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+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic
+/***************************************************************************
+
+Galeb driver by Miodrag Milanovic
+
+2008-02-22 Preliminary driver.
+2008-02-23 Sound support added.
+2008-03-01 Updated to work with latest SVN code
+
+Driver is based on work of Josip Perusanec.
+
+Galeb (seagull) based on the OSI UK101. Due to its expense it is quite rare.
+It was succeeded by the Orao (eagle).
+
+All commands in Monitor and in Basic must be in UPPERCASE. So, the very first
+thing to do is to press ^A to enter caps mode.
+
+Commands:
+A nnnn Mini-assembler
+B
+C aaaabbbb show checksum of memory from a to b
+E aaaabbbb Hex dump from a to b
+F aaaabbbbcc Fill memory from a to b with c
+L Load tape
+M nnnn Modify memory starting at byte nnnn (enter to escape)
+P
+Q ccccaaaabbbb Copy memory range a to b, over to c
+R
+S
+T
+U nnnn Go to nnnn
+X nnnn disassemble
+$
+^A caps lock
+^B Start Basic
+^G keyclick
+^L clear screen
+Alt\
+
+
+Cassette:
+- Unable to locate a schematic, but it appears that a 6850 is the uart.
+ The UK101 used a 6850 and Kansas City tape encoding, and so it is assumed
+ that this computer is the same.
+
+Screen:
+- The T command can cause the system to expand the video to 4k
+ instead of 1k. Therefore the writing goes off the bottom and doesn't scroll.
+ It is not known if this is intentional, or a bug. The video routine has been
+ modified to cope, in case it's a real feature. (T 0000 0022 is an example)
+
+ToDo:
+- BASIC SAVE command is weird... need instructions
+- Therefore, cassette is considered to be not working.
+
+****************************************************************************/
+
+
+#include "emu.h"
+#include "cpu/m6502/m6502.h"
+#include "machine/clock.h"
+#include "screen.h"
+#include "speaker.h"
+#include "machine/6850acia.h"
+#include "machine/timer.h"
+#include "imagedev/cassette.h"
+#include "sound/dac.h"
+#include "emupal.h"
+
+namespace {
+
+class galeb_state : public driver_device
+{
+public:
+ galeb_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag)
+ , m_ram(*this, "mainram")
+ , m_vram(*this, "videoram")
+ , m_maincpu(*this, "maincpu")
+ , m_gfxdecode(*this, "gfxdecode")
+ , m_palette(*this, "palette")
+ , m_io_keyboard(*this, "LINE%u", 0U)
+ , m_cass(*this, "cassette")
+ , m_acia(*this, "acia")
+ , m_dac(*this, "dac")
+ { }
+
+ void galeb(machine_config &config);
+
+private:
+ TIMER_DEVICE_CALLBACK_MEMBER(kansas_w);
+ TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
+ void dac_w(u8 data);
+ u8 keyboard_r(offs_t offset);
+ u32 screen_update_galeb(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ u8 m_cass_data[4]{};
+ bool m_cassbit = false;
+ bool m_cassold = false;
+ required_shared_ptr<u8> m_ram;
+ required_shared_ptr<u8> m_vram;
+ required_device<cpu_device> m_maincpu;
+ required_device<gfxdecode_device> m_gfxdecode;
+ required_device<palette_device> m_palette;
+ required_ioport_array<8> m_io_keyboard;
+ required_device<cassette_image_device> m_cass;
+ required_device<acia6850_device> m_acia;
+ required_device<dac_1bit_device> m_dac;
+
+ void mem_map(address_map &map) ATTR_COLD;
+
+ virtual void machine_start() override ATTR_COLD;
+ virtual void machine_reset() override ATTR_COLD;
+
+ bool m_dac_state = false;
+};
+
+void galeb_state::machine_start()
+{
