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cgthree: allow system to program palette (nw)

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This commit is contained in:
arbee 2018-09-12 23:50:19 -04:00
parent 9dea8bbd37
commit e5268aa721
2 changed files with 25 additions and 2 deletions
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26
src/devices/bus/sbus/cgthree.cpp
View File

@ -55,6 +55,7 @@ void sbus_cgthree_device::device_start()
{
m_vram = std::make_unique<uint32_t[]>(0x100000/4);
m_vram2 = std::make_unique<uint32_t[]>(0x100000/4);
entry = r = g = b = step = 0;
}
void sbus_cgthree_device::install_device()
@ -98,7 +99,28 @@ READ32_MEMBER(sbus_cgthree_device::unknown_r)
WRITE32_MEMBER(sbus_cgthree_device::unknown_w)
{
logerror("%s: unknown_w: %08x = %08x & %08x\n", machine().describe_context(), offset << 2, data, mem_mask);
if (offset == 0x100000)
{
entry = data >> 24;
step = 0;
}
else if (offset == 0x100001)
{
switch (step)
{
case 0: r = data>>24; step++; break;
case 1: g = data>>24; step++; break;
case 2:
b = data>>24;
m_palette->set_pen_color(entry, rgb_t(r, g, b));
step = 0;
break;
}
}
else
{
logerror("%s: unknown_w: %08x = %08x & %08x\n", machine().describe_context(), offset << 2, data, mem_mask);
}
}
READ8_MEMBER(sbus_cgthree_device::regs_r)
@ -135,4 +157,4 @@ READ32_MEMBER(sbus_cgthree_device::vram2_r)
WRITE32_MEMBER(sbus_cgthree_device::vram2_w)
{
COMBINE_DATA(&m_vram2[offset]);
}
}

1
src/devices/bus/sbus/cgthree.h
View File

@ -51,6 +51,7 @@ private:
std::unique_ptr<uint32_t[]> m_vram2; // ???
required_device<screen_device> m_screen;
required_device<palette_device> m_palette;
int entry, r, g, b, step;
};
// device type definition