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5. DMA-Sound
=========
The TT-DMA sound is, as seen by the programmer, 100% identical to
the DMA-sound of the STE. It offers:
-> 6.25, 12.5, 25 or 50 KHz replay rate
-> stereo or mono
-> 8 bit samples
-> National LMC 1992 soundchip to enhance bass/treble etc.
-> Microwire interface to connect to the LMC1992
All adresses and registers are identical to the ones in the STE,
hence i recommend to refer to the STE-FAQ for details on the
DMA-sound subsystem.
Hardware-wise, the TT DMA-sound system is totally different. Since
the STE-Shifter also houses the largest parts of the STE-DMA-sound
system and since the TT does not have the STE-Shifter, the whole
adress generation logic as well as the DMA-sound replay system had
to be put into its own set of chips.
This is, however, invisible to the programmer.
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