+ save_item(NAME(m_dac_state));
+ save_item(NAME(m_cass_data));
+ save_item(NAME(m_cassbit));
+ save_item(NAME(m_cassold));
+}
+
+void galeb_state::machine_reset()
+{
+ m_dac_state = 0;
+ m_dac->write(m_dac_state);
+}
+
+void galeb_state::dac_w(uint8_t data)
+{
+ m_dac_state ^= 1;
+ m_dac->write(m_dac_state);
+}
+
+u8 galeb_state::keyboard_r(offs_t offset)
+{
+ return m_io_keyboard[offset]->read();
+}
+
+TIMER_DEVICE_CALLBACK_MEMBER( galeb_state::kansas_w )
+{
+ m_cass_data[3]++;
+
+ if (m_cassbit != m_cassold)
+ {
+ m_cass_data[3] = 0;
+ m_cassold = m_cassbit;
+ }
+
+ if (m_cassbit)
+ m_cass->output(BIT(m_cass_data[3], 0) ? -1.0 : +1.0); // 2400Hz
+ else
+ m_cass->output(BIT(m_cass_data[3], 1) ? -1.0 : +1.0); // 1200Hz
+}
+
+TIMER_DEVICE_CALLBACK_MEMBER( galeb_state::kansas_r)
+{
+ /* cassette - turn 1200/2400Hz to a bit */
+ m_cass_data[1]++;
+ u8 cass_ws = (m_cass->input() > +0.03) ? 1 : 0;
+
+ if (cass_ws != m_cass_data[0])
+ {
+ m_cass_data[0] = cass_ws;
+ m_acia->write_rxd((m_cass_data[1] < 12) ? 1 : 0);
+ m_cass_data[1] = 0;
+ }
+}
+
+
+/* Address maps */
+void galeb_state::mem_map(address_map &map)
+{
+ map(0x0000, 0x1fff).ram().share("mainram");
+ map(0xb000, 0xbfdf).ram().share("videoram");
+ map(0xbfe0, 0xbfe7).r(FUNC(galeb_state::keyboard_r));
+ map(0xbfe0, 0xbfe0).w(FUNC(galeb_state::dac_w));
+ map(0xbffe, 0xbfff).rw(m_acia, FUNC(acia6850_device::read), FUNC(acia6850_device::write));
+ map(0xc000, 0xffff).rom().region("maincpu",0);
+}
+
+/* Input ports */
+static INPUT_PORTS_START( galeb )
+ PORT_START("LINE0")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Delete") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CTL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL)
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("GR") PORT_CODE(KEYCODE_LALT) PORT_CODE(KEYCODE_RALT)
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
+
+ PORT_START("LINE1")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('@')
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Down - Up") PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CHAR(UCHAR_MAMEKEY(UP))
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(':')
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('y') PORT_CHAR('Y')
+
+ PORT_START("LINE2")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(U'đ') PORT_CHAR(U'Đ')
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left - Right") PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(';') PORT_CHAR('+')
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('\"')
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
+
+ PORT_START("LINE3")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR(U'š') PORT_CHAR(U'Š')
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(U'ć') PORT_CHAR(U'Ć')
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR(U'ž') PORT_CHAR(U'Ž')
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
+
+ PORT_START("LINE4")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(U'č') PORT_CHAR(U'Č')
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
+
+ PORT_START("LINE5")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
+
+ PORT_START("LINE6")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED)
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
+
+ PORT_START("LINE7")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
+INPUT_PORTS_END
+
+const gfx_layout charlayout =
+{
+ 8, 8, /* 8x8 characters */
