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wy50: Encode a few attributes (nw)

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This commit is contained in:
AJR 2019-02-10 00:33:41 -05:00
parent d8830f5429
commit 6e715a1e5c
1 changed files with 31 additions and 4 deletions
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35
src/mame/drivers/wy50.cpp
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@ -54,6 +54,7 @@ protected:
private:
u8 pvtc_videoram_r(offs_t offset);
SCN2672_DRAW_CHARACTER_MEMBER(draw_character);
DECLARE_WRITE_LINE_MEMBER(mbc_attr_clock_w);
u8 pvtc_r(offs_t offset);
void pvtc_w(offs_t offset, u8 data);
@ -77,15 +78,21 @@ private:
required_region_ptr<u8> m_chargen;
required_shared_ptr_array<u8, 2> m_videoram;
u8 m_cur_attr;
u8 m_last_row_attr;
u8 m_row_buffer_char;
bool m_is_132;
};
void wy50_state::machine_start()
{
m_cur_attr = 0;
m_last_row_attr = 0;
m_row_buffer_char = 0;
m_is_132 = false;
save_item(NAME(m_cur_attr));
save_item(NAME(m_last_row_attr));
save_item(NAME(m_row_buffer_char));
save_item(NAME(m_is_132));
}
@ -104,19 +111,38 @@ u8 wy50_state::pvtc_videoram_r(offs_t offset)
SCN2672_DRAW_CHARACTER_MEMBER(wy50_state::draw_character)
{
bool is_attr = (charcode & 0xe0) == 0x80;
u16 dots = is_attr ? 0 : m_chargen[charcode << 4 | linecount] << 1;
const bool attr = (charcode & 0xe0) == 0x80;
if (attr)
m_cur_attr = charcode & 0x1f;
else if (x == 0)
m_cur_attr = m_last_row_attr;
u16 dots;
if (attr || (BIT(m_cur_attr, 1) && blink) || BIT(m_cur_attr, 2))
dots = 0;
else if (BIT(m_cur_attr, 3) && ul)
dots = 0x3ff;
else
dots = m_chargen[charcode << 4 | linecount] << 2;
if (!attr && BIT(m_cur_attr, 4))
dots = ~dots;
if (cursor)
dots = ~dots;
for (int i = 0; i < 9; i++)
{
bitmap.pix32(y, x++) = BIT(dots, 8) ? rgb_t::white() : rgb_t::black();
bitmap.pix32(y, x++) = BIT(dots, 9) ? rgb_t::white() : rgb_t::black();
dots <<= 1;
}
if (!m_is_132)
bitmap.pix32(y, x++) = BIT(dots, 8) ? rgb_t::white() : rgb_t::black();
bitmap.pix32(y, x++) = BIT(dots, 9) ? rgb_t::white() : rgb_t::black();
}
WRITE_LINE_MEMBER(wy50_state::mbc_attr_clock_w)
{
if (state)
m_last_row_attr = m_cur_attr;
}
u8 wy50_state::pvtc_r(offs_t offset)
@ -231,6 +257,7 @@ void wy50_state::wy50(machine_config &config)
m_pvtc->set_display_callback(FUNC(wy50_state::draw_character));
m_pvtc->intr_callback().set_inputline(m_maincpu, MCS51_T0_LINE);
m_pvtc->breq_callback().set_inputline(m_maincpu, MCS51_INT0_LINE);
m_pvtc->mbc_callback().set(FUNC(wy50_state::mbc_attr_clock_w));
m_pvtc->mbc_char_callback().set(FUNC(wy50_state::pvtc_videoram_r));
MC2661(config, m_sio, 4.9152_MHz_XTAL); // SCN2661B