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Initial commit of zxbox - a ZX Spectrum emulator ported by Anton Romanov. It theoretically runs on all targets, but I have not included it in the Archos builds because it is just too slow to be usable.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10950 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2006-09-15 11:11:16 +00:00
parent 1350d57751
commit 05a7f14f8d
88 changed files with 19624 additions and 0 deletions
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55
apps/plugins/zxbox/sptiming.c Normal file
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/*
* Copyright (C) 1996-1998 Szeredi Miklos 2006 Anton Romanov
* Email: mszeredi@inf.bme.hu
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version. See the file COPYING.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "zxconfig.h"
#include "sptiming.h"
#include "interf.h"
/* not precise but .... anyway this is used only when not playing
* sound ... */
long shouldbe_tick;
void spti_init(void){
spti_reset();
}
void spti_sleep(unsigned long usecs){
/* unsigned long now,need;
now = *rb->current_tick;
need = now + usecs;
rb -> sleep ( need - now );*/
rb->sleep ( usecs );
}
void spti_reset(void){
shouldbe_tick = *rb -> current_tick;
}
void spti_wait(void){
long rem;
long now;
now = *rb -> current_tick;
shouldbe_tick+=SKIPTICKS;
rem = shouldbe_tick - now;
if(rem > 0) {
if(rem > SKIPTICKS) rem = SKIPTICKS;
spti_sleep((unsigned long) rem);
}
if(rem == SKIPTICKS || rem < -10 * SKIPTIME) spti_reset();
}