mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2024-11-07 05:21:18 +00:00
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
|
/* Communicates with SPC the way the SNES would.
|
||
|
|
||
|
Note: You'll need an "spc_rom.h" file that contains the 64-byte IPL ROM contents */
|
||
|
|
||
|
#include "snes_spc/spc.h"
|
||
|
|
||
|
#include "demo_util.h"
|
||
|
#include <string.h>
|
||
|
#include <stdio.h>
|
||
|
|
||
|
static SNES_SPC* snes_spc;
|
||
|
|
||
|
/* Make port access more convenient. Fakes time by simply incrementing it each call. */
|
||
|
static spc_time_t stime;
|
||
|
static int pread ( int port ) { return spc_read_port( snes_spc, stime++, port ); }
|
||
|
static void pwrite( int port, int data ) { spc_write_port( snes_spc, stime++, port, data ); }
|
||
|
|
||
|
static unsigned char const spc_rom [spc_rom_size] = {
|
||
|
/* ROM data not provided with emulator */
|
||
|
#include "spc_rom.h"
|
||
|
};
|
||
|
|
||
|
int main()
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
/* Data to upload */
|
||
|
static unsigned char const data [4] = "\xFA\xDE\xD1";
|
||
|
unsigned const data_addr = 0xF5; /* second I/O port */
|
||
|
|
||
|
snes_spc = spc_new();
|
||
|
if ( !snes_spc ) error( "Out of memory" );
|
||
|
spc_init_rom( snes_spc, spc_rom );
|
||
|
spc_reset( snes_spc );
|
||
|
|
||
|
/* Simulate reads and writes that SNES code would do */
|
||
|
|
||
|
/* Wait for SPC to be ready */
|
||
|
while ( pread( 0 ) != 0xAA || pread( 1 ) != 0xBB ) { }
|
||
|
|
||
|
/* Start address */
|
||
|
pwrite( 2, data_addr & 0xFF );
|
||
|
pwrite( 3, data_addr >> 8 );
|
||
|
|
||
|
/* Tell SPC to start transfer and wait for acknowledgement */
|
||
|
pwrite( 0, 0xCC );
|
||
|
pwrite( 1, 0x01 );
|
||
|
while ( pread( 0 ) != 0xCC ) { }
|
||
|
|
||
|
/* Send each byte and wait for acknowledgement */
|
||
|
for ( i = 0; i < 4; i++ )
|
||
|
{
|
||
|
printf( "%02X ", data [i] );
|
||
|
pwrite( 1, data [i] );
|
||
|
pwrite( 0, i );
|
||
|
while ( pread( 0 ) != i ) { }
|
||
|
}
|
||
|
printf( "\n" );
|
||
|
|
||
|
/* Verify that data was transferred properly */
|
||
|
for ( i = 0; i < 3; i++ )
|
||
|
printf( "%02X ", pread( i + 1 ) );
|
||
|
printf( "\n" );
|
||
|
|
||
|
printf( "Cycles: %ld\n", (long) stime );
|
||
|
|
||
|
spc_delete( snes_spc );
|
||
|
|
||
|
return 0;
|
||
|
}
|