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z80ctc: Fixed Z80CTC read handler [Tim Schuerewegen]

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side note: given that at write (lines 339-342) the timer is adjusted with (tconst * period) it seems reasonable that at read we divide by period rather than multiplying.
This commit is contained in:
Fabio Priuli 2010-02-17 09:28:52 +00:00
parent 0771a0123a
commit 3a53e7d5dd
1 changed files with 1 additions and 1 deletions
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src/emu/machine/z80ctc.c
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@ -302,7 +302,7 @@ READ8_DEVICE_HANDLER( z80ctc_r )
VPRINTF(("CTC clock %f\n",ATTOSECONDS_TO_HZ(period.attoseconds)));
if (channel->timer != NULL)
return ((int)(attotime_to_double(timer_timeleft(channel->timer)) * attotime_to_double(period)) + 1) & 0xff;
return ((int)(attotime_to_double(timer_timeleft(channel->timer)) / attotime_to_double(period)) + 1) & 0xff;
else
return 0;
}