diff options
Diffstat (limited to 'src/mess/video/bbc.c')
-rw-r--r-- | src/mess/video/bbc.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/src/mess/video/bbc.c b/src/mess/video/bbc.c index b420703cfb5..bb195d5f419 100644 --- a/src/mess/video/bbc.c +++ b/src/mess/video/bbc.c @@ -44,13 +44,13 @@ unsigned int calculate_video_address(bbc_state *state,int ma,int ra) int c1=state->m_b5_video1; /* the 4 bit input port b on IC39 are produced by 4 NAND gates. - these NAND gates take their - inputs from c0 and c1 (from IC32) and ma12 (from the 6845) */ + these NAND gates take their + inputs from c0 and c1 (from IC32) and ma12 (from the 6845) */ /* get bit m12 from the 6845 */ int ma12=(ma>>12)&1; - // 4 bit input B on IC39 74LS283 (4 bit adder) + // 4 bit input B on IC39 74LS283 (4 bit adder) /* 3 input NAND part of IC 36 */ int b1=(~(c1 & c0 & ma12)) & 1; /* 2 input NAND part of IC40 (b3 is calculated before b2 and b4 because b3 feed back into b2 and b4) */ @@ -70,8 +70,8 @@ unsigned int calculate_video_address(bbc_state *state,int ma,int ra) int s=(a+b+1)&0xf; /* if MA13 (TTXVDU) is low then IC8 and IC9 are used to calculate - the memory location required for the hi res video. - if MA13 is hight then IC10 and IC11 are used to calculate the memory location for the teletext chip*/ + the memory location required for the hi res video. + if MA13 is hight then IC10 and IC11 are used to calculate the memory location for the teletext chip*/ unsigned int m; if ((ma>>13)&1) { @@ -113,9 +113,9 @@ WRITE8_MEMBER(bbc_state::bbc_videoULA_w) // Make sure vpos is never <0 2008-10-11 PHS. int vpos=machine().primary_screen->vpos(); if(vpos==0) - machine().primary_screen->update_partial(vpos); + machine().primary_screen->update_partial(vpos); else - machine().primary_screen->update_partial(vpos -1 ); + machine().primary_screen->update_partial(vpos -1 ); logerror("setting videoULA %.4x to:%.4x at :%d \n",data,offset,machine().primary_screen->vpos() ); @@ -194,7 +194,7 @@ static MC6845_UPDATE_ROW( vid_update_row ) bbc_state *state = device->machine().driver_data<bbc_state>(); const rgb_t *palette = palette_entry_list_raw(bitmap.palette()); - logerror("MC6845_UPDATE_ROW: ma=%d, ra=%d, y=%d, x_count=%d\n",ma,ra,y,x_count); + logerror("MC6845_UPDATE_ROW: ma=%d, ra=%d, y=%d, x_count=%d\n",ma,ra,y,x_count); if (state->m_videoULA_teletext_normal_select) { @@ -284,15 +284,15 @@ WRITE_LINE_MEMBER(bbc_state::bbc_vsync) const mc6845_interface bbc_mc6845_intf = { - "screen", /* screen number */ - 8, /* numbers of pixels per video memory address */ - NULL, /* begin_update */ - vid_update_row, /* update_row */ - NULL, /* end_update */ - DEVCB_NULL, /* on_de_changed */ - DEVCB_NULL, /* on_cur_changed */ - DEVCB_NULL, /* on_hsync_changed */ - DEVCB_DRIVER_LINE_MEMBER(bbc_state,bbc_vsync), /* on_vsync_changed */ + "screen", /* screen number */ + 8, /* numbers of pixels per video memory address */ + NULL, /* begin_update */ + vid_update_row, /* update_row */ + NULL, /* end_update */ + DEVCB_NULL, /* on_de_changed */ + DEVCB_NULL, /* on_cur_changed */ + DEVCB_NULL, /* on_hsync_changed */ + DEVCB_DRIVER_LINE_MEMBER(bbc_state,bbc_vsync), /* on_vsync_changed */ NULL }; |