Routines
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A4F4: Draw explosion debris
Used by the routine at BF66.
A4F4 LD B,$08 Set B to the number of bytes to copy
A4F6 LD A,(DE) Set B to the graphic data byte
A4F7 OR (HL) Blend graphic data of debris with graphic data of room
A4F8 LD (HL),A Copy graphic data to room graphic data buffer
A4F9 INC DE Increment graphic data address
A4FA PUSH DE Save DE
A4FB LD DE,$0020 Increment address room graphic data to the next line
A4FE ADD HL,DE
A4FF POP DE Restore DE
A500 DJNZ $A4F6 Jump back until all bytes copied
A502 RET
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