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https://github.com/holub/mame
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tv912b, tv912c: Driver updates
- Add Break key and allow system to transmit break when it is pressed - Add special input (not a keyboard key) to trigger Self Test Mode - Add support for blank attribute - Remove imperfect graphics flag - Remove some dead test code
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@ -10,9 +10,8 @@
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suffix indicated a typewriter-style keyboard. The TVI-920 added a row of
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function keys but was otherwise mostly identical to the TVI-912. The
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TVI-912C keyboard matrix and ribbon connector pinout are almost the same
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as in the TVI-910. The system self-test can be triggered by shorting two
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wires on the keyboard unit near the connector (TODO: figure out how to do
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this on the emulated system).
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as in the TVI-910. A self-test display pattern can be triggered by shorting
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two wires on the keyboard unit near the connector.
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Settings for these terminals are controlled by DIP switches, which are not
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read by the CPU except for those of S4 (which is usually left as a block of
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@ -57,16 +56,18 @@
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#include "bus/rs232/rs232.h"
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#include "machine/ay31015.h"
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#include "machine/bankdev.h"
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#include "machine/input_merger.h"
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#include "sound/beep.h"
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#include "video/tms9927.h"
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#include "screen.h"
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#include "speaker.h"
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#define TV912_CH_WIDTH 14
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#define CHARSET_TEST 0
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namespace {
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class tv912_state : public driver_device
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{
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static constexpr int TV912_CH_WIDTH = 14;
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public:
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tv912_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag)
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@ -75,6 +76,7 @@ public:
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, m_uart(*this, "uart")
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, m_rs232(*this, "rs232")
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, m_bankdev(*this, "bankdev")
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, m_txd_merger(*this, "txd")
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, m_beep(*this, "beep")
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, m_dispram_bank(*this, "dispram")
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, m_p_chargen(*this, "chargen")
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@ -130,6 +132,7 @@ private:
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required_device<ay51013_device> m_uart;
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required_device<rs232_port_device> m_rs232;
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required_device<address_map_bank_device> m_bankdev;
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required_device<input_merger_device> m_txd_merger;
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required_device<beep_device> m_beep;
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required_memory_bank m_dispram_bank;
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required_region_ptr<u8> m_p_chargen;
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@ -224,7 +227,7 @@ u8 tv912_state::uart_status_r(offs_t offset)
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void tv912_state::output_40c(u8 data)
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{
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// DB6: -PRTOL
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// DB6: -PRTOL (TODO)
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// DB5: +FORCE BLANK
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m_force_blank = BIT(data, 5);
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@ -233,6 +236,7 @@ void tv912_state::output_40c(u8 data)
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m_lpt_select = BIT(data, 4);
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// DB3: -BREAK
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m_txd_merger->in_w<1>(BIT(data, 3));
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// DB2: -RQS
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ioport_value dtr = m_dtr->read();
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@ -308,9 +312,6 @@ u32 tv912_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, cons
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? dispram[(row << 6) | pos]
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: dispram[0x600 | ((row & 0x07) << 6) | ((row & 0x18) << 1) | (pos & 0x0f)];
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if (CHARSET_TEST && pos >= 32 && pos < 64)
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ch = (pos & 0x1f) | (row & 7) << 5;
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bool inhibit = ra == 0 || ra == 9;
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bool underline = ra == 9 && BIT(charctrl, 0);
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bool invert = BIT(charctrl, 1);
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@ -326,6 +327,12 @@ u32 tv912_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, cons
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if (!BIT(ch, 1))
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invert = false;
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}
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else if ((charctrl & 0xc) == 0)
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{
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inhibit = true;
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underline = false;
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invert = false;
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}
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else if ((charctrl & 0xc) == 0xc && m_2hz_flasher)
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inhibit = true;
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@ -544,7 +551,7 @@ static INPUT_PORTS_START( tv912b )
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PORT_START("KEY3")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('.') PORT_CHAR('>') PORT_CODE(KEYCODE_STOP) PORT_CODE(KEYCODE_DEL_PAD)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('b') PORT_CHAR('B') PORT_CHAR(0x02) PORT_CODE(KEYCODE_B)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Self Test Mode")
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PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_START("KEY4")
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@ -638,7 +645,7 @@ static INPUT_PORTS_START( tv912b )
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PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_START("KEY19")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x9a (BREAK)
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Break") PORT_CODE(KEYCODE_DEL)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Line Feed") PORT_CHAR(0x0a) PORT_CODE(KEYCODE_INSERT)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
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PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
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@ -740,7 +747,7 @@ static INPUT_PORTS_START( tv912c )
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PORT_START("KEY3")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('.') PORT_CHAR('>') PORT_CODE(KEYCODE_STOP) PORT_CODE(KEYCODE_DEL_PAD)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('b') PORT_CHAR('B') PORT_CHAR(0x02) PORT_CODE(KEYCODE_B)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Self Test Mode")
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PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_START("KEY4")
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@ -834,7 +841,7 @@ static INPUT_PORTS_START( tv912c )
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PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_START("KEY19")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x9a (BREAK)
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Break") PORT_CODE(KEYCODE_DEL)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('[') PORT_CHAR(']') PORT_CHAR(0x1d) PORT_CODE(KEYCODE_CLOSEBRACE)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
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PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
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@ -941,9 +948,11 @@ void tv912_state::tv912(machine_config &config)
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AY51013(config, m_uart);
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m_uart->read_si_callback().set(m_rs232, FUNC(rs232_port_device::rxd_r));
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m_uart->write_so_callback().set(m_rs232, FUNC(rs232_port_device::write_txd));
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m_uart->write_so_callback().set(m_txd_merger, FUNC(input_merger_device::in_w<0>));
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m_uart->set_auto_rdav(true);
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INPUT_MERGER_ALL_HIGH(config, m_txd_merger).output_handler().set(m_rs232, FUNC(rs232_port_device::write_txd));
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RS232_PORT(config, m_rs232, default_rs232_devices, "loopback");
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SPEAKER(config, "mono").front_center();
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@ -976,5 +985,7 @@ ROM_START( tv912b )
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ROM_LOAD( "televideo912b_rom_a3.bin", 0x0000, 0x0800, CRC(bb9a7fbd) SHA1(5f1c4d41b25bd3ca4dbc336873362935daf283da) ) // AMI 8110QV (A3-2)
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ROM_END
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COMP( 1978, tv912c, 0, 0, tv912, tv912c, tv912_state, empty_init, "TeleVideo Systems", "TVI-912C", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_GRAPHICS ) // attributes not emulated
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COMP( 1978, tv912b, tv912c, 0, tv912, tv912b, tv912_state, empty_init, "TeleVideo Systems", "TVI-912B", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_GRAPHICS ) // attributes not emulated
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} // anonymous namespace
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COMP( 1978, tv912c, 0, 0, tv912, tv912c, tv912_state, empty_init, "TeleVideo Systems", "TVI-912C", MACHINE_NOT_WORKING )
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COMP( 1978, tv912b, tv912c, 0, tv912, tv912b, tv912_state, empty_init, "TeleVideo Systems", "TVI-912B", MACHINE_NOT_WORKING )
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