Pentagram: Routine at B519

B519: HL = HL + A

Used by the routines at FIND_SPRITE, BUILD_ROOM and PLAY_NOTE.

A is treated as unsigned. A is left holding H.

Input
HL	a number
A	what to add

ADD_HL_A

B519

ADD A,L

B51A

LD L,A

B51B

LD A,H

B51C

ADC A,$00

B51E

LD H,A

B51F

RET