diff options
Diffstat (limited to 'src/mame/ampex/ampex.cpp')
-rw-r--r-- | src/mame/ampex/ampex.cpp | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/src/mame/ampex/ampex.cpp b/src/mame/ampex/ampex.cpp new file mode 100644 index 00000000000..dbe81657865 --- /dev/null +++ b/src/mame/ampex/ampex.cpp @@ -0,0 +1,408 @@ +// license:BSD-3-Clause +// copyright-holders:AJR +/******************************************************************************* + +2017-11-05 Skeleton + +Ampex Dialogue 80 terminal + +Chips: CRT-5037, COM8017, SMC (COM)5016-5, MK3880N (Z80), SN74LS424N (TIM8224) +Crystals: 4.9152, 23.814 +Other: Beeper, 5x 10sw-dips. + +The program code seems to have been designed with a 8080 CPU in mind, using no +Z80-specific opcodes. This impression is reinforced by the IC types present on +the PCB, which go so far as to include the standard 8224 clock generator. + +*******************************************************************************/ + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "machine/ay31015.h" +#include "machine/com8116.h" +#include "video/tms9927.h" +#include "screen.h" + + +namespace { + +#define AMPEX_CH_WIDTH 7 + +class ampex_state : public driver_device +{ +public: + ampex_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) + , m_maincpu(*this, "maincpu") + , m_vtac(*this, "vtac") + , m_uart(*this, "uart") + , m_dbrg(*this, "dbrg") + , m_p_chargen(*this, "chargen") + { } + + void ampex(machine_config &config); + +private: + u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); + + void write_54xx(u8 data); + u8 read_5840(); + void write_5840(u8 data); + u8 read_5841(); + void write_5841(u8 data); + u8 read_5842(); + void write_5843(u8 data); + u8 read_5846(); + u8 read_5847(); + + u8 page_r(offs_t offset); + void page_w(offs_t offset, u8 data); + + void vsyn_w(int state); + void so_w(int state); + void dav_w(int state); + + void mem_map(address_map &map) ATTR_COLD; + + virtual void machine_start() override ATTR_COLD; + + u8 m_page = 0; + u8 m_attr = 0; + bool m_attr_readback = false; + bool m_uart_loopback = false; + std::unique_ptr<u16[]> m_paged_ram{}; + + required_device<cpu_device> m_maincpu; + required_device<crt5037_device> m_vtac; + required_device<ay31015_device> m_uart; + required_device<com8116_device> m_dbrg; + required_region_ptr<u8> m_p_chargen; +}; + +u32 ampex_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) +{ + return 0; +} + +void ampex_state::write_54xx(u8 data) +{ + // Written during keyboard polling +} + +u8 ampex_state::read_5840() +{ + logerror("%s: Read from 5840\n", machine().describe_context()); + return 0; +} + +void ampex_state::write_5840(u8 data) +{ + m_page = (data & 0x30) >> 4; + + logerror("%s: Write %02X to 5840\n", machine().describe_context(), data); +} + +u8 ampex_state::read_5841() +{ + u8 result = m_uart->dav_r() << 3; + result |= m_uart->or_r() << 4; + result |= m_uart->pe_r() << 5; + result |= m_uart->fe_r() << 6; + return result; +} + +void ampex_state::write_5841(u8 data) +{ + m_uart_loopback = BIT(data, 7); + m_attr_readback = BIT(data, 5); +} + +u8 ampex_state::read_5842() +{ + //logerror("%s: Read from 5842\n", machine().describe_context()); + return 0; +} + +void ampex_state::write_5843(u8 data) +{ + //logerror("%s: Write %02X to 5843\n", machine().describe_context(), data); + m_attr = (data & 0x78) >> 3; +} + +u8 ampex_state::read_5846() +{ + // probably acknowledges RST 6 interrupt (value not used) + return 0; +} + +u8 ampex_state::read_5847() +{ + // acknowledges RST 4/5 interrupt (value not used) + return 0; +} + +u8 ampex_state::page_r(offs_t offset) +{ + if (m_attr_readback) + return 0x87 | m_paged_ram[m_page * 0x1800 + offset] >> 5; + else + return 0xff & m_paged_ram[m_page * 0x1800 + offset]; +} + +void ampex_state::page_w(offs_t offset, u8 data) +{ + m_paged_ram[m_page * 0x1800 + offset] = data | m_attr << 8; +} + +void ampex_state::vsyn_w(int state) +{ + // should generate RST 6 interrupt +} + +void ampex_state::so_w(int state) +{ + if (m_uart_loopback) + m_uart->write_si(state); +} + +void ampex_state::dav_w(int state) +{ + // DAV should generate RST 7 +} + +void ampex_state::mem_map(address_map &map) +{ + map(0x0000, 0x2fff).rom().region("roms", 0); + map(0x4000, 0x43ff).ram(); // main RAM + map(0x4400, 0x53ff).ram(); // expansion RAM + map(0x5400, 0x5400).portr("IN0"); + map(0x5401, 0x5401).portr("IN1"); + map(0x5402, 