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t6963c: Fix display when the screen size is not a multiple of the number of columns. [BALATON Zoltan]

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This commit is contained in:
arbee 2022-05-26 21:28:46 -04:00
parent ca162bf356
commit 0fe568d90f
1 changed files with 9 additions and 4 deletions
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13
src/devices/video/t6963c.cpp
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@ -323,14 +323,17 @@ void t6963c_device::set_md(u8 data)
uint32_t t6963c_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int offs;
bitmap.fill(0, cliprect);
// Text layer
if (BIT(m_display_mode, 3))
{
offs = m_text_home;
for(int y=0; y<m_number_lines; y++)
for(int x=0; x<m_text_area; x++)
{
u8 c = m_display_ram->read_byte(m_text_home + y * m_number_cols + x);
u8 c = m_display_ram->read_byte(offs++);
for(int cy=0; cy<8; cy++)
{
@ -349,13 +352,15 @@ uint32_t t6963c_device::screen_update(screen_device &screen, bitmap_ind16 &bitma
bitmap.pix(y * 8 + cy, x * m_font_size + cx) = BIT(data, m_font_size - 1 - cx);
}
}
}
// Graphic layer
if (BIT(m_display_mode, 2))
{
offs = m_graphic_home;
for(int y=0; y<m_number_lines*8; y++)
for(int x=0; x<m_graphic_area; x++)
{
u8 data = m_display_ram->read_byte(m_graphic_home + y * m_number_cols + x);
u8 data = m_display_ram->read_byte(offs++);
for(int i=0; i<m_font_size; i++)
{
int pix = BIT(data, m_font_size - 1 - i);
@ -376,7 +381,7 @@ uint32_t t6963c_device::screen_update(screen_device &screen, bitmap_ind16 &bitma
}
}
}
}
return 0;
}