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i8275 fixes

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- Codes f0-f3 should be invisible
- Fixed rubbish on zorba intro screen

Unior: fixed regression with cursor.
This commit is contained in:
Robbbert 2014-05-01 07:02:25 +00:00
parent b314730a2c
commit 7329c4038a
3 changed files with 13 additions and 2 deletions
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12
src/emu/video/i8275.c
View File

@ -118,7 +118,8 @@ i8275_device::i8275_device(const machine_config &mconfig, const char *tag, devic
m_dma_stop(false),
m_end_of_screen(false),
m_cursor_blink(0),
m_char_blink(0)
m_char_blink(0),
m_stored_attr(0)
{
}
@ -266,6 +267,7 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
m_char_blink++;
m_char_blink &= 0x3f;
m_stored_attr = 0;
}
if (m_scanline == m_vrtc_drq_scanline)
@ -283,6 +285,11 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
{
int line_counter = OFFSET_LINE_COUNTER ? ((lc - 1) % SCANLINES_PER_ROW) : lc;
bool end_of_row = false;
m_hlgt = (m_stored_attr & FAC_H) ? 1 : 0;
m_vsp = (m_stored_attr & FAC_B) ? 1 : 0;
m_gpa = (m_stored_attr & FAC_GG) >> 2;
m_rvv = (m_stored_attr & FAC_R) ? 1 : 0;
m_lten = (m_stored_attr & FAC_U) ? 1 : 0;
for (int sx = 0; sx < CHARACTERS_PER_ROW; sx++)
{
@ -302,6 +309,8 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
m_gpa = (data & FAC_GG) >> 2;
m_rvv = (data & FAC_R) ? 1 : 0;
m_lten = (data & FAC_U) ? 1 : 0;
if ((SCANLINES_PER_ROW - lc)==1)
m_stored_attr = data;
if (!VISIBLE_FIELD_ATTRIBUTE)
{
@ -334,6 +343,7 @@ void i8275_device::device_timer(emu_timer &timer, device_timer_id id, int param,
m_end_of_screen = true;
break;
}
vsp = 1;
}
else
{

1
src/emu/video/i8275.h
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@ -222,6 +222,7 @@ protected:
int m_cursor_blink;
int m_char_blink;
UINT8 m_stored_attr;
// timers
emu_timer *m_hrtc_on_timer;

2
src/mess/drivers/unior.c
View File

@ -264,7 +264,7 @@ I8275_DRAW_CHARACTER_MEMBER(unior_state::display_pixels)
UINT8 gfx = m_p_chargen[(linecount & 7) | (charcode << 3)];
if(linecount == 8)
return;
gfx = 0;
if (vsp)
gfx = 0;