This display has a little program in Integer BASIC. Apple 1 & ][ had the Integer BASIC interpreter in ROM.
The display is a B&W TV driven through its antenna input & tuner (Ch 3 or 4) via a RF adapter.
FWIW, the Apple ]['s "Language Card" (with its own slot, in addition to the main buss's 8 slots) had room for 48K of RAM so the user could bring the machine's 16K up to a whopping 64K (that's KILObytes) of RAM.
It also had a ROM with the "Applesoft" floating point BASIC interpreter (written, IIRC, by a guy who went on to sell a bit more software with the "-soft" suffix...)