Krakout: Poll the quit key (Q)

8DF9: Poll the quit key (Q)

Reads the Q key for the quit handler. That handler uses it both to raise the prompt and to wait for the key's release.

Output
A	1 if the Q key is held, 0 otherwise

poll_quit_key

8DF9

LD BC,KBD_ROW_Q_T

Read the Q-T keyboard half-row and keep the 5 key bits.

8DFC

IN A,(C)

8DFE

AND $1F

8E00

BIT 0,A

Bit 0 is the Q key (0 when pressed).

8E02

Q up: return 0.

8E04

LD A,$01

Q held: report it pressed.

8E06

RET

quit_key_up

8E07

XOR A

Q not held: return 0.

8E08

RET

Routines