From acb0917556fc33681c1df5a530cf754193e67705 Mon Sep 17 00:00:00 2001 From: Andree Buschmann Date: Sun, 7 Aug 2011 20:01:04 +0000 Subject: Submit initial patch from FS#12176. Adds support for several new game music formats (AY, GBS, HES, KSS, SGC, VGM and VGZ) and replaces the current NSF and NSFE with a new implementation based on a port of the Game Music Emu library 'GME'. This first submit does not cover the full functionality provided by the author's original patch: Coleco-SGV is not supported, some GME-specific m3u-support has been removed and IRAM is not used yet. Further changes are very likely to follow this submit. Thanks to Mauricio Garrido. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30264 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libgme/ay_cpu.c | 59 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 apps/codecs/libgme/ay_cpu.c (limited to 'apps/codecs/libgme/ay_cpu.c') diff --git a/apps/codecs/libgme/ay_cpu.c b/apps/codecs/libgme/ay_cpu.c new file mode 100644 index 0000000000..5fbfe7c1ea --- /dev/null +++ b/apps/codecs/libgme/ay_cpu.c @@ -0,0 +1,59 @@ +// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/ + +#include "ay_emu.h" + +#include "blargg_endian.h" +//#include "z80_cpu_log.h" + +/* Copyright (C) 2006-2008 Shay Green. This module is free software; you +can redistribute it and/or modify it under the terms of the GNU Lesser +General Public License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. This +module is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more +details. You should have received a copy of the GNU Lesser General Public +License along with this module; if not, write to the Free Software Foundation, +Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ + +#include "blargg_source.h" + +void cpu_out( struct Ay_Emu* this, cpu_time_t time, addr_t addr, int data ) +{ + if ( (addr & 0xFF) == 0xFE ) + { + check( !cpc_mode ); + this->spectrum_mode = !this->cpc_mode; + + // beeper_mask and last_beeper are 0 if (cpc_mode || !beeper_output) + if ( (data &= this->beeper_mask) != this->last_beeper ) + { + this->last_beeper = data; + int delta = -this->beeper_delta; + this->beeper_delta = delta; + struct Blip_Buffer* bb = this->beeper_output; + Blip_set_modified( bb ); + Synth_offset( &this->apu.synth_, time, delta, bb ); + } + } + else + { + cpu_out_( this, time, addr, data ); + } +} + +#define OUT_PORT( addr, data ) cpu_out( this, TIME(), addr, data ) +#define IN_PORT( addr ) 0xFF // cpu in +#define FLAT_MEM mem + +#define CPU_BEGIN \ +bool run_cpu( struct Ay_Emu* this, cpu_time_t end_time ) \ +{\ + struct Z80_Cpu* cpu = &this->cpu; \ + Z80_set_end_time( cpu, end_time ); \ + byte* const mem = this->mem.ram; // cache + + #include "z80_cpu_run.h" + + return warning; +} -- cgit v1.2.3