Die Ausgänge sind im asm File beschrieben:

; IO Definitions...
; Port C used for video output stuff. Only B/W no gray.
; Bit 7 - Video
; Port D used for sync output stuff.
; Bit 6 - Video
;
; This is the video output circuit...
;
; 560
; ---bit 7 port C------/\/\/\------+
; 1200 |
; ---bit 6 port D------/\/\/\------+------video out
; 100 |
; ---GND---------------/\/\/\------+