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/*
* vicii-timing.c - Timing related settings for the MOS 6569 (VIC-II) emulation.
*
* Written by
* Andreas Boose <viceteam@t-online.de>
* Gunnar Ruthenberg <Krill.Plush@gmail.com>
*
* This file is part of VICE, the Versatile Commodore Emulator.
* See README for copyright notice.
*
* 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.
*
*/
#include "vice.h"
#include "c64.h"
#include "machine.h"
#include "resources.h"
#include "vicii-sprites.h"
#include "vicii-timing.h"
#include "vicii.h"
#include "viciitypes.h"
/* Screen constants. */
#define VICII_PAL_SCREEN_HEIGHT 312
#define VICII_NTSC_SCREEN_HEIGHT 263
#define VICII_NTSCOLD_SCREEN_HEIGHT 262
/* Sideborder sizes */
#define VICII_SCREEN_PAL_NORMAL_LEFTBORDERWIDTH 0x20
#define VICII_SCREEN_PAL_NORMAL_RIGHTBORDERWIDTH 0x20
#define VICII_SCREEN_PAL_FULL_LEFTBORDERWIDTH 0x30 /* actually 0x2e, but must be divisible by 8 */
#define VICII_SCREEN_PAL_FULL_RIGHTBORDERWIDTH 0x24
#define VICII_SCREEN_PAL_DEBUG_LEFTBORDERWIDTH 0x88
#define VICII_SCREEN_PAL_DEBUG_RIGHTBORDERWIDTH 0x30
#define VICII_SCREEN_NTSC_NORMAL_LEFTBORDERWIDTH 0x20
#define VICII_SCREEN_NTSC_NORMAL_RIGHTBORDERWIDTH 0x20
#define VICII_SCREEN_NTSC_FULL_LEFTBORDERWIDTH 0x38
#define VICII_SCREEN_NTSC_FULL_RIGHTBORDERWIDTH 0x2c
#define VICII_SCREEN_NTSC_DEBUG_LEFTBORDERWIDTH 0x88
#define VICII_SCREEN_NTSC_DEBUG_RIGHTBORDERWIDTH 0x40
#define VICII_SCREEN_NTSCOLD_NORMAL_LEFTBORDERWIDTH 0x20
#define VICII_SCREEN_NTSCOLD_NORMAL_RIGHTBORDERWIDTH 0x20
#define VICII_SCREEN_NTSCOLD_FULL_LEFTBORDERWIDTH 0x38
#define VICII_SCREEN_NTSCOLD_FULL_RIGHTBORDERWIDTH 0x2c
#define VICII_SCREEN_NTSCOLD_DEBUG_LEFTBORDERWIDTH 0x88
#define VICII_SCREEN_NTSCOLD_DEBUG_RIGHTBORDERWIDTH 0x38
/* Y display ranges */
/* Note: If the last displayed line setting is larger than */
/* the screen height, lines 0+ are displayed in the lower */
/* border. This is used for NTSC display. */
#define VICII_PAL_NORMAL_FIRST_DISPLAYED_LINE 0x10
#define VICII_PAL_NORMAL_LAST_DISPLAYED_LINE 0x11f
#define VICII_PAL_FULL_FIRST_DISPLAYED_LINE 0x08
#define VICII_PAL_FULL_LAST_DISPLAYED_LINE 0x12c
#define VICII_PAL_DEBUG_FIRST_DISPLAYED_LINE 0x00
#define VICII_PAL_DEBUG_LAST_DISPLAYED_LINE 0x137
#define VICII_NTSC_NORMAL_FIRST_DISPLAYED_LINE 0x20
#define VICII_NTSC_NORMAL_LAST_DISPLAYED_LINE 0x102
#define VICII_NTSC_FULL_FIRST_DISPLAYED_LINE 0x1e /* enough space to show full sprites in the upper border */
#define VICII_NTSC_FULL_LAST_DISPLAYED_LINE 0x10f /* enough space to show full sprites in the lower border */
#define VICII_NTSC_DEBUG_FIRST_DISPLAYED_LINE 0x14
#define VICII_NTSC_DEBUG_LAST_DISPLAYED_LINE 0x11a
#define VICII_NTSCOLD_NORMAL_FIRST_DISPLAYED_LINE 0x20
#define VICII_NTSCOLD_NORMAL_LAST_DISPLAYED_LINE 0x102
#define VICII_NTSCOLD_FULL_FIRST_DISPLAYED_LINE 0x1e /* enough space to show full sprites in the upper border */
#define VICII_NTSCOLD_FULL_LAST_DISPLAYED_LINE 0x10f /* enough space to show full sprites in the lower border */
#define VICII_NTSCOLD_DEBUG_FIRST_DISPLAYED_LINE 0x14
#define VICII_NTSCOLD_DEBUG_LAST_DISPLAYED_LINE 0x119
/* Number of cycles per line. */
#define VICII_PAL_CYCLES_PER_LINE C64_PAL_CYCLES_PER_LINE
#define VICII_NTSC_CYCLES_PER_LINE C64_NTSC_CYCLES_PER_LINE
#define VICII_NTSCOLD_CYCLES_PER_LINE C64_NTSCOLD_CYCLES_PER_LINE
/* Cycle # at which sprite DMA is set. */
#define VICII_PAL_SPRITE_FETCH_CYCLE 54
#define VICII_NTSC_SPRITE_FETCH_CYCLE 55
#define VICII_NTSCOLD_SPRITE_FETCH_CYCLE 54
#define VICII_PAL_SPRITE_WRAP_X 504
#define VICII_NTSC_SPRITE_WRAP_X 520
#define VICII_NTSCOLD_SPRITE_WRAP_X 512
/* Cycle # at which the current raster line is re-drawn. It is set to
`VICII_CYCLES_PER_LINE', so this actually happens at the very beginning
(i.e. cycle 0) of the next line. */
#define VICII_PAL_DRAW_CYCLE VICII_PAL_CYCLES_PER_LINE
#define VICII_NTSC_DRAW_CYCLE VICII_NTSC_CYCLES_PER_LINE
#define VICII_NTSCOLD_DRAW_CYCLE VICII_NTSCOLD_CYCLES_PER_LINE
/* Common parameters for all video standards */
#define VICII_25ROW_START_LINE 0x33
#define VICII_25ROW_STOP_LINE 0xfb
#define VICII_24ROW_START_LINE 0x37
#define VICII_24ROW_STOP_LINE 0xf7
/* Bad line range. */
#define VICII_FIRST_DMA_LINE 0x30
#define VICII_LAST_DMA_LINE 0xf7
void vicii_timing_set(machine_timing_t *machine_timing, int border_mode)
