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https://github.com/holub/mame
synced 2025-04-23 08:49:55 +03:00
tv912.cpp: UART is now fully controlled (nw)
This also adds RCP/TCP line write control to AY-101x.
This commit is contained in:
AJR
parent
e4640f7cc3
commit
aa1147c08e
@ -628,6 +628,16 @@ void ay31015_device::set_input_pin( ay31015_input_pin_t pin, int data )
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switch (pin)
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{
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case AY31015_RCP:
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if (!m_pins[pin] && data)
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rx_process();
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m_pins[pin] = data;
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break;
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case AY31015_TCP:
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if (m_pins[pin] && !data)
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tx_process();
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m_pins[pin] = data;
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break;
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case AY31015_SWE:
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m_pins[pin] = data;
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update_status_pins();
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@ -19,6 +19,7 @@
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enum ay31015_input_pin_t
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{
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AY31015_SWE = 16, /* -SWE - Pin 16 - Status word enable */
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AY31015_RCP = 17, /* RCP - Pin 17 - Receiver clock pulse */
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AY31015_RDAV = 18, /* -RDAV - Pin 18 - Reset data available */
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AY31015_SI = 20, /* SI - Pin 20 - Serial input */
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AY31015_XR = 21, /* XR - Pin 21 - External reset */
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@ -27,7 +28,8 @@ enum ay31015_input_pin_t
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AY31015_TSB = 36, /* TSB - Pin 36 - Number of stop bits */
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AY31015_NB2 = 37, /* NB2 - Pin 37 - Number of bits #2 */
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AY31015_NB1 = 38, /* NB1 - Pin 38 - Number of bits #1 */
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AY31015_EPS = 39 /* EPS - Pin 39 - Odd/Even parity select */
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AY31015_EPS = 39, /* EPS - Pin 39 - Odd/Even parity select */
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AY31015_TCP = 40 /* TCP - Pin 40 - Transmitter clock pulse */
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};
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@ -10,11 +10,14 @@
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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.
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The baud rate switches are mounted vertically at the rear of the unit.
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Only one switch may be down (closed) at a time.
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*******************************************************************************/
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#include "emu.h"
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#include "cpu/mcs48/mcs48.h"
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//#include "bus/rs232/rs232.h"
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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 "sound/beep.h"
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@ -37,9 +40,13 @@ public:
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, m_dispram_bank(*this, "dispram")
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, m_p_chargen(*this, "chargen")
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, m_keys(*this, "KEY%u", 0)
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, m_modem_baud(*this, "MODEMBAUD")
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, m_printer_baud(*this, "PRINTBAUD")
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, m_uart_control(*this, "UARTCTRL")
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, m_modifiers(*this, "MODIFIERS")
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, m_jumpers(*this, "JUMPERS")
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, m_option(*this, "OPTION")
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, m_baudgen_timer(nullptr)
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{ }
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DECLARE_WRITE8_MEMBER(p1_w);
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@ -55,9 +62,18 @@ public:
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u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
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DECLARE_INPUT_CHANGED_MEMBER(uart_settings_changed);
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void tv912(machine_config &config);
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private:
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enum
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{
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TIMER_BAUDGEN
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};
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virtual void machine_start() override;
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virtual void machine_reset() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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required_device<cpu_device> m_maincpu;
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required_device<tms9927_device> m_crtc;
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@ -67,10 +83,17 @@ private:
