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[SNES]: Hooked up interlace mode

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This commit is contained in:
Angelo Salese 2009-08-09 21:37:56 +00:00
parent 5015eefafa
commit 61594c329d
1 changed files with 32 additions and 24 deletions
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56
src/mame/machine/snes.c
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@ -39,6 +39,7 @@ static emu_timer *snes_hblank_timer;
static emu_timer *snes_nmi_timer;
static emu_timer *snes_hirq_timer;
static UINT16 hblank_offset;
static UINT8 snes_interlace; //doubles the visible resolution
UINT16 snes_htmult; /* in 512 wide, we run HTOTAL double and halve it on latching */
UINT8 snes_has_addon_chip;
@ -279,6 +280,31 @@ static TIMER_CALLBACK( snes_hblank_tick )
*************************************/
static void snes_dynamic_res_change(running_machine *machine)
{
rectangle visarea = *video_screen_get_visible_area(machine->primary_screen);
visarea.min_x = visarea.min_y = 0;
visarea.max_y = snes_ppu.beam.last_visible_line*snes_interlace - 1;
// fixme: should compensate for SNES_DBG_video
if( snes_ppu.mode == 5 || snes_ppu.mode == 6 )
{
visarea.max_x = (SNES_SCR_WIDTH * 2) - 1;
snes_htmult = 2;
}
else
{
visarea.max_x = SNES_SCR_WIDTH - 1;
snes_htmult = 1;
}
if ((snes_ram[STAT78] & 0x10) == SNES_NTSC)
video_screen_configure(machine->primary_screen, SNES_HTOTAL*snes_htmult, SNES_VTOTAL_NTSC*snes_interlace, &visarea, video_screen_get_frame_period(machine->primary_screen).attoseconds);
else
video_screen_configure(machine->primary_screen, SNES_HTOTAL*snes_htmult, SNES_VTOTAL_PAL*snes_interlace, &visarea, video_screen_get_frame_period(machine->primary_screen).attoseconds);
}
static READ8_HANDLER( snes_open_bus_r )
{
static UINT8 recurse = 0;
@ -717,29 +743,7 @@ WRITE8_HANDLER( snes_w_io )
}
case BGMODE: /* BG mode and character size settings */
snes_ppu.mode = data & 0x07;
{
rectangle visarea = *video_screen_get_visible_area(space->machine->primary_screen);
visarea.min_x = visarea.min_y = 0;
visarea.max_y = snes_ppu.beam.last_visible_line - 1;
// fixme: should compensate for SNES_DBG_video
if( snes_ppu.mode == 5 || snes_ppu.mode == 6 )
{
visarea.max_x = (SNES_SCR_WIDTH * 2) - 1;
snes_htmult = 2;
}
else
{
visarea.max_x = SNES_SCR_WIDTH - 1;
snes_htmult = 1;
}
if ((snes_ram[STAT78] & 0x10) == SNES_NTSC)
video_screen_configure(space->machine->primary_screen, SNES_HTOTAL*snes_htmult, SNES_VTOTAL_NTSC, &visarea, video_screen_get_frame_period(space->machine->primary_screen).attoseconds);
else
video_screen_configure(space->machine->primary_screen, SNES_HTOTAL*snes_htmult, SNES_VTOTAL_PAL, &visarea, video_screen_get_frame_period(space->machine->primary_screen).attoseconds);
}
snes_dynamic_res_change(space->machine);
snes_ppu.bg3_priority_bit = data & 0x08;
snes_ppu.layer[0].tile_size = (data >> 4) & 0x1;
snes_ppu.layer[1].tile_size = (data >> 5) & 0x1;
@ -1030,8 +1034,11 @@ WRITE8_HANDLER( snes_w_io )
snes_cgram[FIXED_COLOUR] = (r | (g << 5) | (b << 10));
} break;
case SETINI: /* Screen mode/video select */
/* FIXME: We only support line count here */
/* FIXME: We only support line count and interlace here */
snes_interlace = (data & 1) ? 2 : 1;
snes_ppu.beam.last_visible_line = (data & 0x4) ? 240 : 225;
/* FIXME: move to a common routine */
snes_dynamic_res_change(space->machine);
#ifdef SNES_DBG_REG_W
if( (data & 0x8) != (snes_ram[SETINI] & 0x8) )
mame_printf_debug( "Pseudo 512 mode: %s\n", (data & 0x8) ? "on" : "off" );
@ -1750,6 +1757,7 @@ MACHINE_RESET( snes )
snes_ram[VTIMEH] = 0x1;
snes_htmult = 1;
snes_interlace = 1;
}