+// Code for communication with ARM940 and control of it.\r
+// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
+\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include <string.h>\r
#include "gp2x.h"\r
#include "emu.h"\r
#include "menu.h"\r
-#include "asmutils.h"\r
#include "mp3.h"\r
+#include "../common/arm_utils.h"\r
+#include "../common/menu.h"\r
#include "../../Pico/PicoInt.h"\r
#include "../../Pico/sound/mix.h"\r
\r
extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r
extern volatile unsigned long *gp2x_memregl;\r
\r
+extern int reset_timing;\r
static unsigned char *shared_mem = 0;\r
static _940_data_t *shared_data = 0;\r
_940_ctl_t *shared_ctl = 0;\r
unsigned char *mp3_mem = 0;\r
\r
-#define MP3_SIZE_MAX (0x1000000 - 4*640*480)\r
+#define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r
+#define CODE940_FILE "pico940.bin"\r
\r
int crashed_940 = 0;\r
\r
\r
\r
/* OPN Mode Register Write */\r
-static void set_timers( int v )\r
+static int set_timers( int v )\r
{\r
+ int change;\r
+\r
/* b7 = CSM MODE */\r
/* b6 = 3 slot mode */\r
/* b5 = reset b */\r
/* b2 = timer enable a */\r
/* b1 = load b */\r
/* b0 = load a */\r
+ change = (ST_mode ^ v) & 0xc0;\r
ST_mode = v;\r
\r
/* reset Timer b flag */\r
/* reset Timer a flag */\r
if( v & 0x10 )\r
ST_status &= ~1;\r
+\r
+ return change;\r
}\r
\r
/* YM2612 write */\r
/* returns 1 if sample affecting state changed */\r
int YM2612Write_940(unsigned int a, unsigned int v)\r
{\r
- int addr; //, ret=1;\r
+ int addr;\r
+ int upd = 1; /* the write affects sample generation */\r
\r
v &= 0xff; /* adjust to 8 bit bus */\r
a &= 3;\r
\r
+ //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
+\r
switch( a ) {\r
case 0: /* address port 0 */\r
+ if (!addr_A1 && ST_address == v)\r
+ return 0; /* address already selected, don't send this command to 940 */\r
ST_address = v;\r
+ /* don't send DAC or timer related address changes to 940 */\r
+ if (!addr_A1 && (v & 0xf0) == 0x20 &&\r
+ (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))\r
+ return 0;\r
addr_A1 = 0;\r
- //ret=0;\r
+ upd = 0;\r
break;\r
\r
case 1: /* data port 0 */\r
}\r
return 0;\r
case 0x27: /* mode, timer control */\r
- set_timers( v );\r
- break; // other side needs ST.mode for 3slot mode\r
+ if (set_timers( v ))\r
+ break; // other side needs ST.mode for 3slot mode\r
+ return 0;\r
case 0x2a: /* DAC data (YM2612) */\r
dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r
return 0;\r
case 0x2b: /* DAC Sel (YM2612) */\r
/* b7 = dac enable */\r
dacen = v & 0x80;\r
+ upd = 0;\r
break; // other side has to know this\r
default:\r
break;\r
break;\r
\r
case 2: /* address port 1 */\r
+ if (addr_A1 && ST_address == v)\r
+ return 0;\r
ST_address = v;\r
addr_A1 = 1;\r
- //ret=0;\r
+ upd = 0;\r
break;\r
\r
case 3: /* data port 1 */\r
break;\r
}\r
\r
+ //printf("ym pass\n");\r
+\r
if(currentConfig.EmuOpt & 4) {\r
- /* queue this write for 940 */\r
- if (writebuff_ptr < 2047) {\r
- if (shared_ctl->writebuffsel == 1) {\r
- shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;\r
- } else {\r
- shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;\r
+ UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
+\r
+ /* detect rapid ym updates */\r
+ if (upd && !(writebuff_ptr & 0x80000000) && Pico.m.scanline < 224) {\r
+ int mid = Pico.m.pal ? 68 : 93;\r
+ if (Pico.m.scanline > mid) {\r
+ //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, Pico.m.scanline);\r
+ writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
+ writebuff_ptr |= 0x80000000;\r
+ //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, Pico.m.scanline, addr, v, upd);\r
}\r
+ }\r
+\r
+ /* queue this write for 940 */\r
+ if ((writebuff_ptr&0xffff) < 2047) {\r
+ writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r
} else {\r
- printf("warning: writebuff_ptr > 2047\n");\r
+ printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
}\r
}\r
\r
gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
\r
- strcpy(menuErrorMsg, "940 crashed.");\r
+ strcpy(menuErrorMsg, "940 crashed, too much overclock?");\r
engineState = PGS_Menu;\r
crashed_940 = 1;\r
}\r
{\r
int i, old_A1 = addr_A1;\r
\r
+ /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
+ add_job_940(JOB940_PICOSTATELOAD);\r
+ if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
+\r
+ writebuff_ptr = 0;\r
+\r
// feed all the registers and update internal state\r
for(i = 0; i < 0x100; i++) {\r
YM2612Write_940(0, i);\r
}\r
\r
addr_A1 = old_A1;\r
-\r
- add_job_940(JOB940_PICOSTATELOAD);\r
}\r
\r
\r
shared_data = (_940_data_t *) (shared_mem+0x100000);\r
/* this area must not get buffered on either side */\r
shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
- mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);\r
+ mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
if (mp3_mem == MAP_FAILED)\r
{\r
printf("mmap(mp3_mem) failed with %i\n", errno);\r
binpath[1023] = 0;\r
for (i = strlen(binpath); i > 0; i--)\r
if (binpath[i] == '/') { binpath[i] = 0; break; }\r
- strcat(binpath, "/code940.bin");\r
+ strcat(binpath, "/" CODE940_FILE);\r
\r
fp = fopen(binpath, "rb");\r
if(!fp)\r
{\r
- memset(gp2x_screen, 0, 320*240);\r
- gp2x_text_out8(10, 100, "failed to open required file:");\r
- gp2x_text_out8(10, 110, "code940.bin");\r
- gp2x_video_flip();\r
+ memset(gp2x_screen, 0, 320*240*2);\r
+ text_out16(10, 100, "failed to open required file:");\r
+ text_out16(10, 110, CODE940_FILE);\r
+ gp2x_video_flip2();\r
printf("failed to open %s\n", binpath);\r
exit(1);\r
}\r
else memset32(buffer, 0, length<<stereo);\r
\r
if (shared_ctl->writebuffsel == 1) {\r
- shared_ctl->writebuff0[writebuff_ptr] = 0xffff;\r
+ shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
} else {\r
- shared_ctl->writebuff1[writebuff_ptr] = 0xffff;\r
+ shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
}\r
writebuff_ptr = 0;\r
\r
\r
if (loaded_mp3 != f)\r
{\r
- // printf("loading mp3... "); fflush(stdout);\r
+ if (PicoMessage != NULL)\r
+ {\r
+ fseek(f, 0, SEEK_END);\r
+ if (ftell(f) > 2*1024*1024)\r
+ PicoMessage("Loading MP3...");\r
+ }\r
fseek(f, 0, SEEK_SET);\r
fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
- // if (feof(f)) printf("done.\n");\r
- // else printf("done. mp3 too large, not all data loaded.\n");\r
+ if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
shared_ctl->mp3_len = ftell(f);\r
loaded_mp3 = f;\r
\r
if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
add_job_940(JOB940_INVALIDATE_DCACHE);\r
}\r
+ reset_timing = 1;\r
}\r
\r
// seek..\r
notaz.gp2x.de / libpicofe.git / blobdiff