Routines
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9AAD: Multiply DE by A
Used by the routines at DRAW_FOOD and START_AT_LAST_ROW.
Shift and add, eight times. START_AT_LAST_ROW uses it to find the bottom of a sprite, and DRAW_FOOD to move the roast's pointer past the eaten rows.
MULTIPLY 9AAD LD HL,$0000
9AB0 LD B,$08
MULTIPLY_0 9AB2 ADD HL,HL
9AB3 RLCA
9AB4 JR NC,MULTIPLY_1
9AB6 ADD HL,DE
MULTIPLY_1 9AB7 DJNZ MULTIPLY_0
9AB9 RET
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