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-rw-r--r--src/devices/bus/isa/ex1280.cpp216
1 files changed, 216 insertions, 0 deletions
diff --git a/src/devices/bus/isa/ex1280.cpp b/src/devices/bus/isa/ex1280.cpp
new file mode 100644
index 00000000000..393f40fb51d
--- /dev/null
+++ b/src/devices/bus/isa/ex1280.cpp
@@ -0,0 +1,216 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+
+#include "emu.h"
+#include "ex1280.h"
+
+
+DEFINE_DEVICE_TYPE(ISA16_EX1280, isa16_ex1280_device, "ex1280", "Vectrix EX1280")
+
+//-------------------------------------------------
+// isa16_ex1280_device - constructor
+//-------------------------------------------------
+
+isa16_ex1280_device::isa16_ex1280_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, ISA16_EX1280, tag, owner, clock)
+ , device_isa16_card_interface(mconfig, *this)
+ , m_cpu(*this, "maincpu")
+ , m_ramdac(*this, "ramdac")
+ , m_screen(*this, "screen")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void isa16_ex1280_device::device_start()
+{
+ set_isa_device();
+
+ save_item(NAME(m_flags));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void isa16_ex1280_device::device_reset()
+{
+ m_vram.clear();
+ m_vram.resize(0xa00000);
+ m_flags = 0x0002;
+}
+
+
+//-------------------------------------------------
+// main_map - memory map for the card's TMS34010
+//-------------------------------------------------
+
+void isa16_ex1280_device::main_map(address_map &map)
+{
+ map(0x00000000, 0x009fffff).rw(FUNC(isa16_ex1280_device::vram_r), FUNC(isa16_ex1280_device::vram_w));
+ map(0x04000000, 0x04000fff).rw(FUNC(isa16_ex1280_device::regs_r), FUNC(isa16_ex1280_device::regs_w));
+ map(0xfff00000, 0xfffbffff).ram();
+ map(0xfffc0000, 0xffffffff).rom().region("ex1280", 0);
+}
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void isa16_ex1280_device::device_add_mconfig(machine_config &config)
+{
+ TMS34010(config, m_cpu, 64000000);
+ m_cpu->set_addrmap(AS_PROGRAM, &isa16_ex1280_device::main_map);
+ m_cpu->set_halt_on_reset(false);
+ m_cpu->set_pixel_clock(64000000);
+ m_cpu->set_pixels_per_clock(1);
+ m_cpu->set_scanline_rgb32_callback(FUNC(isa16_ex1280_device::scanline_update));
+ m_cpu->set_shiftreg_in_callback(FUNC(isa16_ex1280_device::to_shiftreg)); /* write to shiftreg function */
+ m_cpu->set_shiftreg_out_callback(FUNC(isa16_ex1280_device::from_shiftreg)); /* read from shiftreg function */
+ m_cpu->set_screen(m_screen);
+
+ SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
+ m_screen->set_refresh_hz(60);
+ m_screen->set_vblank_time(ATTOSECONDS_IN_USEC(2500)); // Not accurate
+ m_screen->set_size(640, 480);
+ m_screen->set_visarea(0, 640-1, 0, 480-1);
+ m_screen->set_screen_update(m_cpu, FUNC(tms34010_device::tms340x0_rgb32));
+ m_screen->screen_vblank().set(FUNC(isa16_ex1280_device::vblank_w));
+
+ BT451(config, m_ramdac, 0);
+}
+
+
+//-------------------------------------------------
+// regs_r - register read handler
+//-------------------------------------------------
+
+READ16_MEMBER(isa16_ex1280_device::regs_r)
+{
+ uint16_t data = 0;
+ if (offset == 0)
+ {
+ data = m_flags;
+ }
+ else if (offset == 4)
+ {
+ data = 0x0000;
+ }
