++; )
+	{
+		Term->Text[ Num*Term->Width + i ].Ch = 0;
+		Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
+	}
+	LEAVE('-');
+}
+
 /**
  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
  * \brief Parses a VT100 Escape code
@@ -393,10 +410,17 @@ int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 			//Clear By Line
 			case 'J':
 				// Clear Screen
-				if(args[0] == 2) {
-					memset(Term->Text, 0, Term->Width*Term->Height*VT_SCROLLBACK*sizeof(tVT_Char));
+				switch(args[0])
+				{
+				case 2:
+					{
+					 int	i = Term->Height * VT_SCROLLBACK;
+					while( i-- )	VT_int_ClearLine(Term, i);
 					Term->WritePos = 0;
 					Term->ViewPos = 0;
+					VT_int_UpdateScreen(Term, 1);
+					}
+					break;
 				}
 				break;
 			// Set Font flags
@@ -489,7 +513,9 @@ void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 		Term->WritePos ++;
 		break;
 	}
+		
 	
+	// Move Screen
 	if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 	{
 		 int	base, i;
@@ -504,7 +530,11 @@ void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 		base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 		
 		// Scroll Back
-		memcpy( Term->Text, &Term->Text[Term->Width], base*sizeof(tVT_Char) );
+		memcpy(
+			Term->Text,
+			&Term->Text[Term->Width],
+			Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
+			);
 		
 		// Clear last row
 		for( i = 0; i < Term->Width; i ++ )
@@ -515,6 +545,11 @@ void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 		
 		VT_int_UpdateScreen( Term, 1 );
 	}
+	else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
+	{
+		Term->ViewPos += Term->Width;
+		VT_int_UpdateScreen( Term, 1 );
+	}
 	else
 		VT_int_UpdateScreen( Term, 0 );