void loadkernel(){
Init8259();
Setinterrupt(0x26,FloppyIntHandler);
Setinterrupt(0x2e,HdIntHandler);
outp(0x21,inp(0x21)&0xfb); //允许从片中断
outp(0xa1,inp(0xa1)&0xbf); //开启硬盘中断
sti();
initfs();
filedes file;
if(file_open(&file,"chouryos",O_RDWR)<0){
putstring("Can't find kernel!\n");
}else{
file_read(&file,(void *)KernelLocation,0xffffffff);
file_close(&file);
kernel();
}
}
static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
{
void *oldpile;
unsigned long buffer;
unsigned char mode;
/* Set replay tracks */
if (cookie_snd & SND_16BIT) {
Settracks(0,0);
Setmontracks(0);
}
oldpile=(void *)Super(0);
/* Stop currently playing sound */
DMAAUDIO_IO.control=0;
/* Set buffer */
buffer = (unsigned long) SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
DMAAUDIO_IO.start_high = (buffer>>16) & 255;
DMAAUDIO_IO.start_mid = (buffer>>8) & 255;
DMAAUDIO_IO.start_low = buffer & 255;
buffer += SDL_MintAudio_audiosize;
DMAAUDIO_IO.end_high = (buffer>>16) & 255;
DMAAUDIO_IO.end_mid = (buffer>>8) & 255;
DMAAUDIO_IO.end_low = buffer & 255;
mode = 3-MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
if (spec->channels==1) {
mode |= 1<<7;
}
DMAAUDIO_IO.sound_ctrl = mode;
/* Set interrupt */
Jdisint(MFP_DMASOUND);
Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
Jenabint(MFP_DMASOUND);
if (cookie_snd & SND_16BIT) {
if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
}
}
/* Go */
DMAAUDIO_IO.control = 3; /* playback + repeat */
Super(oldpile);
}
static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
{
int channels_mode, prediv;
void *buffer;
SDL_MintAudio_quit_thread = SDL_FALSE;
SDL_MintAudio_thread_finished = SDL_TRUE;
SDL_MintAudio_WaitThread();
Buffoper(0);
Settracks(0,0);
Setmontracks(0);
channels_mode=STEREO16;
switch (spec->format & 0xff) {
case 8:
if (spec->channels==2) {
channels_mode=STEREO8;
} else {
channels_mode=MONO8;
}
break;
}
if (Setmode(channels_mode)<0) {
DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
}
prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
Gpio(GPIO_SET,7);
Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
Devconnect2(DMAPLAY, DAC|EXTOUT, CLKEXT, prediv);
} else {
Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
}
buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
if (Setbuffer(0, buffer, buffer + spec->size)<0) {
DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
}
if (SDL_MintAudio_mint_present) {
SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
} else {
Jdisint(MFP_DMASOUND);
Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
Jenabint(MFP_DMASOUND);
if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
}
}
Buffoper(SB_PLA_ENA|SB_PLA_RPT);
DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
}
static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
{
int channels_mode, dmaclock, prediv;
void *buffer;
/* Stop currently playing sound */
SDL_MintAudio_quit_thread = SDL_FALSE;
SDL_MintAudio_thread_finished = SDL_TRUE;
SDL_MintAudio_WaitThread();
Buffoper(0);
/* Set replay tracks */
Settracks(0,0);
Setmontracks(0);
/* Select replay format */
channels_mode=STEREO16;
switch (spec->format & 0xff) {
case 8:
if (spec->channels==2) {
channels_mode=STEREO8;
} else {
channels_mode=MONO8;
}
break;
}
if (Setmode(channels_mode)<0) {
DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
}
dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
Gpio(GPIO_SET,7); /* DSP port gpio outputs */
Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
Devconnect2(DMAPLAY, DAC|EXTOUT, CLKEXT, prediv);
} else {
Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
}
/* Set buffer */
buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
if (Setbuffer(0, buffer, buffer + spec->size)<0) {
DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
}
if (SDL_MintAudio_mint_present) {
SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
} else {
/* Install interrupt */
Jdisint(MFP_DMASOUND);
/*Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);*/
Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
Jenabint(MFP_DMASOUND);
if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
}
}
/* Go */
Buffoper(SB_PLA_ENA|SB_PLA_RPT);
DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
}