XBYTE question

Comments

• cgracey Posts: 14,133

  2018-02-01 10:17

  ozpropdev wrote: »

  cgracey wrote: »

  So, Z = 1 if pins x and y are both low, and C = !C if pin x is high?

  I believe that's what Cluso was looking for.
  

  
  Well, that could be done in two instructions:
  

          test    ina/inb,twobitmask    wz
          testp   onepin                xorc
  

  
  We need to know, for sure, what is needed.
• ozpropdev Posts: 2,791

  2018-02-01 10:35

  cgracey wrote: »

  Well, that could be done in two instructions:
  

          test    ina/inb,twobitmask    wz
          testp   onepin                xorc
  

  
  We need to know, for sure, what is needed.

  Oh yes, the good old faithful TEST instruction.
  I'm way too focused on the new P2 stuff and forgot about the original P1 stuff.
  
• Cluso99 Posts: 18,069

  2018-02-01 20:37

  Sorry, been busy. I need to spend a little more time to rethink if it's possible to replace the 3 instructions, or if it's only possible to replace 2, using a simple instruction. I'd like it to be of general use too.
• TonyB_ Posts: 2,120

  2018-02-02 03:30 edited 2018-10-23 22:00

  deleted