summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/sbus/cgthree.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/sbus/cgthree.cpp')
-rw-r--r--src/devices/bus/sbus/cgthree.cpp67
1 files changed, 9 insertions, 58 deletions
diff --git a/src/devices/bus/sbus/cgthree.cpp b/src/devices/bus/sbus/cgthree.cpp
index da7a2178105..f4582c2d862 100644
--- a/src/devices/bus/sbus/cgthree.cpp
+++ b/src/devices/bus/sbus/cgthree.cpp
@@ -16,7 +16,7 @@ void sbus_cgthree_device::mem_map(address_map &map)
{
map(0x00000000, 0x01ffffff).rw(FUNC(sbus_cgthree_device::unknown_r), FUNC(sbus_cgthree_device::unknown_w));
map(0x00000000, 0x000007ff).r(FUNC(sbus_cgthree_device::rom_r));
- map(0x00400000, 0x00400007).w(FUNC(sbus_cgthree_device::palette_w));
+ map(0x00400000, 0x0040000f).m(m_ramdac, FUNC(bt458_device::map)).umask32(0xff000000);
map(0x007ff800, 0x007ff81f).rw(FUNC(sbus_cgthree_device::regs_r), FUNC(sbus_cgthree_device::regs_w));
map(0x00800000, 0x008fffff).rw(FUNC(sbus_cgthree_device::vram_r), FUNC(sbus_cgthree_device::vram_w));
map(0x00bff800, 0x00cff7ff).rw(FUNC(sbus_cgthree_device::vram_r), FUNC(sbus_cgthree_device::vram_w));
@@ -34,13 +34,13 @@ const tiny_rom_entry *sbus_cgthree_device::device_rom_region() const
void sbus_cgthree_device::device_add_mconfig(machine_config &config)
{
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_screen_update(FUNC(sbus_cgthree_device::screen_update));
- screen.set_size(1152, 900);
- screen.set_visarea(0, 1152-1, 0, 900-1);
- screen.set_refresh_hz(72);
+ SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
+ m_screen->set_screen_update(FUNC(sbus_cgthree_device::screen_update));
+ m_screen->set_size(1152, 900);
+ m_screen->set_visarea(0, 1152-1, 0, 900-1);
+ m_screen->set_refresh_hz(72);
- PALETTE(config, m_palette, 256).set_init(DEVICE_SELF, FUNC(sbus_cgthree_device::palette_init));
+ BT458(config, m_ramdac, 0);
}
sbus_cgthree_device::sbus_cgthree_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
@@ -48,28 +48,17 @@ sbus_cgthree_device::sbus_cgthree_device(const machine_config &mconfig, const ch
, device_sbus_card_interface(mconfig, *this)
, m_rom(*this, "prom")
, m_screen(*this, "screen")
- , m_palette(*this, "palette")
+ , m_ramdac(*this, "ramdac")
{
}
void sbus_cgthree_device::device_start()
{
m_vram = std::make_unique<uint32_t[]>(0x100000/4);
-
- save_item(NAME(m_palette_entry));
- save_item(NAME(m_palette_r));
- save_item(NAME(m_palette_g));
- save_item(NAME(m_palette_b));
- save_item(NAME(m_palette_step));
}
void sbus_cgthree_device::device_reset()
{
- m_palette_entry = 0;
- m_palette_r = 0;
- m_palette_g = 0;
- m_palette_b = 0;
- m_palette_step = 0;
}
void sbus_cgthree_device::install_device()
@@ -77,18 +66,9 @@ void sbus_cgthree_device::install_device()
m_sbus->install_device(m_base, m_base + 0x1ffffff, *this, &sbus_cgthree_device::mem_map);
}
-void sbus_cgthree_device::palette_init(palette_device &palette)
-{
- for (int i = 0; i < 256; i++)
- {
- const uint8_t reversed = 255 - i;
- palette.set_pen_color(i, rgb_t(reversed, reversed, reversed));
- }
-}
-
uint32_t sbus_cgthree_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
- const pen_t *pens = m_palette->pens();
+ const pen_t *pens = m_ramdac->pens();
uint8_t *vram = (uint8_t *)&m_vram[0];
for (int y = 0; y < 900; y++)
@@ -115,35 +95,6 @@ WRITE32_MEMBER(sbus_cgthree_device::unknown_w)
logerror("%s: unknown_w: %08x = %08x & %08x\n", machine().describe_context(), offset << 2, data, mem_mask);
}
-WRITE32_MEMBER(sbus_cgthree_device::palette_w)
-{
- if (offset == 0)
- {
- m_palette_entry = data >> 24;
- m_palette_step = 0;
- }
- else
- {
- switch (m_palette_step)
- {
- case 0:
- m_palette_r = data >> 24;
- m_palette_step++;
- break;
- case 1:
- m_palette_g = data >> 24;
- m_palette_step++;
- break;
- case 2:
- m_palette_b = data >> 24;
- m_palette->set_pen_color(m_palette_entry, rgb_t(m_palette_r, m_palette_g, m_palette_b));
- m_palette_step = 0;
- m_palette_entry++;
- break;
- }
- }
-}
-
READ8_MEMBER(sbus_cgthree_device::regs_r)
{
logerror("%s: regs_r: Unimplemented: %08x\n", machine().describe_context(), 0x7ff800 + offset);