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qvt103: Basic screen rendering

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This commit is contained in:
Dirk Best 2019-06-25 11:32:28 +02:00
parent 424a18928d
commit fe72c93511
1 changed files with 22 additions and 1 deletions
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23
src/mame/drivers/qvt103.cpp
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@ -23,6 +23,7 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_p_chargen(*this, "chargen")
, m_vram(*this, "vram")
{ }
void qvt103(machine_config &config);
@ -35,20 +36,40 @@ private:
required_device<z80_device> m_maincpu;
required_region_ptr<u8> m_p_chargen;
required_shared_ptr<u8> m_vram;
};
u32 qvt103_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
for (int col = 0; col < 25; col++)
{
for (int row = 0; row < 80; row++)
{
uint8_t code = m_vram[col * 80 + row] & 0x7f;
for (int y = 0; y < 12; y++)
{
uint16_t gfx = m_p_chargen[code << 4 | y];
for (int x = 0; x < 8; x++)
bitmap.pix32(col*12 + y, row*8 + (7 - x)) = BIT(gfx, x) ? rgb_t::white() : rgb_t::black();
}
}
}
return 0;
}
void qvt103_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x5fff).rom().region("maincpu", 0);
map(0x6000, 0x6001).rw("kbdmcu", FUNC(i8741a_device::upi41_master_r), FUNC(i8741a_device::upi41_master_w));
// map(0x6000, 0x6001).lr8("test", [this]() -> u8 { return machine().rand(); }); // uncomment to pass kbd test
map(0x8000, 0x87ff).ram().share("nvram");
map(0xa000, 0xa03f).rw("vpac", FUNC(crt9007_device::read), FUNC(crt9007_device::write));
map(0xc000, 0xffff).ram(); // not entirely contiguous?
map(0xc000, 0xdfff).ram(); // not entirely contiguous?
map(0xe000, 0xffff).ram().share("vram");
}
void qvt103_state::io_map(address_map &map)