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Diffstat (limited to 'src/mame/robotron/k8915.cpp')
-rw-r--r-- | src/mame/robotron/k8915.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/src/mame/robotron/k8915.cpp b/src/mame/robotron/k8915.cpp new file mode 100644 index 00000000000..5ce10f47782 --- /dev/null +++ b/src/mame/robotron/k8915.cpp @@ -0,0 +1,192 @@ +// license:BSD-3-Clause +// copyright-holders:Miodrag Milanovic, Robbbert +/*************************************************************************** + +Robotron K8915 + +2010-08-30 + +When it says DIAGNOSTIC RAZ P, press enter. + +****************************************************************************/ + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "machine/z80ctc.h" +#include "machine/z80sio.h" +#include "bus/rs232/rs232.h" +#include "emupal.h" +#include "screen.h" + + +namespace { + +class k8915_state : public driver_device +{ +public: + k8915_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) + , m_maincpu(*this, "maincpu") + , m_rom(*this, "maincpu") + , m_ram(*this, "mainram") + , m_bank1(*this, "bank1") + , m_p_videoram(*this, "videoram") + , m_p_chargen(*this, "chargen") + { } + + void k8915(machine_config &config); + +private: + void k8915_a8_w(u8 data); + uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); + + void io_map(address_map &map) ATTR_COLD; + void mem_map(address_map &map) ATTR_COLD; + + u8 m_framecnt = 0U; + void machine_start() override ATTR_COLD; + void machine_reset() override ATTR_COLD; + required_device<cpu_device> m_maincpu; + required_region_ptr<u8> m_rom; + required_shared_ptr<u8> m_ram; + required_memory_bank m_bank1; + required_shared_ptr<u8> m_p_videoram; + required_region_ptr<u8> m_p_chargen; +}; + + +void k8915_state::k8915_a8_w(u8 data) +{ +// seems to switch ram and rom around. + m_bank1->set_entry((data == 0x87) ? 0 : 1); +} + +void k8915_state::mem_map(address_map &map) +{ + map.unmap_value_high(); + map(0x0000, 0x0fff).ram().share("mainram").bankr("bank1"); + map(0x1000, 0x17ff).ram().share("videoram"); + map(0x1800, 0xffff).ram(); +} + +void k8915_state::io_map(address_map &map) +{ + map.global_mask(0xff); + map(0x50, 0x53).rw("sio", FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); + map(0x58, 0x5b).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); + map(0xa8, 0xa8).w(FUNC(k8915_state::k8915_a8_w)); +} + +/* Input ports */ +static INPUT_PORTS_START( k8915 ) +INPUT_PORTS_END + +void k8915_state::machine_reset() +{ + m_bank1->set_entry(1); +} + +void k8915_state::machine_start() +{ + m_bank1->configure_entry(0, m_ram); + m_bank1->configure_entry(1, m_rom); + save_item(NAME(m_framecnt)); +} + +u32 k8915_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) +{ + u16 sy=0,ma=0; + + m_framecnt++; + + for (u8 y = 0; y < 25; y++) + { + for (u8 ra = 0; ra < 10; ra++) + { + u16 *p = &bitmap.pix(sy++); + + for (u16 x = ma; x < ma + 80; x++) + { + u8 gfx = 0; + + if (ra < 9) + { + u8 chr = m_p_videoram[x]; + + /* Take care of flashing characters */ + if ((chr & 0x80) && (m_framecnt & 0x08)) + chr = 0x20; + + chr &= 0x7f; + + gfx = m_p_chargen[(chr<<4) | ra ]; + } + + /* Display a scanline of a character */ + *p++ = BIT(gfx, 7); + *p++ = BIT(gfx, 6); + *p++ = BIT(gfx, 5); + *p++ = BIT(gfx, 4); + *p++ = BIT(gfx, 3); + *p++ = BIT(gfx, 2); + *p++ = BIT(gfx, 1); + *p++ = BIT(gfx, 0); + } + } + ma+=80; + } + return 0; +} + + +void k8915_state::k8915(machine_config &config) +{ + /* basic machine hardware */ + Z80(config, m_maincpu, XTAL(4'915'200) / 2); + m_maincpu->set_addrmap(AS_PROGRAM, &k8915_state::mem_map); + m_maincpu->set_addrmap(AS_IO, &k8915_state::io_map); + + /* video hardware */ + screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green())); + screen.set_refresh_hz(60); + screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ + screen.set_screen_update(FUNC(k8915_state::screen_update)); + screen.set_size(640, 250); + screen.set_visarea(0, 639, 0, 249); + screen.set_palette("palette"); + + PALETTE(config, "palette", palette_device::MONOCHROME); + + z80ctc_device& ctc(Z80CTC(config, "ctc", XTAL(4'915'200) / 2)); + ctc.set_clk<2>(XTAL(4'915'200) / 2); + ctc.zc_callback<2>().set("sio", FUNC(z80sio_device::rxtxcb_w)); + + z80sio_device& sio(Z80SIO(config, "sio", XTAL(4'915'200) / 2)); + sio.out_txdb_callback().set("rs232", FUNC(rs232_port_device::write_txd)); + sio.out_dtrb_callback().set("rs232", FUNC(rs232_port_device::write_dtr)); + sio.out_rtsb_callback().set("rs232", FUNC(rs232_port_device::write_rts)); + + rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "keyboard")); + rs232.rxd_handler().set("sio", FUNC(z80sio_device::rxb_w)); + rs232.dcd_handler().set("sio", FUNC(z80sio_device::dcdb_w)); + rs232.cts_handler().set("sio", FUNC(z80sio_device::ctsb_w)); +} + + +/* ROM definition */ +ROM_START( k8915 ) + ROM_REGION( 0x1000, "maincpu", 0 ) + ROM_LOAD( "k8915.bin", 0x0000, 0x1000, CRC(ca70385f) SHA1(a34c14adae9be821678aed7f9e33932ee1f3e61c)) + + /* character generator not dumped, using the one from 'c10' for now */ + ROM_REGION( 0x2000, "chargen", 0 ) + ROM_LOAD( "c10_char.bin", 0x0000, 0x2000, BAD_DUMP CRC(cb530b6f) SHA1(95590bbb433db9c4317f535723b29516b9b9fcbf)) +ROM_END + +} // anonymous namespace + + +/* Driver */ + +// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS +COMP( 1982, k8915, 0, 0, k8915, k8915, k8915_state, empty_init, "Robotron", "K8915", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE ) |