{
int mode;
resources_get_int("MachineVideoStandard", &mode);
switch (mode) {
case MACHINE_SYNC_NTSC:
vicii.screen_height = VICII_NTSC_SCREEN_HEIGHT;
switch (border_mode) {
default:
case VICII_NORMAL_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_NTSC_NORMAL_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_NTSC_NORMAL_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_NTSC_NORMAL_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_NTSC_NORMAL_LAST_DISPLAYED_LINE;
break;
case VICII_FULL_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_NTSC_FULL_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_NTSC_FULL_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_NTSC_FULL_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_NTSC_FULL_LAST_DISPLAYED_LINE;
break;
case VICII_DEBUG_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_NTSC_DEBUG_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_NTSC_DEBUG_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_NTSC_DEBUG_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_NTSC_DEBUG_LAST_DISPLAYED_LINE;
break;
}
vicii.cycles_per_line = VICII_NTSC_CYCLES_PER_LINE;
vicii.draw_cycle = VICII_NTSC_DRAW_CYCLE;
vicii.sprite_fetch_cycle = VICII_NTSC_SPRITE_FETCH_CYCLE;
vicii.sprite_wrap_x = VICII_NTSC_SPRITE_WRAP_X;
break;
case MACHINE_SYNC_NTSCOLD:
vicii.screen_height = VICII_NTSCOLD_SCREEN_HEIGHT;
switch (border_mode) {
default:
case VICII_NORMAL_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_NTSCOLD_NORMAL_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_NTSCOLD_NORMAL_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_NTSCOLD_NORMAL_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_NTSCOLD_NORMAL_LAST_DISPLAYED_LINE;
break;
case VICII_FULL_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_NTSCOLD_FULL_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_NTSCOLD_FULL_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_NTSCOLD_FULL_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_NTSCOLD_FULL_LAST_DISPLAYED_LINE;
break;
case VICII_DEBUG_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_NTSCOLD_DEBUG_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_NTSCOLD_DEBUG_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_NTSCOLD_DEBUG_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_NTSCOLD_DEBUG_LAST_DISPLAYED_LINE;
break;
}
vicii.cycles_per_line = VICII_NTSCOLD_CYCLES_PER_LINE;
vicii.draw_cycle = VICII_NTSCOLD_DRAW_CYCLE;
vicii.sprite_fetch_cycle = VICII_NTSCOLD_SPRITE_FETCH_CYCLE;
vicii.sprite_wrap_x = VICII_NTSCOLD_SPRITE_WRAP_X;
break;
case MACHINE_SYNC_PAL:
default:
vicii.screen_height = VICII_PAL_SCREEN_HEIGHT;
switch (border_mode) {
default:
case VICII_NORMAL_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_PAL_NORMAL_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_PAL_NORMAL_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_PAL_NORMAL_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_PAL_NORMAL_LAST_DISPLAYED_LINE;
break;
case VICII_FULL_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_PAL_FULL_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_PAL_FULL_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_PAL_FULL_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_PAL_FULL_LAST_DISPLAYED_LINE;
break;
case VICII_DEBUG_BORDERS:
vicii.screen_leftborderwidth = VICII_SCREEN_PAL_DEBUG_LEFTBORDERWIDTH;
vicii.screen_rightborderwidth = VICII_SCREEN_PAL_DEBUG_RIGHTBORDERWIDTH;
vicii.first_displayed_line = VICII_PAL_DEBUG_FIRST_DISPLAYED_LINE;
vicii.last_displayed_line = VICII_PAL_DEBUG_LAST_DISPLAYED_LINE;
break;
}
vicii.cycles_per_line = VICII_PAL_CYCLES_PER_LINE;
vicii.draw_cycle = VICII_PAL_DRAW_CYCLE;
vicii.sprite_fetch_cycle = VICII_PAL_SPRITE_FETCH_CYCLE;
vicii.sprite_wrap_x = VICII_PAL_SPRITE_WRAP_X;
break;
}
vicii.first_dma_line = VICII_FIRST_DMA_LINE;
vicii.last_dma_line = VICII_LAST_DMA_LINE;
vicii.row_25_start_line = VICII_25ROW_START_LINE;
vicii.row_25_stop_line = VICII_25ROW_STOP_LINE;
vicii.row_24_start_line = VICII_24ROW_START_LINE;
vicii.row_24_stop_line = VICII_24ROW_STOP_LINE;
vicii.raster.display_xstart = VICII_40COL_START_PIXEL;
vicii.raster.display_xstop = VICII_40COL_STOP_PIXEL;
vicii_sprites_init_sprline();
}
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