Adaptive Micro Systems BetaBrite 1036 Programming Manual page 50

BETA BRITE Programming Manual
Name
[SRF]
[STF]
[WDF]
[WSF]
[SDF]
44
7-HIGH SERIF FONT (= 7 LED pixels high)
[SDF] is a "shadow" font because each letter is composed of two colors
— foreground and shadow — like red and green, amber and red, etc.
Appendixes: Appendix A — Modes, fonts, colors, and graphics available
Example