Access to CNT register

Comments

• Mark_T Posts: 1,981

  2019-02-15 - 19:12:22

  For prop2, use GETCT instruction. WAITCNT is replaced by WAITCTx and ADDCTx for x=1,2,3

          getct   stime
  
• Rayman Posts: 9,937

  2019-02-15 - 19:16:02

  Hmm... I wonder how the new 64-bit CT register will handle rollover for wait and add...
  
  Guess it works out to be the same as with 32 bit CT register...

  Prop Info and Apps: http://www.rayslogic.com/
• tomcrawford Posts: 1,071

  2019-02-15 - 21:18:18

  Thank you, @Mark_T .

  Re-inventing the wheel is not a waste of time if, when you are done, you understand why it is round.
• Cluso99 Posts: 15,549

  2019-02-16 - 00:21:02

  Rayman wrote: »

  Hmm... I wonder how the new 64-bit CT register will handle rollover for wait and add...
  
  Guess it works out to be the same as with 32 bit CT register...

  
  Same as it does now. The only change is the cnt is extended to 64 bits and you can read the high 32bits. Otherwise those top 32 bits are hidden/unused.

  My Prop boards: P8XBlade2 , RamBlade , CpuBlade , TriBlade
  P1 Prop OS (also see Sphinx, PropDos, PropCmd, Spinix)
  Website: www.clusos.com
  P1: Tools (Index) , Emulators (Index) , ZiCog (Z80)
  P2: Tools & Code , Tricks & Traps