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Diffstat (limited to 'src/devices/bus/isa/ex1280.cpp')
-rw-r--r-- | src/devices/bus/isa/ex1280.cpp | 216 |
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..d96b9d74d53 --- /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 +//------------------------------------------------- + +uint16_t isa16_ex1280_device::regs_r(offs_t offset, uint16_t mem_mask) +{ + 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 +//------------------------------------------------- + +void isa16_ex1280_device::regs_w(offs_t offset, uint16_t data, uint16_t mem_mask) +{ + logerror("%s: regs_w: %08x = %04x & %04x\n", machine().describe_context(), 0x04000000 | (offset << 1), data, mem_mask); +} + + +//------------------------------------------------- +// vram_r - VRAM direct read handler +//------------------------------------------------- + +uint16_t isa16_ex1280_device::vram_r(offs_t offset) +{ + logerror("vram_r: %08x = %04x\n", offset, m_vram[offset]); + return m_vram[offset]; +} + + +//------------------------------------------------- +// vram_w - VRAM direct write handler +//------------------------------------------------- + +void isa16_ex1280_device::vram_w(offs_t offset, uint16_t data, uint16_t mem_mask) +{ + 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 const *const src = &m_vram[params->rowaddr << 8]; + uint32_t *const dest = &bitmap.pix(scanline); + pen_t const *const 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 const 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(?) +//------------------------------------------------- + +void isa16_ex1280_device::vblank_w(int state) +{ + //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 ); +} |