dreamcast/example/mod.cpp
2025-04-11 14:45:01 -05:00

102 lines
2.9 KiB
C++

#include "aica/aica.hpp"
#include "memorymap.hpp"
#include "sh7091/serial.hpp"
#include "systembus.hpp"
#include "systembus_bits.hpp"
#include "mod/mod.hpp"
#include "mod/getfunk/getfunk.mod.h"
void wait()
{
uint32_t ffst = system.FFST;
while ( ffst::holly_cpu_if_block_internal_write_buffer(ffst)
| ffst::holly_g2_if_block_internal_write_buffer(ffst)
| ffst::aica_internal_write_buffer(ffst)) {
ffst = system.FFST;
};
}
void main()
{
serial::init(0);
const uint8_t * start = reinterpret_cast<uint8_t *>(&_binary_mod_getfunk_getfunk_mod_start);
const uint32_t size = reinterpret_cast<uint32_t>(&_binary_mod_getfunk_getfunk_mod_size);
struct reader r = {
.buf = start,
.length = (int)size,
.ix = 0,
};
struct mod mod;
parse_mod_file(&r, &mod);
serial::string(mod.tag, 4);
serial::integer<uint32_t>(r.ix);
serial::integer<uint32_t>(r.ix);
serial::integer<uint32_t>(r.ix);
// reset ARM
wait(); aica_sound.common.vreg_armrst = aica::vreg_armrst::ARMRST(1);
// disable DSP / ARM / slot access ; enable SH4 access
wait(); aica_sound.common.dmea0_mrwinh = aica::dmea0_mrwinh::MRWINH(0b0111);
volatile uint32_t * slot = reinterpret_cast<volatile uint32_t*>(0xa0700000);
for (uint32_t i = 0; i < (sizeof (struct aica_channel)) * 64 / 4; i++) {
wait(); slot[i] = 0;
}
volatile uint32_t * dsp = reinterpret_cast<volatile uint32_t*>(0xa0700000 + 0x3000);
for (int i = 0; i < 0xb00 / 4; i++) {
wait(); dsp[i] = 0;
}
uint32_t * buf32 = (uint32_t *)&start[r.ix];
struct sample * sample = &mod.samples[0];
uint32_t sample_bytes = sample->length * 2;
for (uint32_t i = 0; i < sample_bytes / 4; i++) {
wait();
while (aica_wave_memory[i] != buf32[i]) {
wait();
aica_wave_memory[i] = buf32[i];
}
}
// disable SH4 access / enable slot access
wait(); aica_sound.common.dmea0_mrwinh = aica::dmea0_mrwinh::MRWINH(0b1101);
wait(); aica_sound.channel[0].KYONB(1);
wait(); aica_sound.channel[0].LPCTL(1);
wait(); aica_sound.channel[0].PCMS(1); // 8-bit pcm
wait(); aica_sound.channel[0].LSA(0);
wait(); aica_sound.channel[0].LEA(sample_bytes);
wait(); aica_sound.channel[0].D2R(0x0);
wait(); aica_sound.channel[0].D1R(0x0);
wait(); aica_sound.channel[0].RR(0x0);
wait(); aica_sound.channel[0].AR(0x1f);
wait(); aica_sound.channel[0].OCT(-2);
wait(); aica_sound.channel[0].FNS(0);
wait(); aica_sound.channel[0].DISDL(0xf);
wait(); aica_sound.channel[0].DIPAN(0x0);
wait(); aica_sound.channel[0].Q(0b00100);
wait(); aica_sound.channel[0].TL(0);
wait(); aica_sound.channel[0].LPOFF(1);
wait(); aica_sound.common.mono_mem8mb_dac18b_ver_mvol =
aica::mono_mem8mb_dac18b_ver_mvol::MONO(0) // enable panpots
| aica::mono_mem8mb_dac18b_ver_mvol::MEM8MB(0) // 16Mbit SDRAM
| aica::mono_mem8mb_dac18b_ver_mvol::DAC18B(0) // 16-bit DAC
| aica::mono_mem8mb_dac18b_ver_mvol::MVOL(0xf) // 15/15 volume
;
wait(); aica_sound.channel[0].KYONEX(1);
while (1);
}