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Attempt to avoid off-by-one buffer reads, add modulation.

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This commit is contained in:
Thomas Harte 2021-12-06 19:28:40 -05:00
parent 066e4421e8
commit 2b0415d552
1 changed files with 11 additions and 4 deletions
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15
Machines/Amiga/Audio.cpp
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@ -96,14 +96,17 @@ bool Audio::advance_dma(int channel) {
return false;
}
set_data<false>(channel, ram_[channels_[channel].data_address & ram_mask_]);
++channels_[channel].data_address;
if(channels_[channel].should_reload_address) {
channels_[channel].data_address = pointer_[size_t(channel)];
channels_[channel].should_reload_address = false;
}
set_data<false>(channel, ram_[channels_[channel].data_address & ram_mask_]);
if(channels_[channel].state != Channel::State::WaitingForDummyDMA) {
++channels_[channel].data_address;
}
return true;
}
@ -268,7 +271,7 @@ void Audio::output() {
-> State::PlayingHigh (010)
if: perfin and (AUDxON or not AUDxIP)
action:
1. pbufld
1. pbufld1
2. percntrld
3. if napnav and AUDxON, then AUDxDR
4. if napnav and AUDxON and intreq2, AUDxIR
@ -371,6 +374,7 @@ template <> bool Audio::Channel::transit<
// pbufld1
data_latch = data;
wants_data = true;
if(moduland && attach_volume) moduland->volume = uint8_t(data_latch);
// AUDxIR.
return true;
@ -463,6 +467,7 @@ template <> bool Audio::Channel::transit<
// pbufld1
data_latch = data;
if(moduland && attach_volume) moduland->volume = uint8_t(data_latch);
// if napnav
if(attach_volume || !(attach_volume || attach_period)) {
@ -518,6 +523,7 @@ template <> bool Audio::Channel::transit<
if(attach_period) {
// pbufld2
data_latch = data;
if(moduland) moduland->period = data_latch;
// [if AUDxAP] and AUDxON
if(dma_enabled) {
@ -596,6 +602,7 @@ template <> bool Audio::Channel::transit<
// pbufld1
data_latch = data;
if(moduland && attach_volume) moduland->volume = uint8_t(data_latch);
// if napnav
if(attach_volume || !(attach_volume || attach_period)) {