Routines
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6D30: hl = ABS(hl-de)
Used by the routines at Vector_Main, BlitBmpColumn, Screen_DrawColumn, ActionNathair and ActionOlcWeed.
abs(hl_minus_de) 6D30 AND A
6D31 SBC HL,DE
6D33 RET P
6D34 LD A,L
6D35 CPL
6D36 LD L,A
6D37 LD A,H
6D38 CPL
6D39 LD H,A
6D3A INC HL
6D3B RET
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