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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2009 Simon Howard
//
// 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.
//
// 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., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:
// OPL Win9x native interface.
//
//-----------------------------------------------------------------------------
#include "config.h"
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include "opl.h"
#include "opl_internal.h"
#include "opl_timer.h"
static unsigned int opl_port_base;
// MingW?
#if defined(__GNUC__) && defined(__i386__)
static unsigned int OPL_Win9x_PortRead(opl_port_t port)
{
unsigned char result;
__asm__ volatile (
"movl %1, %%edx\n"
"inb %%dx, %%al\n"
"movb %%al, %0"
: "=m" (result)
: "r" (opl_port_base + port)
: "edx", "al", "memory"
);
return result;
}
static void OPL_Win9x_PortWrite(opl_port_t port, unsigned int value)
{
__asm__ volatile (
"movl %0, %%edx\n"
"movb %1, %%al\n"
"outb %%al, %%dx"
:
: "r" (opl_port_base + port), "r" ((unsigned char) value)
: "edx", "al"
);
}
// TODO: MSVC version
// #elif defined(_MSC_VER) && defined(_M_IX6) ...
#else
// Not x86, or don't know how to do port R/W on this compiler.
#define NO_PORT_RW
static unsigned int OPL_Win9x_PortRead(opl_port_t port)
{
return 0;
}
static void OPL_Win9x_PortWrite(opl_port_t port, unsigned int value)
{
}
#endif
static int OPL_Win9x_Init(unsigned int port_base)
{
#ifndef NO_PORT_RW
OSVERSIONINFO version_info;
// Check that this is a Windows 9x series OS:
memset(&version_info, 0, sizeof(version_info));
version_info.dwOSVersionInfoSize = sizeof(version_info);
GetVersionEx(&version_info);
if (version_info.dwPlatformId == 1)
{
opl_port_base = port_base;
// Start callback thread
return OPL_Timer_StartThread();
}
#endif
return 0;
}
static void OPL_Win9x_Shutdown(void)
{
// Stop callback thread
OPL_Timer_StopThread();
}
opl_driver_t opl_win9x_driver =
{
"Win9x",
OPL_Win9x_Init,
OPL_Win9x_Shutdown,
OPL_Win9x_PortRead,
OPL_Win9x_PortWrite,
OPL_Timer_SetCallback,
OPL_Timer_ClearCallbacks,
OPL_Timer_Lock,
OPL_Timer_Unlock,
OPL_Timer_SetPaused
};
#endif /* #ifdef _WIN32 */
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