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author AJR <ajrhacker@users.noreply.github.com>2019-05-29 16:08:47 -0400
committer AJR <ajrhacker@users.noreply.github.com>2019-05-29 16:08:47 -0400
commit84b924a1f714db9e928c133bd4c3d977d5f80bfe (patch)
tree900db0a37b1eb91d52230dede3dfd1e99fbe4a1f /src/devices/bus/sbus/bwtwo.cpp
parent3207d504fed679163f0489e2b763eda8c4139b23 (diff)
Revert "-Removed sbus and gio64 buses..."
This reverts commit 3207d504fed679163f0489e2b763eda8c4139b23.
Diffstat (limited to 'src/devices/bus/sbus/bwtwo.cpp')
-rw-r--r--src/devices/bus/sbus/bwtwo.cpp115
1 files changed, 115 insertions, 0 deletions
diff --git a/src/devices/bus/sbus/bwtwo.cpp b/src/devices/bus/sbus/bwtwo.cpp
new file mode 100644
index 00000000000..65f40df715c
--- /dev/null
+++ b/src/devices/bus/sbus/bwtwo.cpp
@@ -0,0 +1,115 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+/***************************************************************************
+
+ Sun bwtwo monochrome video controller
+
+***************************************************************************/
+
+#include "emu.h"
+#include "bwtwo.h"
+#include "screen.h"
+
+DEFINE_DEVICE_TYPE(SBUS_BWTWO, sbus_bwtwo_device, "bwtwo", "Sun bwtwo SBus Video")
+
+void sbus_bwtwo_device::mem_map(address_map &map)
+{
+ map(0x00000000, 0x00007fff).r(FUNC(sbus_bwtwo_device::rom_r));
+ map(0x00400000, 0x0040001f).rw(FUNC(sbus_bwtwo_device::regs_r), FUNC(sbus_bwtwo_device::regs_w));
+ map(0x00800000, 0x008fffff).rw(FUNC(sbus_bwtwo_device::vram_r), FUNC(sbus_bwtwo_device::vram_w));
+}
+
+ROM_START( sbus_bwtwo )
+ ROM_REGION32_BE(0x8000, "prom", ROMREGION_ERASEFF)
+
+ ROM_SYSTEM_BIOS(0, "1081", "P/N 525-1081-01")
+ ROMX_LOAD( "bw2_525-1081-01.bin", 0x0000, 0x8000, CRC(8b70c8c7) SHA1(fd750ad2fd6efdde957f8b0f9abf962e14fe221a), ROM_BIOS(0) )
+ ROM_SYSTEM_BIOS(1, "1124", "P/N 525-1124-01")
+ ROMX_LOAD( "bw2_525-1124-01.bin", 0x0000, 0x0800, CRC(e37a3314) SHA1(78761bd2369cb0c58ef1344c697a47d3a659d4bc), ROM_BIOS(1) )
+ROM_END
+
+const tiny_rom_entry *sbus_bwtwo_device::device_rom_region() const
+{
+ return ROM_NAME( sbus_bwtwo );
+}
+
+void sbus_bwtwo_device::device_add_mconfig(machine_config &config)
+{
+ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
+ screen.set_screen_update(FUNC(sbus_bwtwo_device::screen_update));
+ screen.set_size(1152, 900);
+ screen.set_visarea(0, 1152-1, 0, 900-1);
+ screen.set_refresh_hz(72);
+}
+
+
+sbus_bwtwo_device::sbus_bwtwo_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, SBUS_BWTWO, tag, owner, clock)
+ , device_sbus_card_interface(mconfig, *this)
+ , m_rom(*this, "prom")
+ , m_screen(*this, "screen")
+{
+}
+
+void sbus_bwtwo_device::device_start()
+{
+ m_vram = std::make_unique<uint8_t[]>(0x100000);
+ save_pointer(NAME(m_vram), 0x100000);
+
+ for (int i = 0; i < 0x100; i++)
+ {
+ for (int bit = 7; bit >= 0; bit--)
+ {
+ m_mono_lut[i][7 - bit] = BIT(i, bit) ? 0 : ~0;
+ }
+ }
+}
+
+void sbus_bwtwo_device::install_device()
+{
+ m_sbus->install_device(m_base, m_base + 0x1ffffff, *this, &sbus_bwtwo_device::mem_map);
+}
+
+uint32_t sbus_bwtwo_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
+{
+ uint8_t *line = &m_vram[0];
+
+ for (int y = 0; y < 900; y++)
+ {
+ uint32_t *scanline = &bitmap.pix32(y);
+ for (int x = 0; x < 1152/8; x++)
+ {
+ memcpy(scanline, m_mono_lut[*line], sizeof(uint32_t) * 8);
+ line++;
+ scanline += 8;
+ }
+ }
+
+ return 0;
+}
+
+READ8_MEMBER(sbus_bwtwo_device::regs_r)
+{
+ logerror("%s: regs_r (unimplemented): %08x\n", machine().describe_context(), 0x400000 + offset);
+ return 0;
+}
+
+WRITE8_MEMBER(sbus_bwtwo_device::regs_w)
+{
+ logerror("%s: regs_w (unimplemented): %08x = %02x\n", machine().describe_context(), 0x400000 + offset, data);
+}
+
+READ32_MEMBER(sbus_bwtwo_device::rom_r)
+{
+ return ((uint32_t*)m_rom->base())[offset];
+}
+
+READ8_MEMBER(sbus_bwtwo_device::vram_r)
+{
+ return m_vram[offset];
+}
+
+WRITE8_MEMBER(sbus_bwtwo_device::vram_w)
+{
+ m_vram[offset] = data;
+}