Bob Ammerman of RAm Systems says:
In the 18C you could handle literal strings like this:rcall display_it ...store the characters in memory right here... ...next instruction to execute... display_it: movff tosl,tblptrl movff tosh,tblptrh movff tosu,tblptru ; can omit when we know tblptru is 0 and we have <= 64K of memory ... process the characters, incrementing TBLPTR as you go (TBLRD*+)... btfsc tblptrl,0 ; make sure we handled an even number of chars tblrd*+ ; do dummy read to align on even character position movf tblptrl,W,A movwf tosl,A movf tblptrh,W,A movwf tosh,A movf tblptru,W,A ; can omit when we have ... movwf tosu,A ; .. <= 64K of memory return
Note that LFSR is broken on some 18C chips! Using it causes random (ie: unpredicted) changes to RAM.
|file: /Techref/microchip/18c/tables.htm, 1KB, , updated: 2001/4/17 12:57, local time: 2020/4/2 05:43,
|©2020 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://techref.massmind.org/techref/microchip/18c/tables.htm"> PIC Microcontoller Memory Method 18C Literal String Tables</A>
|Did you find what you needed?|
Welcome to massmind.org!
Welcome to techref.massmind.org!