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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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required_ioport_array<32> m_keys;
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required_ioport m_modem_baud;
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required_ioport m_printer_baud;
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required_ioport m_uart_control;
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required_ioport m_modifiers;
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required_ioport m_jumpers;
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required_ioport m_option;
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emu_timer *m_baudgen_timer;
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bool m_force_blank;
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bool m_lpt_select;
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u8 m_keyboard_scan;
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std::unique_ptr<u8[]> m_dispram;
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};
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@ -146,7 +169,11 @@ WRITE_LINE_MEMBER(tv912_state::uart_reset_w)
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WRITE8_MEMBER(tv912_state::output_40c)
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{
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// Bit 5: +FORCE BLANK
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m_force_blank = BIT(data, 5);
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// Bit 4: +SEL LPT
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m_lpt_select = BIT(data, 4);
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// Bit 3: -BREAK
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// Bit 2: -RQS
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@ -157,6 +184,29 @@ WRITE8_MEMBER(tv912_state::output_40c)
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m_dispram_bank->set_entry(BIT(data, 0));
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}
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void tv912_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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switch (id)
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{
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case TIMER_BAUDGEN:
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m_uart->set_input_pin(AY31015_RCP, param);
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m_uart->set_input_pin(AY31015_TCP, param);
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ioport_value sel = (m_lpt_select ? m_printer_baud : m_modem_baud)->read();
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for (int b = 0; b < 10; b++)
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{
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if (!BIT(sel, b))
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{
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unsigned divisor = 11 * (b < 9 ? 1 << b : 176);
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m_baudgen_timer->adjust(attotime::from_hz(XTAL_23_814MHz / 3.5 / divisor), !param);
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break;
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}
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}
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break;
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}
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}
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u32 tv912_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
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{
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return 0;
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@ -167,10 +217,26 @@ void tv912_state::machine_start()
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m_dispram = make_unique_clear<u8[]>(0x1000);
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m_dispram_bank->configure_entries(0, 2, m_dispram.get(), 0x800);
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m_baudgen_timer = timer_alloc(TIMER_BAUDGEN);
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m_baudgen_timer->adjust(attotime::zero, 0);
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save_item(NAME(m_force_blank));
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save_item(NAME(m_lpt_select));
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save_item(NAME(m_keyboard_scan));
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save_pointer(NAME(m_dispram.get()), 0x1000);
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}
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void tv912_state::machine_reset()
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{
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ioport_value uart_ctrl = m_uart_control->read();
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m_uart->set_input_pin(AY31015_NP, BIT(uart_ctrl, 4));
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m_uart->set_input_pin(AY31015_TSB, BIT(uart_ctrl, 3));
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m_uart->set_input_pin(AY31015_NB1, BIT(uart_ctrl, 2));
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m_uart->set_input_pin(AY31015_NB2, 1);
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m_uart->set_input_pin(AY31015_EPS, BIT(uart_ctrl, 0));
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m_uart->set_input_pin(AY31015_CS, 1);
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}
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static ADDRESS_MAP_START( prog_map, AS_PROGRAM, 8, tv912_state )
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AM_RANGE(0x000, 0xfff) AM_ROM AM_REGION("maincpu", 0)
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ADDRESS_MAP_END
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@ -190,7 +256,56 @@ static ADDRESS_MAP_START( bank_map, 0, 8, tv912_state )
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AM_RANGE(0x800, 0xfff) AM_RAMBANK("dispram")
