diff options
Diffstat (limited to 'src/devices/bus/sbus/cgthree.cpp')
-rw-r--r-- | src/devices/bus/sbus/cgthree.cpp | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/devices/bus/sbus/cgthree.cpp b/src/devices/bus/sbus/cgthree.cpp new file mode 100644 index 00000000000..091efef3b21 --- /dev/null +++ b/src/devices/bus/sbus/cgthree.cpp @@ -0,0 +1,121 @@ +// license:BSD-3-Clause +// copyright-holders:Ryan Holtz +/*************************************************************************** + + Sun cgthree color video controller + +***************************************************************************/ + +#include "emu.h" +#include "cgthree.h" +#include "screen.h" + +DEFINE_DEVICE_TYPE(SBUS_CGTHREE, sbus_cgthree_device, "cgthree", "Sun cgthree SBus Video") + +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, 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)); +} + +ROM_START( sbus_cgthree ) + ROM_REGION32_BE(0x800, "prom", ROMREGION_ERASEFF) + ROM_LOAD( "sunw,501-1415.bin", 0x0000, 0x0800, CRC(d1eb6f4d) SHA1(9bef98b2784b6e70167337bb27cd07952b348b5a)) +ROM_END + +const tiny_rom_entry *sbus_cgthree_device::device_rom_region() const +{ + return ROM_NAME( sbus_cgthree ); +} + +void sbus_cgthree_device::device_add_mconfig(machine_config &config) +{ + SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + m_screen->set_screen_update(FUNC(sbus_cgthree_device::screen_update)); + m_screen->set_raw(92.9405_MHz_XTAL, 1504, 0, 1152, 937, 0, 900); + + BT458(config, m_ramdac, 0); +} + +sbus_cgthree_device::sbus_cgthree_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, SBUS_CGTHREE, tag, owner, clock) + , device_sbus_card_interface(mconfig, *this) + , m_rom(*this, "prom") + , m_screen(*this, "screen") + , m_ramdac(*this, "ramdac") +{ +} + +void sbus_cgthree_device::device_start() +{ + m_vram = std::make_unique<uint32_t[]>(0x100000/4); + save_pointer(NAME(m_vram), 0x100000/4); +} + +void sbus_cgthree_device::device_reset() +{ +} + +void sbus_cgthree_device::install_device() +{ + m_sbus->install_device(m_base, m_base + 0x1ffffff, *this, &sbus_cgthree_device::mem_map); +} + +uint32_t sbus_cgthree_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) +{ + const pen_t *pens = m_ramdac->pens(); + uint8_t *vram = (uint8_t *)&m_vram[0]; + + for (int y = 0; y < 900; y++) + { + uint32_t *scanline = &bitmap.pix32(y); + for (int x = 0; x < 1152; x++) + { + const uint8_t pixel = vram[y * 1152 + BYTE4_XOR_BE(x)]; + *scanline++ = pens[pixel]; + } + } + + return 0; +} + +READ32_MEMBER(sbus_cgthree_device::unknown_r) +{ + logerror("%s: unknown_r: %08x & %08x\n", machine().describe_context(), offset << 2, mem_mask); + return 0; +} + +WRITE32_MEMBER(sbus_cgthree_device::unknown_w) +{ + logerror("%s: unknown_w: %08x = %08x & %08x\n", machine().describe_context(), offset << 2, data, mem_mask); +} + +READ8_MEMBER(sbus_cgthree_device::regs_r) +{ + logerror("%s: regs_r: Unimplemented: %08x\n", machine().describe_context(), 0x7ff800 + offset); + return 0; +} + +WRITE8_MEMBER(sbus_cgthree_device::regs_w) +{ + logerror("%s: regs_w: Unimplemented: %08x = %02x\n", machine().describe_context(), 0x7ff800 + offset, data); +} + +READ32_MEMBER(sbus_cgthree_device::rom_r) +{ + return ((uint32_t*)m_rom->base())[offset]; +} + +READ32_MEMBER(sbus_cgthree_device::vram_r) +{ + return m_vram[offset]; +} + +WRITE32_MEMBER(sbus_cgthree_device::vram_w) +{ + COMBINE_DATA(&m_vram[offset]); +} |