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Correctly setup the MC6845 device in the carrera driver.

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This commit is contained in:
Phil Bennett 2008-12-25 09:58:00 +00:00
parent ffdc537488
commit d984fa551b
2 changed files with 21 additions and 9 deletions
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1
src/emu/drivers/xtal.h
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@ -111,6 +111,7 @@ enum
XTAL_21_3MHz = 21300000,
XTAL_21_4772MHz = 21477200, /* BMC bowling, some Data East 90's games */
XTAL_22MHz = 22000000,
XTAL_22_1184MHz = 22118400,
XTAL_24MHz = 24000000, /* Mario, 80's Data East games, 80's Konami games */
XTAL_24_576MHz = 24576000, /* Pole Position h/w, Model 3 CPU board */
XTAL_25MHz = 25000000, /* Namco System 22, Taito GNET, Dogyuun h/w */

23
src/mame/drivers/carrera.c
View File

@ -39,7 +39,7 @@ Emulation Notes:
*/
#define MASTER_CLOCK 22118400
#define MASTER_CLOCK XTAL_22_1184MHz
#include "driver.h"
#include "cpu/z80/z80.h"
@ -284,6 +284,20 @@ static PALETTE_INIT(carrera)
palette_set_color_rgb(machine, x, pal3bit(src[x] >> 0), pal3bit(src[x] >> 3), pal2bit(src[x] >> 6));
}
static const mc6845_interface mc6845_intf =
{
"main", /* screen we are acting on */
8, /* number of pixels per video memory address */
NULL, /* before pixel update callback */
NULL, /* row update callback */
NULL, /* after pixel update callback */
NULL, /* callback for display state changes */
NULL, /* HSYNC callback */
NULL /* VSYNC callback */
};
static MACHINE_DRIVER_START( carrera )
/* basic machine hardware */
MDRV_CPU_ADD("main", Z80, MASTER_CLOCK / 6)
@ -299,14 +313,14 @@ static MACHINE_DRIVER_START( carrera )
MDRV_SCREEN_SIZE(512, 256)
MDRV_SCREEN_VISIBLE_AREA(0, 512-1, 0, 256-1)
MDRV_MC6845_ADD("crtc", MC6845, MASTER_CLOCK / 16, mc6845_intf)
MDRV_GFXDECODE(carrera)
MDRV_PALETTE_LENGTH(32)
MDRV_PALETTE_INIT(carrera)
MDRV_VIDEO_UPDATE(carrera)
MDRV_MC6845_ADD("crtc", MC6845, 0, mc6845_null_interface)
/* sound hardware */
MDRV_SPEAKER_STANDARD_MONO("mono")
@ -316,9 +330,6 @@ static MACHINE_DRIVER_START( carrera )
MACHINE_DRIVER_END
ROM_START( carrera )
ROM_REGION( 0x10000, "main", 0 )
ROM_LOAD( "27512.ic22", 0x00000, 0x10000, CRC(2385b9c8) SHA1(12d4397779e074096fbb23b114985f104366b79c) )