mirror of
https://github.com/mupen64plus/mupen64plus-core.git
synced 2024-06-02 19:27:51 -04:00
efdeaf32c7
s/interupt/interrupt/
162 lines
5 KiB
C
162 lines
5 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
* Mupen64plus - vi_controller.c *
|
|
* Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ *
|
|
* Copyright (C) 2014 Bobby Smiles *
|
|
* *
|
|
* 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., *
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
|
|
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
|
|
|
#include "vi_controller.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include "api/m64p_types.h"
|
|
#include "device/memory/memory.h"
|
|
#include "device/r4300/r4300_core.h"
|
|
#include "main/main.h"
|
|
#include "plugin/plugin.h"
|
|
|
|
/* XXX: timing hacks */
|
|
enum { NTSC_VERTICAL_RESOLUTION = 525 };
|
|
|
|
unsigned int vi_clock_from_tv_standard(m64p_system_type tv_standard)
|
|
{
|
|
switch(tv_standard)
|
|
{
|
|
case SYSTEM_PAL:
|
|
return 49656530;
|
|
case SYSTEM_MPAL:
|
|
return 48628316;
|
|
case SYSTEM_NTSC:
|
|
default:
|
|
return 48681812;
|
|
}
|
|
}
|
|
|
|
unsigned int vi_expected_refresh_rate_from_tv_standard(m64p_system_type tv_standard)
|
|
{
|
|
switch (tv_standard)
|
|
{
|
|
case SYSTEM_PAL:
|
|
case SYSTEM_MPAL:
|
|
return 50;
|
|
|
|
case SYSTEM_NTSC:
|
|
default:
|
|
return 60;
|
|
}
|
|
}
|
|
|
|
void init_vi(struct vi_controller* vi, unsigned int clock, unsigned int expected_refresh_rate,
|
|
unsigned int count_per_scanline, unsigned int alternate_timing,
|
|
struct r4300_core* r4300)
|
|
{
|
|
vi->clock = clock;
|
|
vi->expected_refresh_rate = expected_refresh_rate;
|
|
vi->count_per_scanline = count_per_scanline;
|
|
vi->alternate_timing = alternate_timing;
|
|
vi->r4300 = r4300;
|
|
}
|
|
|
|
void poweron_vi(struct vi_controller* vi)
|
|
{
|
|
memset(vi->regs, 0, VI_REGS_COUNT*sizeof(uint32_t));
|
|
vi->field = 0;
|
|
vi->delay = vi->next_vi = 5000;
|
|
}
|
|
|
|
|
|
int read_vi_regs(void* opaque, uint32_t address, uint32_t* value)
|
|
{
|
|
struct vi_controller* vi = (struct vi_controller*)opaque;
|
|
uint32_t reg = vi_reg(address);
|
|
const uint32_t* cp0_regs = r4300_cp0_regs();
|
|
|
|
if (reg == VI_CURRENT_REG)
|
|
{
|
|
/* XXX: update current line number */
|
|
cp0_update_count();
|
|
if (vi->alternate_timing)
|
|
vi->regs[VI_CURRENT_REG] = (vi->delay - (vi->next_vi - cp0_regs[CP0_COUNT_REG])) % (NTSC_VERTICAL_RESOLUTION + 1);
|
|
else
|
|
vi->regs[VI_CURRENT_REG] = (vi->delay - (vi->next_vi - cp0_regs[CP0_COUNT_REG])) / vi->count_per_scanline;
|
|
|
|
/* update current field */
|
|
vi->regs[VI_CURRENT_REG] = (vi->regs[VI_CURRENT_REG] & (~1)) | vi->field;
|
|
}
|
|
|
|
*value = vi->regs[reg];
|
|
|
|
return 0;
|
|
}
|
|
|
|
int write_vi_regs(void* opaque, uint32_t address, uint32_t value, uint32_t mask)
|
|
{
|
|
struct vi_controller* vi = (struct vi_controller*)opaque;
|
|
uint32_t reg = vi_reg(address);
|
|
|
|
switch(reg)
|
|
{
|
|
case VI_STATUS_REG:
|
|
if ((vi->regs[VI_STATUS_REG] & mask) != (value & mask))
|
|
{
|
|
masked_write(&vi->regs[VI_STATUS_REG], value, mask);
|
|
gfx.viStatusChanged();
|
|
}
|
|
return 0;
|
|
|
|
case VI_WIDTH_REG:
|
|
if ((vi->regs[VI_WIDTH_REG] & mask) != (value & mask))
|
|
{
|
|
masked_write(&vi->regs[VI_WIDTH_REG], value, mask);
|
|
gfx.viWidthChanged();
|
|
}
|
|
return 0;
|
|
|
|
case VI_CURRENT_REG:
|
|
clear_rcp_interrupt(vi->r4300, MI_INTR_VI);
|
|
return 0;
|
|
}
|
|
|
|
masked_write(&vi->regs[reg], value, mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void vi_vertical_interrupt_event(struct vi_controller* vi)
|
|
{
|
|
gfx.updateScreen();
|
|
|
|
/* allow main module to do things on VI event */
|
|
new_vi();
|
|
|
|
/* toggle vi field if in interlaced mode */
|
|
vi->field ^= (vi->regs[VI_STATUS_REG] >> 6) & 0x1;
|
|
|
|
/* schedule next vertical interrupt */
|
|
vi->delay = (vi->regs[VI_V_SYNC_REG] == 0)
|
|
? 500000
|
|
: (vi->regs[VI_V_SYNC_REG] + 1) * vi->count_per_scanline;
|
|
|
|
vi->next_vi += vi->delay;
|
|
|
|
add_interrupt_event_count(VI_INT, vi->next_vi);
|
|
|
|
/* trigger interrupt */
|
|
raise_rcp_interrupt(vi->r4300, MI_INTR_VI);
|
|
}
|
|
|