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Preliminary hook-up of VGA pixel clock

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This commit is contained in:
Angelo Salese 2011-12-29 11:53:53 +00:00
parent 56c474efba
commit 229df6131a
2 changed files with 14 additions and 43 deletions
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53
src/emu/video/pc_vga.c
View File

@ -16,6 +16,14 @@
ega/vga
64k (early ega 16k) words of 32 bit memory
TODO:
- modernize
- convert to a device.
- fix pixel clock
- add emulated mc6845 hook-up
- fix resolution change
- fix video update.
- (and many more ...)
ROM declarations:
@ -525,38 +533,8 @@ static READ8_HANDLER(vga_crtc_r)
case 0xa:
vga.attribute.state = 0;
data = 0;/*4; */
#if 0 /* slow */
{
int clock=vga.monitor.get_clock();
int lines=vga.monitor.get_lines();
int columns=vga.monitor.get_columns();
int diff = (((space->machine().time() - vga.monitor.start_time) * clock).seconds)
%(lines*columns);
if (diff<columns*vga.monitor.get_sync_lines()) data|=8;
diff=diff/lines;
if (diff%columns<vga.monitor.get_sync_columns()) data|=1;
}
#elif 1
if (vga.monitor.retrace)
{
data |= 1;
if ((space->machine().time() - vga.monitor.start_time) > attotime::from_usec(300))
{
data |= 8;
vga.monitor.retrace=0;
}
}
else
{
if ((space->machine().time() - vga.monitor.start_time) > attotime::from_msec(15))
vga.monitor.retrace=1;
vga.monitor.start_time=space->machine().time();
}
#else
// not working with ps2m30
if (vga.monitor.retrace) data|=9;
vga.monitor.retrace=0;
#endif
data |= (space->machine().primary_screen->hblank() & 1) << 0;
data |= (space->machine().primary_screen->vblank() & 1) << 3;
/* ega diagnostic readback enough for oak bios */
switch (vga.attribute.data[0x12]&0x30) {
case 0:
@ -998,11 +976,6 @@ void pc_vga_init(running_machine &machine, const struct pc_vga_interface *vga_in
pc_vga_reset(machine);
}
static TIMER_CALLBACK(vga_timer)
{
vga.monitor.retrace=1;
}
static VIDEO_START( vga )
{
vga.monitor.get_clock=vga_get_clock;
@ -1010,7 +983,6 @@ static VIDEO_START( vga )
vga.monitor.get_columns=vga_get_crtc_columns;
vga.monitor.get_sync_lines=vga_get_crtc_sync_lines;
vga.monitor.get_sync_columns=vga_get_crtc_sync_columns;
machine.scheduler().timer_pulse(attotime::from_hz(60), FUNC(vga_timer));
pc_video_start(machine, pc_vga_choosevideomode);
}
@ -1269,11 +1241,8 @@ size_t pc_vga_memory_size(void)
MACHINE_CONFIG_FRAGMENT( pcvideo_vga )
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MCFG_SCREEN_SIZE(720, 480)
MCFG_SCREEN_VISIBLE_AREA(0,720-1, 0,480-1)
MCFG_SCREEN_RAW_PARAMS(XTAL_25_1748MHz,800,0,640,525,0,480)
MCFG_SCREEN_UPDATE(pc_video)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_PALETTE_LENGTH(0x100)
MCFG_PALETTE_INIT(vga)

4
src/mame/drivers/taitowlf.c
View File

@ -437,6 +437,7 @@ ADDRESS_MAP_END
/*****************************************************************************/
#if 0
#define AT_KEYB_HELPER(bit, text, key1) \
PORT_BIT( bit, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME(text) PORT_CODE(key1)
@ -470,6 +471,7 @@ static INPUT_PORTS_START(taitowlf)
PORT_START("pc_keyboard_7")
INPUT_PORTS_END
#endif
static IRQ_CALLBACK(irq_callback)
{
@ -683,4 +685,4 @@ ROM_END
/*****************************************************************************/
GAME(1997, pf2012, 0, taitowlf, taitowlf, taitowlf, ROT0, "Taito", "Psychic Force 2012", GAME_NOT_WORKING | GAME_NO_SOUND)
GAME(1997, pf2012, 0, taitowlf, pc_keyboard, taitowlf, ROT0, "Taito", "Psychic Force 2012", GAME_NOT_WORKING | GAME_NO_SOUND)