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Implements most of get_data.

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Thomas Harte 2020-11-26 17:25:27 -05:00
parent f4d13d1f6f
commit cbc0d848ad
1 changed files with 26 additions and 1 deletions
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27
Machines/Apple/AppleIIgs/Sound.cpp
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@ -102,7 +102,32 @@ void GLU::EnsoniqState::set_register(uint16_t address, uint8_t value) {
}
uint8_t GLU::get_data() {
// TODO: all of this. From local_, with just-in-time generation of the data sample, AD values and interrupt status.
const auto address = address_;
if(local_.control & 0x20) {
++address_;
}
switch(address & 0xe0) {
case 0x00: return local_.oscillators[address & 0x1f].velocity & 0xff;
case 0x20: return local_.oscillators[address & 0x1f].velocity >> 8;;
case 0x40: return local_.oscillators[address & 0x1f].volume;
case 0x60: return local_.oscillators[address & 0x1f].sample(local_.ram_); // i.e. look up what the sample was on demand.
case 0x80: return local_.oscillators[address & 0x1f].address;
case 0xa0: return local_.oscillators[address & 0x1f].control;
case 0xc0: return local_.oscillators[address & 0x1f].table_size;
default:
switch(address & 0xff) {
case 0xe0:
/* TODO: generate the actual interrupt state. */
return local_.interrupt_state;
break;
case 0xe1: return uint8_t((local_.oscillator_count - 1) << 1); // TODO: should other bits be 0 or 1?
case 0xe2: return 128; // Input audio. Unimplemented!
}
break;
}
return 0;
}