diff --git a/src/globals.asm b/src/globals.asm
index d9398c5..3fd860b 100755
--- a/src/globals.asm
+++ b/src/globals.asm
@@ -27,4 +27,5 @@ pub const FB_BYTES_PER_PIXEL = 0x2a       ; U8 Specialisations should hardcode t
 ; Log2 of bytes per pixel
 ; * 0 => 8 bits per pixel
 ; * 2 => 32 bits per pixel
-pub const FB_LOG_BPP         = 0x2b       ; U8 Specialisations should hardcode this
\ No newline at end of file
+pub const FB_LOG_BPP         = 0x2b       ; U8 Specialisations should hardcode this
+pub const FB_MODE            = 0x2c       ; U8 Screen mode: 0 => text; 1 => graphics