• DEFINE directive in A251
    Hello dear colleagues! I was download Ñ251 Version 3.60 Evaluation Software. I have a problem: compiler message is "UNKNOWN CONTROL" DEFINE directive in A251 SAMPLE.ASM DEFINE (check, NoExtRam). Would...
  • Direct bit I/O
    I have a bit-addressable var (ibase) that I am loading with a value and then rotating--placing the msb on an I/O pin (SData). The SData pin never changes--it stays high. What am I doing wrong? Thanks...
  • Assembler Directive for Segment Length used
    Hi Is there a Assembler directive to calculate or indicate the used space in a Segment? I want to clear a portion of RAM which contains x amount of variables. I know that I can read the length...
  • memory
    Hello I Always used Atmel AT89C51RE2 but there the production stopped we changed over to Silicon C8051F580 processor. now I am facing problems with the memory. when I add variables after downloading...
  • Memory management
    I used 64k external code memory and 64k external data memory So in assembly we will can use movc and movx instruction to access code and data memory but how can we access code and data memory using C...