;******************************************************************************* ; Input: unpacked BCD in tenk:thou:hund:tens:ones ;Output: 16 bit binary in hi:lo ; Size: 35 instructions ;Timing: 3+34+3=40 instruction cycles ; ; Notes: ;1) if input is higher than 65535 output is meaningless ;2) algorithm synopsis: ; ;> dec2bin([1 10 100 1000 1e4], 16) ;ans = ;0000000000000001 ;0000000000001010 ;0000000001100100 ;0000001111101000 ;0010011100010000 ; ;Or coded in three levels ('+' represents +1, '-' represents -1): ;000000000000000+ * ones + ;000000000000+0+0 * tens + ;000000000++00+00 * hund + ;00000+0000-0+000 * thou + ;00+0+00-000+0000 * tenk ; ;bin = (((tens+thou+tenk*256)*2+ ; hund+hund*16+thou*256)*2+ ; tens+hund*16-thou*16+tenk*16*256)*2+ ; ones+tenk*16-tenk*256 ; ;January 22, 2001 by Nikolai Golovchenko ;******************************************************************************* dec2bin16 mov W, tens add W, thou mov lo, W add lo, W mov W, <<tenk mov hi, W mov W, <>hund add W, hund add lo, W mov W, thou add hi, W rl lo rl hi mov W, <>hund add W, tens add lo, W mov W, <>tenk snc or W, #$01 add hi, W mov W, <>thou sub lo, W sc dec hi clc rl lo rl hi mov W, <>tenk add W, ones add lo, W mov W, tenk snc mov W, --tenk sub hi, W retp ;*******************************************************************************
file: /Techref/scenix/lib/math/radix/dec2bin16.htm, 1KB, , updated: 2004/6/10 13:40, local time: 2024/12/3 03:21,
owner: NG--944,
18.97.14.87:LOG IN
|
©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions? <A HREF="http://www.sxlist.com/techref/scenix/lib/math/radix/dec2bin16.htm"> Unpacked BCD to 16 bit binary conversion</A> |
Did you find what you needed? |
Welcome to sxlist.com!sales, advertizing, & kind contributors just like you! Please don't rip/copy (here's why Copies of the site on CD are available at minimal cost. |
Welcome to www.sxlist.com! |
.