Routines
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7AE6: Release some mice (if possible)
The address of this routine is placed into 7FD7 by the routine at E225. It releases up to five mice, depending on (a) how many ERIC has caught, and (b) the availability of character buffers 0xC6 and 0xC7 (little boys 9 and 10) and 0xCE-0xD0 (BOY WANDER, ANGELFACE and EINSTEIN).
Input
H 0xD2 (ERIC)
7AE6 LD A,($7FFF) A=leftmost column of the play area on screen
7AE9 CP $90 Is at least half of the girls' skool on-screen?
7AEB RET C Return if not
7AEC LD A,($7FE1) 7FE1 holds the number of mice ERIC has caught
7AEF AND A Has ERIC caught any mice?
7AF0 RET Z Return if not
7AF1 PUSH HL
7AF2 PUSH AF Save the number of captive mice
7AF3 LD L,$02 Collect ERIC's coordinates in DE
7AF5 LD D,(HL)
7AF6 DEC L
7AF7 LD E,(HL)
7AF8 INC E E=x-coordinate of the spot in front of ERIC (if he's facing right)
7AF9 DEC L L=0x00
7AFA BIT 7,(HL) Is ERIC facing right?
7AFC JR NZ,$7B00 Jump if so
7AFE DEC E E=x-coordinate of the spot in front of ERIC (if he's facing left)
7AFF DEC E
7B00 CALL $7B0E Release up to five mice at the spot in front of ERIC
7B03 POP AF A=number of mice ERIC had before trying to release some
7B04 LD HL,$7FE1 7FE1 holds the number of mice ERIC has left
7B07 CP (HL) Set the zero flag if ERIC couldn't release any mice
7B08 LD A,(HL) A=number of mice left in ERIC's pocket
7B09 CALL NZ,$7BC2 Print these in the inventory
7B0C POP HL
7B0D RET
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