/* Eolith Speedup Handling */ /* This uses triggers and a scanline counter to speed up the eolith games a bit in some cases this results in a 100% speedup e.g hidden catch 25% -> 50% speed ingame this could probably be done a bit better using timers */ #include "emu.h" #include "includes/eolithsp.h" static int eolith_speedup_address; static int eolith_speedup_resume_scanline; static int eolith_vblank = 0; static int eolith_scanline = 0; void eolith_speedup_read(address_space *space) { /* for debug */ //if ((cpu_get_pc(&space->device())!=eolith_speedup_address) && (eolith_vblank!=1) ) // printf("%s:eolith speedup_read data %02x\n",space->machine().describe_context(), eolith_vblank); if (cpu_get_pc(&space->device())==eolith_speedup_address && eolith_vblank==0 && eolith_scanline < eolith_speedup_resume_scanline) { device_spin_until_trigger(&space->device(), 1000); } } static const struct { const char *s_name; UINT32 speedup_address; int speedup_resume_scanline; } eolith_speedup_table[] = { /* eolith.c */ { "ironfort", 0x40020854, 240 }, { "hidnctch", 0x4000bba0, 240 }, { "raccoon", 0x40008204, 240 }, { "puzzlekg", 0x40029458, 240 }, { "hidctch2", 0x40009524, 240 }, { "hidctch2a",0x40029B58, 240 }, { "landbrk", 0x40023574, 240 }, { "landbrka", 0x4002446c, 240 }, { "nhidctch", 0x40012778, 240 }, { "hidctch3", 0x4001f6a0, 240 }, { "fort2b", 0x000081e0, 240 }, { "fort2ba", 0x000081e0, 240 }, { "penfan", 0x4001FA66, 240 }, { "candy", 0x4001990C, 240 }, /* eolith16.c */ { "klondkp", 0x0001a046, 240 }, /* vegaeo.c */ { "crazywar", 0x00008cf8, 240 }, { NULL, 0, 0 } }; void init_eolith_speedup(running_machine &machine) { int n_game = 0; eolith_speedup_address = 0; eolith_speedup_resume_scanline = 0; while( eolith_speedup_table[ n_game ].s_name != NULL ) { if( strcmp( machine.system().name, eolith_speedup_table[ n_game ].s_name ) == 0 ) { eolith_speedup_address = eolith_speedup_table[ n_game ].speedup_address; eolith_speedup_resume_scanline = eolith_speedup_table[ n_game ].speedup_resume_scanline; } n_game++; } } /* todo, use timers instead! */ TIMER_DEVICE_CALLBACK( eolith_speedup ) { if (param==0) { eolith_vblank = 0; } if (param==eolith_speedup_resume_scanline) { timer.machine().scheduler().trigger(1000); } if (param==240) { eolith_vblank = 1; } } CUSTOM_INPUT( eolith_speedup_getvblank ) { return (field.machine().primary_screen->vpos() >= 240); }