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toaplan1.c: correct SCREEN_RAW_PARAMS for all games based on CRTC registers [Alex Jackson]

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This commit is contained in:
Alex W. Jackson 2014-04-07 00:02:01 +00:00
parent b67f2f5c8a
commit 4afefdf4b6
1 changed files with 20 additions and 28 deletions
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48
src/mame/drivers/toaplan1.c
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@ -448,10 +448,9 @@ Stephh's and AWJ's notes (based on the games M68000 and Z80 code and some tests)
- Spelling error on the Sound Check screen: "BUTTAN" instead of "BUTTON".
- This set and 'outzonec' have a hidden use for the two "Unused" Dip Switches.
If DSWA bit 0 ("Unused") and DSWB bit 7 (also "Unused") are both set to ON and
P2 joystick is held DOWN during startup, video registers 0x300008 and 0x340000
are loaded with different values than usual (code at 0x013868 and 0x013904).
Unfortunately, whatever difference this is supposed to make to the display is
not currently known nor emulated by MAME :(
P2 joystick is held DOWN during startup, the CRTC registers are programmed for a
smaller VTOTAL than usual, giving a higher frame rate but cutting off the edges
of the screen (the effect of this isn't correctly emulated yet)
- Likewise, if DSWA bit 0 is ON and DSWB bit 7 is OFF, the game never starts up
(it seems to infinitely repeat one of the RAM tests)
@ -620,27 +619,6 @@ To Do:
#include "includes/toaplan1.h"
#include "sound/3812intf.h"
#define PIXEL_CLOCK (XTAL_28MHz/4)
/* freq V Hz H kHz
Fire Shark 57.6132 14.82 --> 472.33 * 257.23 *note: H may be inaccurate
Vimana 57.6125 14.78 --> 473.61 * 256.54 *note: H may be inaccurate
** earlier measurements from another pcb owner, why are some of these off by 2Hz???
Hellfire 57.59 ?
Truxton 57.59 ?
Rally Bike 55.14 ?
Vimana 55.14 ?
*/
#define HTOTAL (464)
#define HBEND (0)
#define HBSTART (320)
#define VTOTAL (262)
#define VBEND (0)
#define VBSTART (240)
/***************************** 68000 Memory Map *****************************/
@ -1787,6 +1765,20 @@ WRITE_LINE_MEMBER(toaplan1_state::irqhandler)
m_audiocpu->set_input_line(0, state);
}
#define PIXEL_CLOCK (XTAL_28MHz/4)
// HTOTAL and VTOTAL taken from CRTC registers (toaplan1_bcu_control_w)
// rallybik, demonwld and outzone program a larger VTOTAL than the other
// games, giving them a lower frame rate
#define HTOTAL ((224+1)*2)
#define HBEND (0)
#define HBSTART (320)
#define VTOTAL ((134+1)*2)
#define VTOTAL55 ((140+1)*2)
#define VBEND (0)
#define VBSTART (240)
static MACHINE_CONFIG_START( rallybik, toaplan1_rallybik_state )
@ -1807,7 +1799,7 @@ static MACHINE_CONFIG_START( rallybik, toaplan1_rallybik_state )
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK)
MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL, VBEND, VBSTART)
MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL55, VBEND, VBSTART)
MCFG_SCREEN_UPDATE_DRIVER(toaplan1_rallybik_state, screen_update_rallybik)
MCFG_SCREEN_VBLANK_DRIVER(toaplan1_rallybik_state, screen_eof_rallybik)
MCFG_SCREEN_PALETTE("palette")
@ -1965,7 +1957,7 @@ static MACHINE_CONFIG_START( demonwld, toaplan1_state )
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK)
MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL, VBEND+16, VBSTART+16)
MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL55, VBEND+16, VBSTART+16)
MCFG_SCREEN_UPDATE_DRIVER(toaplan1_state, screen_update_toaplan1)
MCFG_SCREEN_VBLANK_DRIVER(toaplan1_state, screen_eof_toaplan1)
MCFG_SCREEN_PALETTE("palette")
@ -2039,7 +2031,7 @@ static MACHINE_CONFIG_START( outzone, toaplan1_state )
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK)
MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL, VBEND, VBSTART)
MCFG_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL55, VBEND, VBSTART)
MCFG_SCREEN_UPDATE_DRIVER(toaplan1_state, screen_update_toaplan1)
MCFG_SCREEN_VBLANK_DRIVER(toaplan1_state, screen_eof_toaplan1)
MCFG_SCREEN_PALETTE("palette")