Pyjamarama: Routine at AD81

AD81: Checks to see if Wally should turn his head towards the camera.

Used by the routine at Wally_Move.

Input
A	Current frame to test against.

Output

Wally_TurnHead

AD81

PUSH AF

AD82

CP $00

Only allow head turning on certain frames.

AD84

JR Z,Wally_TurnHead_2

AD86

CP $10

AD88

JR Z,Wally_TurnHead_2

AD8A

CP $0C

Clear head turn on certain frames.

AD8C

JR Z,Wally_TurnHead_0

AD8E

CP $1C

AD90

JR Z,Wally_TurnHead_0

AD92

LD A,(Wally_HeadCountdown)

If counter is greater than zero, skip onto just counting down.

AD95

OR A

AD96

JR NZ,Wally_TurnHead_3

AD98

JR Wally_TurnHead_1

Wally_TurnHead_0

AD9A

LD A,(Wally_HeadCountdown)

If counter is greater than zero, skip onto just counting down.

AD9D

OR A

AD9E

JR NZ,Wally_TurnHead_3

ADA0

LD (Wally_HeadTurned),A

Clear Wally's head turn flag(2).

ADA3

LD A,R

Set a random value (0 ~ 1F) into countdown.

ADA5

AND $1F

ADA7

LD (Wally_HeadCountdown),A

Wally_TurnHead_1

ADAA

POP AF

ADAB

RET

Wally_TurnHead_2

ADAC

LD A,(Wally_HeadCountdown)

If counter is greater than zero, skip onto just counting down.

ADAF

OR A

ADB0

JR NZ,Wally_TurnHead_3

ADB2

INC A

Set Wall'ys head turn flag(2)

ADB3

LD (Wally_HeadTurned),A

ADB6

JR Wally_TurnHead_1

Wally_TurnHead_3

ADB8

DEC A

ADB9

LD (Wally_HeadCountdown),A

ADBC

JR Wally_TurnHead_1