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l7a1045_l6028_dsp_a.cpp: misc notes

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Angelo Salese 2023-02-26 23:19:51 +01:00 committed by GitHub
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commit d03ee1640f
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1 changed files with 9 additions and 5 deletions
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14
src/devices/sound/l7a1045_l6028_dsp_a.cpp
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@ -77,14 +77,15 @@
TODO:
- Sample format needs to be double checked;
- Octave Control/BPM/Pitch, xrally Network BGM wants 66150 Hz which is definitely too fast for most fatfurwa samples.
- Key Off, non-loop samples repeats;
- Octave Control/BPM/Pitch, xrally Network BGM wants 66150 Hz which is definitely too fast for
most fatfurwa samples;
- Key Off for looping samples (fatfurwa should stop all samples when user insert a credit,
cfr. reg[0] readback);
- Most non-looping samples are setup to repeat twice on different channels (cfr. fatfurwa);
- Fix relative sample end positions (non-loop);
- ADSR (registers 2 & 4?);
- How DMA really works?
- fatfurwa: should stop all samples when user insert a credit,
is there a full key off/reset mechanism trigger?
**************************************************************************************************/
#include "emu.h"
@ -347,6 +348,9 @@ uint16_t l7a1045_sound_device::sound_data_r(offs_t offset)
uint32_t current_addr;
uint16_t res;
// TODO: fatfurwa reads offset == 2, ANDs with 0xf and compares against a sample buffer value if it's bigger, smaller or equal
// Returning 0xffff here for looping samples and they will silence out when user insert a coin ...
current_addr = vptr->start + vptr->pos;
if(offset == 0)
res = (current_addr & 0xf) << 12; // TODO: frac