+ logerror("%s: regs_r: %08x: %04x & %04x\n", machine().describe_context(), 0x04000000 | (offset << 1), data, mem_mask);
+ return data;
+}
+
+
+//-------------------------------------------------
+// regs_w - register write handler
+//-------------------------------------------------
+
+WRITE16_MEMBER(isa16_ex1280_device::regs_w)
+{
+ logerror("%s: regs_w: %08x = %04x & %04x\n", machine().describe_context(), 0x04000000 | (offset << 1), data, mem_mask);
+}
+
+
+//-------------------------------------------------
+// vram_r - VRAM direct read handler
+//-------------------------------------------------
+
+READ16_MEMBER(isa16_ex1280_device::vram_r)
+{
+ logerror("vram_r: %08x = %04x\n", offset, m_vram[offset]);
+ return m_vram[offset];
+}
+
+
+//-------------------------------------------------
+// vram_r - VRAM direct write handler
+//-------------------------------------------------
+
+WRITE16_MEMBER(isa16_ex1280_device::vram_w)
+{
+ logerror("vram_r: %08x = %04x & %04x\n", offset, data, mem_mask);
+ COMBINE_DATA(&m_vram[offset]);
+}
+
+
+//-------------------------------------------------
+// scanline_update -
+//-------------------------------------------------
+
+TMS340X0_SCANLINE_RGB32_CB_MEMBER(isa16_ex1280_device::scanline_update)
+{
+ uint16_t *src = &m_vram[params->rowaddr << 8];
+ uint32_t *dest = &bitmap.pix32(scanline);
+ const pen_t *pens = m_ramdac->pens();
+ int coladdr = params->coladdr << 1;
+
+ /* copy the non-blanked portions of this scanline */
+ for (int x = params->heblnk; x < params->hsblnk; x += 4)
+ {
+ uint16_t pixels = src[coladdr++];
+ dest[x + 0] = pens[pixels & 0x0f];
+ dest[x + 1] = pens[(pixels >> 4) & 0x0f];
+ dest[x + 2] = pens[(pixels >> 8) & 0x0f];
+ dest[x + 3] = pens[(pixels >> 12) & 0x0f];
+ }
+}
+
+
+//-------------------------------------------------
+// to_shiftreg - handle VRAM->TMS shift register
+//-------------------------------------------------
+
+TMS340X0_TO_SHIFTREG_CB_MEMBER(isa16_ex1280_device::to_shiftreg)
+{
+ printf("address to shiftreg: %08x\n", address);
+ if (address < 0xa00000)
+ {
+ memcpy(shiftreg, &m_vram[address >> 4], 0x400);
+ }
+}
+
+
+//---------------------------------------------------
+// from_shiftreg - handle TMS shift register->VRAM
+//---------------------------------------------------
+
+TMS340X0_FROM_SHIFTREG_CB_MEMBER(isa16_ex1280_device::from_shiftreg)
+{
+ printf("address from shiftreg: %08x\n", address);
+ if (address < 0xa00000)
+ {
+ memcpy(&m_vram[address >> 4], shiftreg, 0x400);
+ }
+}
+
+
+//-------------------------------------------------
+// vblank_w - toggle vblank bit(?)
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER(isa16_ex1280_device::vblank_w)
+{
+ //m_flags &= ~(1 << 1);
+ //m_flags |= (state << 1);
+}
+
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+ROM_START( ex1280 )
+ ROM_REGION16_LE(0x8000, "ex1280", 0)
+ ROM_LOAD16_BYTE("hbv10lo.bin", 0x0000, 0x4000, CRC(4de578b8) SHA1(cd7bc7859dd44f978adca7506afb0a1a73cb1121) )
+ ROM_LOAD16_BYTE("hbv10hi.bin", 0x0001, 0x4000, CRC(b87caa0c) SHA1(88c19cf36cb98e59810dad2a2f1f0e6c884cd7eb) )
+ROM_END
+
+const tiny_rom_entry *isa16_ex1280_device::device_rom_region() const
+{
+ return ROM_NAME( ex1280 );
+}