diff options
Diffstat (limited to 'src/mame/drivers/docastle.c')
-rw-r--r-- | src/mame/drivers/docastle.c | 41 |
1 files changed, 11 insertions, 30 deletions
diff --git a/src/mame/drivers/docastle.c b/src/mame/drivers/docastle.c index 6c4fac61f8e..68f036e475f 100644 --- a/src/mame/drivers/docastle.c +++ b/src/mame/drivers/docastle.c @@ -551,35 +551,6 @@ static GFXDECODE_START( docastle ) GFXDECODE_END -/************************************* - * - * 6845 CRTC interface - * - *************************************/ - -/* -The games program the CRTC for a width of 32 characters (256 pixels). -However, the DE output from the CRTC is first ANDed with the NAND of -MA1 through MA4, and then delayed by 8 pixel clocks; this effectively -blanks the first 8 pixels and last 8 pixels of each line. -*/ - -static MC6845_INTERFACE( crtc_intf ) -{ - false, /* show border area */ - 8,-8,0,0, /* visarea adjustment */ - 8, /* number of pixels per video memory address */ - NULL, /* before pixel update callback */ - NULL, /* row update callback */ - NULL, /* after pixel update callback */ - DEVCB_NULL, /* callback for display state changes */ - DEVCB_NULL, /* callback for cursor state changes */ - DEVCB_DRIVER_LINE_MEMBER(docastle_state, docastle_tint), /* HSYNC callback */ - DEVCB_NULL, /* VSYNC callback */ - NULL /* update address callback */ -}; - - /* Machine Drivers */ void docastle_state::machine_reset() @@ -625,7 +596,17 @@ static MACHINE_CONFIG_START( docastle, docastle_state ) MCFG_CPU_VBLANK_INT_DRIVER("screen", docastle_state, nmi_line_pulse) /* video hardware */ - MCFG_MC6845_ADD("crtc", H46505, "screen", XTAL_9_828MHz / 16, crtc_intf) + MCFG_MC6845_ADD("crtc", H46505, "screen", XTAL_9_828MHz / 16) + /* + The games program the CRTC for a width of 32 characters (256 pixels). + However, the DE output from the CRTC is first ANDed with the NAND of + MA1 through MA4, and then delayed by 8 pixel clocks; this effectively + blanks the first 8 pixels and last 8 pixels of each line. + */ + MCFG_MC6845_SHOW_BORDER_AREA(false) + MCFG_MC6845_VISAREA_ADJUST(8,-8,0,0) + MCFG_MC6845_CHAR_WIDTH(8) + MCFG_MC6845_OUT_HSYNC_CB(WRITELINE(docastle_state, docastle_tint)) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_RAW_PARAMS(XTAL_9_828MHz/2, 0x138, 8, 0x100-8, 0x108, 0, 0xc0) // from crtc |