Routines
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70E2: Zero B bytes from HL
Used by the routines at START, PARSE_COMMAND, CLEAR_FRAME, CLEAR_PHRASES and MATCH_PATTERN.
CLEAR_BYTES 70E2 XOR A Zero, B times over
CLEAR_BYTES_0 70E3 LD (HL),A
70E4 INC HL
70E5 DJNZ CLEAR_BYTES_0
70E7 RET
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