+ 256, /* 256 characters */
+ 1, /* 1 bits per pixel */
+ {0}, /* no bitplanes; 1 bit per pixel */
+ {7, 6, 5, 4, 3, 2, 1, 0},
+ {0 * 8, 1 * 8, 2 * 8, 3 * 8, 4 * 8, 5 * 8, 6 * 8, 7 * 8},
+ 8*8 /* size of one char */
+};
+
+static GFXDECODE_START( gfx_galeb )
+ GFXDECODE_ENTRY( "chargen", 0x0000, charlayout, 0, 1 )
+GFXDECODE_END
+
+u32 galeb_state::screen_update_galeb(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ u16 ma = (m_ram[0xff]*256+m_ram[0xfe]) & 0xfff;
+ if (ma < 0x400)
+ ma = 15;
+ else
+ ma -= 0x3bb;
+
+ for(u8 y = 0; y < 16; y++ )
+ {
+ for(u8 x = 0; x < 48; x++ )
+ {
+ u8 code = m_vram[ma + x + y*64];
+ m_gfxdecode->gfx(0)->opaque(bitmap,cliprect, code , 0, 0, 0, x*8,y*8);
+ }
+ }
+ return 0;
+}
+
+/* Machine driver */
+void galeb_state::galeb(machine_config &config)
+{
+ /* basic machine hardware */
+ M6502(config, m_maincpu, 1000000);
+ m_maincpu->set_addrmap(AS_PROGRAM, &galeb_state::mem_map);
+
+ /* video hardware */
+ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
+ screen.set_refresh_hz(50);
+ screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
+ screen.set_size(48*8, 16*8);
+ screen.set_visarea(0, 48*8-1, 0, 16*8-1);
+ screen.set_screen_update(FUNC(galeb_state::screen_update_galeb));
+ screen.set_palette(m_palette);
+
+ GFXDECODE(config, m_gfxdecode, m_palette, gfx_galeb);
+
+ PALETTE(config, m_palette, palette_device::MONOCHROME);
+
+ /* audio hardware */
+ SPEAKER(config, "mono").front_center();
+ DAC_1BIT(config, m_dac, 0).add_route(ALL_OUTPUTS, "mono", 0.0625); // unknown DAC
+
+ clock_device &acia_clock(CLOCK(config, "acia_clock", 4'800)); // 300 baud x 16(divider) = 4800
+ acia_clock.signal_handler().set(m_acia, FUNC(acia6850_device::write_txc));
+ acia_clock.signal_handler().append(m_acia, FUNC(acia6850_device::write_rxc));
+
+ ACIA6850(config, m_acia, 0);
+ m_acia->txd_handler().set([this] (bool state) { m_cassbit = state; });
+
+ /* cassette */
+ CASSETTE(config, m_cass);
+ m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
+ TIMER(config, "kansas_w").configure_periodic(FUNC(galeb_state::kansas_w), attotime::from_hz(4800)); // cass write
+ TIMER(config, "kansas_r").configure_periodic(FUNC(galeb_state::kansas_r), attotime::from_hz(40000)); // cass read
+}
+
+/* ROM definition */
+ROM_START( galeb )
+ ROM_REGION( 0x4000, "maincpu", ROMREGION_ERASEFF )
+ // BASIC ROMS
+ ROM_LOAD( "bas01.rom", 0x0000, 0x0800, CRC(9b19ed58) SHA1(ebfc27af8dbabfb233f9888e6a0a0dfc87ae1691) )
+ ROM_LOAD( "bas02.rom", 0x0800, 0x0800, CRC(3f320a84) SHA1(4ea082b4269dca6152426b1f720c7508122d3cb7) )
+ ROM_LOAD( "bas03.rom", 0x1000, 0x0800, CRC(f122ad10) SHA1(3c7c1dd67268230d179a00b0f8b35be80c2b7035) )
+ ROM_LOAD( "bas04.rom", 0x1800, 0x0800, CRC(b5372a83) SHA1(f93b73d98b943c6791f46617418fb5e4238d75bd) )
+ // MONITOR
+ ROM_LOAD( "exmd.rom", 0x3000, 0x0800, CRC(1bcb1375) SHA1(fda3361d238720a3d309644093da9832d5aff661) )
+ // SYSTEM
+ ROM_LOAD( "makbug.rom", 0x3800, 0x0800, CRC(91e38e79) SHA1(2b6439a09a470cda9c81b9d453c6380b99716989) )
+
+ ROM_REGION(0x0800, "chargen",0)
+ ROM_LOAD ("chrgen.bin", 0x0000, 0x0800, CRC(409a800e) SHA1(0efe429dd6c0568032636e691d9865a623afeb55) )
+ROM_END
+
+} // Anonymous namespace
+
+/* Driver */
+
+// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
+COMP( 1981, galeb, 0, 0, galeb, galeb, galeb_state, empty_init, "PEL Varazdin", "Galeb", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )