summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/robotron/k8915.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/robotron/k8915.cpp')
-rw-r--r--src/mame/robotron/k8915.cpp192
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 )