[hatari-devel] Whip is working

Laurent Sallafranque laurent.sallafranque at free.fr
Thu Feb 11 22:34:28 CET 2010


Hello,

I've just uploaded some more code for the crossbar.

ADC --> DAC direct connexion was missing. It is now correctly taken into 
account.

At least Whip and Audio Fun Machine are now playing sound.
Perhaps some more programs that use direct ADC->DAC connexion are 
working too.

For me, there are still 4 points to code to finish the crossbar emulation:

- increase sound quality

- take into account the "crossbar size of datas" when transfering datas 
from SSI to crossbar.
  (DSP size can be 16bits and crossbar size 8bits, which means that SSI 
acquitment must be active after 2 SSI clocks and the data must be 
partially read the first time) (to keep the correct speed)

- add the sound volume for ADC and DAC. Is there a formula or something 
to add 3db or reduce sound by 3 db or should I just mul (or div) sound 
by a constant ?

- optimize the code (when everything is working well) ;)

Regards

Laurent





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