Proper backspace support

Makefile

@@ -76,7 +76,6 @@ QEMU_FLAGS = -machine q35 \
              -drive if=pflash,format=raw,file=$(BUILD_DIR)/OVMF_VARS.fd \
              -drive format=raw,file=fat:rw:$(BUILD_DIR) \
              -net none \
-             -nographic \
 			 -no-reboot
 
 # Phony targets

kernel.c

@@ -93,8 +93,8 @@ void kmain(BootInfo *Boot)
             // Reset for next command
             len = 0;
             SAFE_PRINT(Boot, L"-> ");
-        } else if (Key.UnicodeChar == L'\b' || Key.UnicodeChar == 0x7F) {
-            // Backspace
+        } else if (Key.ScanCode == 0x08 || Key.UnicodeChar == L'\b' || Key.UnicodeChar == 0x7F) {
+            // Backspace (ScanCode 0x08 is backspace in UEFI)
             if (len > 0) {
                 len--;
                 SAFE_PRINT(Boot, L"\b \b");