0x5402).portr("IN2"); + map(0x5403, 0x5403).portr("IN3"); + map(0x5404, 0x5404).portr("IN4"); + map(0x5405, 0x5405).portr("IN5"); + map(0x5406, 0x5406).portr("IN6"); + map(0x5407, 0x5407).portr("IN7"); + map(0x5408, 0x5408).portr("IN8"); + map(0x5409, 0x5409).portr("IN9"); + map(0x540a, 0x540a).portr("INA"); + map(0x540b, 0x540b).portr("INB"); + map(0x540c, 0x540c).portr("INC"); + map(0x5400, 0x54ff).w(FUNC(ampex_state::write_54xx)); + map(0x5840, 0x5840).rw(FUNC(ampex_state::read_5840), FUNC(ampex_state::write_5840)); + map(0x5841, 0x5841).rw(FUNC(ampex_state::read_5841), FUNC(ampex_state::write_5841)); + map(0x5842, 0x5842).r(FUNC(ampex_state::read_5842)).w(m_uart, FUNC(ay31015_device::transmit)); + map(0x5843, 0x5843).r(m_uart, FUNC(ay31015_device::receive)).w(FUNC(ampex_state::write_5843)); + map(0x5846, 0x5846).r(FUNC(ampex_state::read_5846)); + map(0x5847, 0x5847).r(FUNC(ampex_state::read_5847)); + map(0x5c00, 0x5c0f).rw(m_vtac, FUNC(crt5037_device::read), FUNC(crt5037_device::write)); + map(0x8000, 0x97ff).rw(FUNC(ampex_state::page_r), FUNC(ampex_state::page_w)); + map(0xc000, 0xcfff).ram(); // video RAM +} + +static INPUT_PORTS_START( ampex ) + PORT_START("IN0") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('\\') PORT_CHAR('|') PORT_CODE(KEYCODE_TILDE) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('1') PORT_CHAR('!') PORT_CODE(KEYCODE_1) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('2') PORT_CHAR('"') PORT_CODE(KEYCODE_2) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('3') PORT_CHAR('#') PORT_CODE(KEYCODE_3) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('4') PORT_CHAR('$') PORT_CODE(KEYCODE_4) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('5') PORT_CHAR('%') PORT_CODE(KEYCODE_5) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('6') PORT_CHAR('&') PORT_CODE(KEYCODE_6) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('7') PORT_CHAR('\'') PORT_CODE(KEYCODE_7) + + PORT_START("IN1") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(0x1b) PORT_CODE(KEYCODE_TAB) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('q') PORT_CHAR('Q') PORT_CODE(KEYCODE_Q) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('w') PORT_CHAR('W') PORT_CODE(KEYCODE_W) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('e') PORT_CHAR('E') PORT_CODE(KEYCODE_E) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('r') PORT_CHAR('R') PORT_CODE(KEYCODE_R) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('t') PORT_CHAR('T') PORT_CODE(KEYCODE_T) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('y') PORT_CHAR('Y') PORT_CODE(KEYCODE_Y) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('u') PORT_CHAR('U') PORT_CODE(KEYCODE_U) + + PORT_START("IN2") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) PORT_CODE(KEYCODE_CAPSLOCK) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Ctrl") PORT_CHAR(UCHAR_SHIFT_2) PORT_CODE(KEYCODE_LCONTROL) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('a') PORT_CHAR('A') PORT_CODE(KEYCODE_A) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('s') PORT_CHAR('S') PORT_CODE(KEYCODE_S) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('d') PORT_CHAR('D') PORT_CODE(KEYCODE_D) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('f') PORT_CHAR('F') PORT_CODE(KEYCODE_F) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('g') PORT_CHAR('G') PORT_CODE(KEYCODE_G) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('h') PORT_CHAR('H') PORT_CODE(KEYCODE_H) + + PORT_START("IN3") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x83 (Break?) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Shift (Left)") PORT_CHAR(UCHAR_SHIFT_1) PORT_CODE(KEYCODE_LSHIFT) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('z') PORT_CHAR('Z') PORT_CODE(KEYCODE_Z) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('x') PORT_CHAR('X') PORT_CODE(KEYCODE_X) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('c') PORT_CHAR('C') PORT_CODE(KEYCODE_C) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('v') PORT_CHAR('V') PORT_CODE(KEYCODE_V) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('b') PORT_CHAR('B') PORT_CODE(KEYCODE_B) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('n') PORT_CHAR('N') PORT_CODE(KEYCODE_N) + + PORT_START("IN4") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('m') PORT_CHAR('M') PORT_CODE(KEYCODE_M) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(',') PORT_CHAR('<') PORT_CODE(KEYCODE_COMMA) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNUSED) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('.') PORT_CHAR('>') PORT_CODE(KEYCODE_STOP) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('/') PORT_CHAR('?') PORT_CODE(KEYCODE_SLASH) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Shift (Right)") PORT_CODE(KEYCODE_RSHIFT) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(' ') PORT_CODE(KEYCODE_SPACE) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("IN5") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('j') PORT_CHAR('J') PORT_CODE(KEYCODE_J) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('k') PORT_CHAR('K') PORT_CODE(KEYCODE_K) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('l') PORT_CHAR('L') PORT_CODE(KEYCODE_L) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(';') PORT_CHAR('+') PORT_CODE(KEYCODE_COLON) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('[') PORT_CHAR('{') PORT_CODE(KEYCODE_OPENBRACE) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(']') PORT_CHAR('}') PORT_CODE(KEYCODE_CLOSEBRACE) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x1f (shifted: 0x8a) (Page New Line?) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x94 (Line Ins?) + + PORT_START("IN6") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('i') PORT_CHAR('I') PORT_CODE(KEYCODE_I) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('o') PORT_CHAR('O') PORT_CODE(KEYCODE_O) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('p') PORT_CHAR('P') PORT_CODE(KEYCODE_P) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('^') PORT_CHAR('~') PORT_CODE(KEYCODE_QUOTE) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(0x0a) PORT_CODE(KEYCODE_RALT) PORT_NAME("Line Feed") + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(0x0d) PORT_CODE(KEYCODE_ENTER) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0xd4 (shifted: 0xf4) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0xd9 (shifted: 0xf9) + + PORT_START("IN7") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('8') PORT_CHAR('(') PORT_CODE(KEYCODE_8) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('9') PORT_CHAR(')') PORT_CODE(KEYCODE_9) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('0') PORT_CHAR('_') PORT_CODE(KEYCODE_0) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(':') PORT_CHAR('*') PORT_CODE(KEYCODE_MINUS) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('-') PORT_CHAR('=') PORT_CODE(KEYCODE_EQUALS) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('@') PORT_CHAR('`') PORT_CODE(KEYCODE_BACKSLASH) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(0x09) PORT_CODE(KEYCODE_BACKSPACE) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x90 (shifted: 0x84) + + PORT_START("IN8") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(ENTER_PAD)) PORT_CODE(KEYCODE_ENTER_PAD) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(DEL_PAD)) PORT_CODE(KEYCODE_DEL_PAD) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD)) PORT_CODE(KEYCODE_0_PAD) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(COMMA_PAD)) PORT_CODE(KEYCODE_COMMA_PAD) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x97 (Char Del?) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CODE(KEYCODE_DOWN) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x96 (Char Ins?) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("IN9") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x0d (top half of keypad Enter?) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(3_PAD)) PORT_CODE(KEYCODE_3_PAD) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(2_PAD)) PORT_CODE(KEYCODE_2_PAD) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD)) PORT_CODE(KEYCODE_1_PAD) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_CODE(KEYCODE_RIGHT) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(HOME)) PORT_CODE(KEYCODE_HOME) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Del") PORT_CODE(KEYCODE_RCONTROL) // 0x7f + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("INA") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(TAB_PAD)) PORT_CODE(KEYCODE_TAB_PAD) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(6_PAD)) PORT_CODE(KEYCODE_6_PAD) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD)) PORT_CODE(KEYCODE_5_PAD) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD)) PORT_CODE(KEYCODE_4_PAD) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x95 (Line Del?) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_CODE(KEYCODE_UP) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_CODE(KEYCODE_LEFT) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("INB") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(MINUS_PAD)) PORT_CODE(KEYCODE_MINUS_PAD) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(9_PAD)) PORT_CODE(KEYCODE_9_PAD) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(8_PAD)) PORT_CODE(KEYCODE_8_PAD) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(7_PAD)) PORT_CODE(KEYCODE_7_PAD) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x8b (shifted: 0x8c) (Clear?) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0xd0 (Page Erase?) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0xb4 (shifted: 0xb6) (Line Erase?) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("INC") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_UNUSED) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x87 (shifted: 0x86) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x85 (shifted: 0x84) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x89 (shifted: 0x88) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x92 (shifted: 0x93) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x91 + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0xb5 (shifted: 0xb7) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) +INPUT_PORTS_END + +void ampex_state::machine_start() +{ + m_page = 0; + m_attr = 0; + m_attr_readback = false; + m_uart_loopback = false; + m_paged_ram = std::make_unique<u16[]>(0x1800 * 4); + + m_uart->write_swe(0); + + // Are rates hardwired to DIP switches? They don't seem to be software-controlled... + m_dbrg->str_w(0xe); + m_dbrg->stt_w(0xe); + + // Make up some settings for the UART (probably also actually controlled by DIP switches) + m_uart->write_nb1(1); + m_uart->write_nb2(1); + m_uart->write_np(1); + m_uart->write_eps(1); + m_uart->write_tsb(0); + m_uart->write_cs(1); + + save_item(NAME(m_page)); + save_item(NAME(m_attr)); + save_item(NAME(m_attr_readback)); + save_item(NAME(m_uart_loopback)); + save_pointer(NAME(m_paged_ram), 0x1800 * 4); +} + +void ampex_state::ampex(machine_config &config) +{ + Z80(config, m_maincpu, 23.814_MHz_XTAL / 9); // clocked by 8224? + m_maincpu->set_addrmap(AS_PROGRAM, &ex_state::mem_map); + + screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); + screen.set_raw(23.814_MHz_XTAL / 2, 105 * AMPEX_CH_WIDTH, 0, 80 * AMPEX_CH_WIDTH, 270, 0, 250); + screen.set_screen_update(FUNC(ampex_state::screen_update)); + + CRT5037(config, m_vtac, 23.814_MHz_XTAL / 2 / AMPEX_CH_WIDTH); + m_vtac->set_char_width(AMPEX_CH_WIDTH); + m_vtac->vsyn_callback().set(FUNC(ampex_state::vsyn_w)); + m_vtac->set_screen("screen"); + + AY31015(config, m_uart, 0); // COM8017, actually + m_uart->write_so_callback().set(FUNC(ampex_state::so_w)); + m_uart->write_dav_callback().set(FUNC(ampex_state::dav_w)); + m_uart->set_auto_rdav(true); + + COM5016_5(config, m_dbrg, 4.9152_MHz_XTAL); + m_dbrg->fr_handler().set(m_uart, FUNC(ay31015_device::write_rcp)); + m_dbrg->ft_handler().set(m_uart, FUNC(ay31015_device::write_tcp)); +} + +ROM_START( dialog80 ) + ROM_REGION( 0x3000, "roms", 0 ) + ROM_LOAD( "3505240-01.u102", 0x0000, 0x0800, CRC(c5315780) SHA1(f2a8924f277d04bf4407f9b71b8d2788df0b1dc2) ) + ROM_LOAD( "3505240-02.u104", 0x0800, 0x0800, CRC(3fefa114) SHA1(d83c00605ae6c02d3aac7b572eb2bf615f0d4f3a) ) + ROM_LOAD( "3505240-03.u103", 0x1000, 0x0800, CRC(03abbcb2) SHA1(e5d382eefc3baff8f3e4d6b13219cb5eb1ca32f2) ) + ROM_LOAD( "3505240-04.u105", 0x1800, 0x0800, CRC(c051e15f) SHA1(16a066c39743ddf9a7da54bb8c03e2090d461862) ) + ROM_LOAD( "3505240-05.u100", 0x2000, 0x0800, CRC(6db6365b) SHA1(a68c83e554c2493645287e369749a07474723452) ) + ROM_LOAD( "3505240-06.u101", 0x2800, 0x0800, CRC(8f9a4969) SHA1(f9cd434f8d287c584cda429b45ca2537fdfb436b) ) + + ROM_REGION( 0x0800, "chargen", 0 ) + ROM_LOAD( "3505240-07.u69", 0x0000, 0x0800, CRC(838a16cb) SHA1(4301324b9fe9453c2d277972f9464c4214c6793d) ) + + ROM_REGION( 0x0200, "proms", 0 ) // unknown TI 16-pin DIPs + ROM_LOAD( "417129-010.u16", 0x0000, 0x0100, NO_DUMP ) + ROM_LOAD( "417129-010.u87", 0x0100, 0x0100, NO_DUMP ) +ROM_END + +} // anonymous namespace + + +COMP( 1980, dialog80, 0, 0, ampex, ampex, ampex_state, empty_init, "Ampex", "Dialogue 80", MACHINE_NO_SOUND | MACHINE_NOT_WORKING ) |