river-raid: Routine at 91E8

91E8: Print player 2 score area or high score on status line.

In 2-player mode, prints player 2's score. In 1-player mode, prints the high score for the current starting bridge.
print_player_2_score_area	91E8	LD A,$01	Open channel 1 (upper screen).
	91EA	CALL $1601	Open channel 1 (upper screen).
	91ED	LD A,$16	AT 1,21
	91EF	RST $10
	91F0	LD A,$01
	91F2	RST $10
	91F3	LD A,$15
	91F5	RST $10
	91F6	LD A,($923A)	If 2-player mode, jump to print_score_player_2 to print player 2 score.
	91F9	BIT 0,A
	91FB	JP NZ,print_score_player_2
	91FE	LD A,$10	INK WHITE
	9200	RST $10
	9201	LD A,$07
	9203	RST $10
	9204	LD BC,$0006	Select high score for current bridge: offset = (game_mode AND $FE) * 3 = bridge_index * 6 (6 bytes per entry). Print 6-digit score.
	9207	LD HL,$90C8
	920A	LD A,($923A)
	920D	AND $FE
	920F	LD E,A
	9210	LD A,($923A)
	9213	AND $FE
	9215	SLA A
	9217	SLA A
	9219	SUB E
	921A	LD D,$00
	921C	LD E,A
	921D	ADD HL,DE
	921E	EX DE,HL
	921F	CALL $203C
	9222	LD A,"0"	Print trailing '0' after score.
	9224	RST $10
	9225	LD A,$16	AT 1,18
	9227	RST $10
	9228	LD A,$01
	922A	RST $10
	922B	LD A,$12
	922D	RST $10
	922E	LD A,"H"	Print "HI" label.
	9230	RST $10
	9231	LD A,"I"
	9233	RST $10
	9234	LD A,$02	Switch to channel 2 (main screen).
	9236	CALL $1601
	9239	RET