Added support for the shift key in the keyboard driver.

.gitignore

@@ -1,2 +1,3 @@
 obj/
-iso/
+iso/
+kernel.iso

build-number.txt

@@ -0,0 +1 @@
+3

buildnumber.mak

@@ -0,0 +1,11 @@
+# Create an auto-incrementing build number.
+
+BUILD_NUMBER_LDFLAGS  = --defsym __BUILD_DATE=$$(date +'%Y%m%d')
+BUILD_NUMBER_LDFLAGS += --defsym __BUILD_NUMBER=$$(cat $(BUILD_NUMBER_FILE))
+
+# Build number file.  Increment if any object file changes.
+$(BUILD_NUMBER_FILE): $(OBJECTS)
+	if ! test -f build-number.txt; then echo 0 > build-number.txt; fi
+	echo $(($(cat build-number.txt) + 1)) > build-number.txt
+	echo __BUILD_DATE
+	echo __BUILD_NUMBER

include/system.h

@@ -1,6 +1,7 @@
 #ifndef __SYSTEM_H
 #define __SYSTEM_H
-
+/* Primitives */
+typedef enum { false, true } bool;
 /* MAIN.C */
 extern unsigned char *memcpy(unsigned char *dest, const unsigned char *src, int count);
 extern unsigned char *memset(unsigned char *dest, unsigned char val, int count);

src/kb.c

@@ -44,6 +44,9 @@ unsigned char kbdus[128] =
     0,	/* F12 Key */
     0,	/* All other keys are undefined */
 };
+
+bool shift = false;
+
 /* Handles the keyboard interrupt */
 void keyboard_handler(struct regs *r)
 {
@@ -58,13 +61,21 @@ void keyboard_handler(struct regs *r)
     {
         /* You can use this one to see if the user released the
         *  shift, alt, or control keys... */
+		if(scancode == 0xAA || scancode == 0xB6)
+		{
+			shift = false;
+		}
     }
     else
     {
         /* Here, a key was just pressed. Please note that if you
         *  hold a key down, you will get repeated key press
         *  interrupts. */
-
+		if(scancode == 0x2A || scancode == 0x36)
+		{
+			shift = true;
+			return;
+		}
         /* Just to show you how this works, we simply translate
         *  the keyboard scancode into an ASCII value, and then
         *  display it to the screen. You can get creative and
@@ -73,7 +84,12 @@ void keyboard_handler(struct regs *r)
         *  to the above layout to correspond to 'shift' being
         *  held. If shift is held using the larger lookup table,
         *  you would add 128 to the scancode when you look for it */
-        putch(kbdus[scancode]);
+		unsigned char* letter = kbdus[scancode];
+		if(shift)
+		{
+			letter = letter - 32;
+		}
+        putch(letter);
     }
 }
 

src/main.c

@@ -63,8 +63,8 @@ void outportb (unsigned short _port, unsigned char _data)
     __asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
 }
 
-extern char __BUILD_DATE;
-extern char __BUILD_NUMBER;
+//extern char __BUILD_DATE;
+//extern char __BUILD_NUMBER;
 
 /* This is a very simple main() function. All it does is sit in an
 *  infinite loop. This will be like our 'idle' loop */