[Solved] Can't enable timer 1.
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  • [Solved] Can't enable timer 1.
  • 23 Feb 2020 06:15:14 pm
  • Last edited by Midnightas on 26 Feb 2020 11:07:10 am; edited 1 time in total

Code:
TMStart:
   ld IX, mpTmrRange
   ld (IX + 0), 0
   ld (IX + 5), $0C ;3277, ~0.1 second.
   ld (IX + 4), $CD

   ld A, (IX + 31)
   res 1, A ;Count down.
   ld (IX + 31), A
   
   ld A, (IX + 30)
   set 1, A ;Crystal mode.
   set 2, A ;Generate interrupt on 0.
   set 0, A ;Enable.
   ld (IX + 30), A

   ret

The above code seems to set all the values correctly, looking at the memory view on CEmu, although F20000 seems to be always zero (as that's what I set it to) and unmoving. It's been a slow day, sorry if this is obvious.
Well, that was.. really dumb. `$F20000 + 30` sure as hell ain't `$F20000 + $30`.
spasm:
Code:
TMStart:
   ld IX, mpTmrRange
   ld (IX + tmr1Counter), 0
   ld (IX + tmr1Load+1), $0C ;3277, ~0.1 second.
   ld (IX + tmr1Load), $CD

   res bTmr1CountUp-8,(IX + tmrCtrl+1)
   
   ld A, (IX + tmrCtrl)
   set bTmr1Crystal, A
   set bTmr1Overflow, A
   set bTmr1Enable, A
   ld (IX + tmrCtrl), A

   ret

fasmg:
Code:
TMStart:
   ld IX, mpTmrRange
   ld (IX + tmr1Counter), 0
   ld (IX + tmr1Load+1), ((1 shl 15) / 10) shr 8
   ld (IX + tmr1Load), ((1 shl 15) / 10) and $FF

   res bTmr1CountUp, (IX + tmrCtrl)
   
   ld A, (IX + tmrCtrl)
   set bTmr1Crystal, A
   set bTmr1Overflow, A
   set bTmr1Enable, A
   ld (IX + tmrCtrl), A

   ret
  
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