_tgi_color: .res 1 ; Current drawing color
_tgi_font: .res 1 ; Which font to use
_tgi_textdir: .res 1 ; Current text direction
+_tgi_vectorfont: .res 2 ; Pointer to vector font
; The following two store an 8.8 fixed point value in the first two bytes,
; and a rounded integer value in the third byte. The latter is passed to the
; driver to scale the bitmap font. The variables are expected to be in