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(MESS) bbc : fixed character position in mode 7

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This commit is contained in:
Robbbert 2013-12-24 02:56:11 +00:00
parent 54f3807910
commit 39bf80cf5c
1 changed files with 6 additions and 9 deletions
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15
src/mess/video/bbc.c
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@ -10,8 +10,6 @@
mames built in mc6845, there are a number of features now incorrect
or missing in this build:
Cursors are missing.
Mode 7 is shifted to the right by a couple of character.
BBC split modes no longer work (Like is used in Elite.)
******************************************************************************/
@ -169,8 +167,6 @@ 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);
if (state->m_videoULA_teletext_normal_select)
{
state->m_trom->lose_w(1);
@ -182,17 +178,18 @@ static MC6845_UPDATE_ROW( vid_update_row )
//Teletext Latch bit 6 is only passed onto bits 6 on the Teletext chip if DE is true
//Teletext Latch bit 7 goes to LOSE on the Teletext chip
state->m_trom->write((state->m_Teletext_Latch&0x3f)|(state->m_Teletext_Latch&0x40));
state->m_trom->f1_w(1);
state->m_trom->f1_w(0);
if (((ma>>13)&1)==0)
{
state->m_Teletext_Latch=0;
} else {
state->m_Teletext_Latch=(state->m_BBC_Video_RAM[state->calculate_video_address(ma+x_pos,ra)]);
}
state->m_trom->write((state->m_Teletext_Latch&0x3f)|(state->m_Teletext_Latch&0x40));
state->m_trom->f1_w(1);
state->m_trom->f1_w(0);
for(int pixelno=0;pixelno<6;pixelno++)
{
state->m_trom->tr6_w(1);