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ADDRESS_MAP_END
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INPUT_CHANGED_MEMBER(tv912_state::uart_settings_changed)
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{
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ioport_value uart_ctrl = m_uart_control->read();
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m_uart->set_input_pin(AY31015_NP, BIT(uart_ctrl, 4));
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m_uart->set_input_pin(AY31015_TSB, BIT(uart_ctrl, 3));
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m_uart->set_input_pin(AY31015_NB1, BIT(uart_ctrl, 2));
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// S2:8 was probably connected to NB2 on earlier hardware revisions
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m_uart->set_input_pin(AY31015_EPS, BIT(uart_ctrl, 0));
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}
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static INPUT_PORTS_START( switches )
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PORT_START("MODEMBAUD")
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PORT_DIPNAME(0x3ff, 0x3fd, "Modem Port Baud Rate") PORT_DIPLOCATION("S1:1,2,3,4,5,6,7,8,9,10")
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PORT_DIPSETTING(0x2ff, "75") // actual rate: 1,208 ÷ 16 ≈ 75.5
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PORT_DIPSETTING(0x1ff, "110") // actual rate: 1,757 ÷ 16 ≈ 109.8
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PORT_DIPSETTING(0x37f, "150") // actual rate: 2,416 ÷ 16 ≈ 151
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PORT_DIPSETTING(0x3bf, "300") // actual rate: 4,832 ÷ 16 ≈ 302
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PORT_DIPSETTING(0x3df, "600") // actual rate: 9,665 ÷ 16 ≈ 604
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PORT_DIPSETTING(0x3ef, "1200") // actual rate: 19,330 ÷ 16 ≈ 1,208
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PORT_DIPSETTING(0x3f7, "2400") // actual rate: 38,659 ÷ 16 ≈ 2,416
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PORT_DIPSETTING(0x3fb, "4800") // actual rate: 77,318 ÷ 16 ≈ 4,832
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PORT_DIPSETTING(0x3fd, "9600") // actual rate: 154,636 ÷ 16 ≈ 9,665
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PORT_DIPSETTING(0x3fe, "19200") // actual rate: 309,273 ÷ 16 ≈ 19,330
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PORT_START("PRINTBAUD")
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PORT_DIPNAME(0x3ff, 0x3fd, "Printer Port Baud Rate") PORT_DIPLOCATION("S3:1,2,3,4,5,6,7,8,9,10")
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PORT_DIPSETTING(0x2ff, "75")
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PORT_DIPSETTING(0x1ff, "110")
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PORT_DIPSETTING(0x37f, "150")
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PORT_DIPSETTING(0x3bf, "300")
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PORT_DIPSETTING(0x3df, "600")
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PORT_DIPSETTING(0x3ef, "1200")
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PORT_DIPSETTING(0x3f7, "2400")
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PORT_DIPSETTING(0x3fb, "4800")
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PORT_DIPSETTING(0x3fd, "9600")
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PORT_DIPSETTING(0x3fe, "19200")
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PORT_START("UARTCTRL")
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PORT_DIPNAME(0x11, 0x11, "Parity Select") PORT_DIPLOCATION("S2:9,5") PORT_CHANGED_MEMBER(DEVICE_SELF, tv912_state, uart_settings_changed, nullptr)
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PORT_DIPSETTING(0x11, "None")
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PORT_DIPSETTING(0x01, "Even")
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PORT_DIPSETTING(0x00, "Odd")
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PORT_DIPNAME(0x08, 0x00, "Stop Bits") PORT_DIPLOCATION("S2:6") PORT_CHANGED_MEMBER(DEVICE_SELF, tv912_state, uart_settings_changed, nullptr)
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PORT_DIPSETTING(0x00, "1")
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PORT_DIPSETTING(0x08, "2")
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PORT_DIPNAME(0x04, 0x04, "Data Bits") PORT_DIPLOCATION("S2:7") PORT_CHANGED_MEMBER(DEVICE_SELF, tv912_state, uart_settings_changed, nullptr)
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PORT_DIPSETTING(0x00, "7")
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PORT_DIPSETTING(0x04, "8")
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PORT_DIPUNUSED_DIPLOC(0x02, 0x02, "S2:8")
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PORT_START("MODIFIERS")
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PORT_DIPNAME(0x80, 0x80, "Refresh Rate") PORT_DIPLOCATION("S2:4")
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PORT_DIPSETTING(0x00, "50 Hz")
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@ -637,6 +752,10 @@ MACHINE_CONFIG_START(tv912_state::tv912)
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MCFG_TMS9927_VSYN_CALLBACK(INPUTLINE("maincpu", MCS48_INPUT_IRQ))
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MCFG_DEVICE_ADD("uart", AY51013, 0)
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MCFG_AY51013_READ_SI_CB(DEVREADLINE("rs232", rs232_port_device, rxd_r))
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MCFG_AY51013_WRITE_SO_CB(DEVWRITELINE("rs232", rs232_port_device, write_txd))
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MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, nullptr)
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MCFG_SPEAKER_STANDARD_MONO("mono")
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MCFG_SOUND_ADD("beep", BEEP, XTAL_23_814MHz / 7 / 11 / 256) // nominally 1200 Hz (same clock as for 75 baud setting)
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