Routines
Prev: EE8D Up: Map Next: EEDD
EE8F: Check for food pickup by Wally.
Used by the routine at Game_Start.
Input
Output
Food_CheckPickup EE8F LD HL,(Food_ActivePtr) Get pointer to first active food.
EE92 LD A,(Wally_RoomNo) See if Wally is in the same room as the active food A.
EE95 CP (HL)
EE96 JR Z,Food_CheckPickup_0
EE98 LD DE,$0016 If not, check for active food B.
EE9B ADD HL,DE
EE9C CP (HL)
EE9D RET NZ
Food found.
Food_CheckPickup_0 EE9E INC HL
EE9F LD A,(Wally_X) Check to see if Wally is on the same X plane as the food.
EEA2 SUB (HL)
EEA3 SUB $01
EEA5 CP $FE
EEA7 RET C
EEA8 LD A,(Wally_Y) Make sure he is also on the same Y position, which is fixed to $98.
EEAB CP $98
EEAD RET NZ
EEAE LD E,(HL) Get the X position again and set for drawing.
EEAF INC HL
EEB0 LD D,$A8
EEB2 LD (BitmapX),DE
EEB6 LD A,(HL) Get the bitmap index.
EEB7 CALL Bitmap16Draw Draw 'over' the existing bitmap which will erase it from the screen.
EEBA LD HL,(Food_ActivePtr) Set the next food in line as active, to replace the one just eaten.
EEBD INC HL
EEBE INC HL
EEBF INC HL
EEC0 LD A,(HL)
EEC1 CP $FF Check for end of group, if so wrap around to start of table again.
EEC3 JR NZ,Food_CheckPickup_1
EEC5 LD HL,Food_Table
Food_CheckPickup_1 EEC8 LD (Food_ActivePtr),HL Store address for next time.
EECB LD B,$0A Increase Wally's energy by 10 and update the Milk Glass.
EECD CALL Wally_EnergyIncBy
EED0 LD BC,$643C
EED3 LD DE,$0128
EED6 LD HL,$0103
EED9 CALL Beep_Effect
EEDC RET
Prev: EE8D Up: Map Next: EEDD