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The add hl,hl can also be removed if the tables are split with low-byte in one page and high-byte in the otherand changing the &42 to &84.Since there are 512 entries in the anti-log table, you'd need two INC L's. :So the more optimal way would look like this: <pre>FastMult: ld l,c ld h,logtab/256 ld a,(hl) ; a = 32 * log_2(c) ld l,b add (hl) ; cf,a = 32 * log_2(c) + 32 * log_2(b) ld l,a ld a,h adc 1 ld h,a ld e,(hl) inc h inc h ld d,(hl) ; de = 2^((hl)/32) ret</pre> The two low and highbyte antilogtabs have to follow directly after the logtab. -- [[User:Prodatron|Prodatron]] 11:51, 7 May 2007 (CEST) This is all well and good, but the routine is actually quite innacurate. [[User:Executioner|Executioner]] 03:41, 8 May 2007 (CEST)