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dual68: Do terminal I/O through USART (nw)

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This commit is contained in:
AJR 2019-05-14 22:07:31 -04:00
parent 91cacec146
commit 2bfa972b63
2 changed files with 60 additions and 29 deletions
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5
src/devices/bus/rs232/rs232.h
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@ -22,6 +22,7 @@
#define RS232_BAUD_38400 (0x0b)
#define RS232_BAUD_57600 (0x0c)
#define RS232_BAUD_115200 (0x0d)
#define RS232_BAUD_7200 (0x0e)
#define MCFG_RS232_BAUD(_tag, _default_baud, _description, _class, _write_line) \
PORT_START(_tag) \
@ -33,6 +34,7 @@
PORT_CONFSETTING( RS232_BAUD_1200, "1200") \
PORT_CONFSETTING( RS232_BAUD_2400, "2400") \
PORT_CONFSETTING( RS232_BAUD_4800, "4800") \
PORT_CONFSETTING( RS232_BAUD_7200, "7200") \
PORT_CONFSETTING( RS232_BAUD_9600, "9600") \
PORT_CONFSETTING( RS232_BAUD_14400, "14400") \
PORT_CONFSETTING( RS232_BAUD_19200, "19200") \
@ -208,7 +210,8 @@ protected:
28800,
38400,
57600,
115200
115200,
7200
};
return values[baud];

84
src/mame/drivers/dual68.cpp
View File

@ -11,9 +11,10 @@
#include "emu.h"
#include "cpu/m68000/m68000.h"
#include "cpu/i8085/i8085.h"
#include "bus/rs232/rs232.h"
//#include "bus/s100/s100.h"
#include "machine/input_merger.h"
#include "machine/mc2661.h"
#include "machine/terminal.h"
class dual68_state : public driver_device
@ -22,52 +23,72 @@ public:
dual68_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_terminal(*this, "terminal")
, m_usart(*this, "usart%u", 1U)
, m_p_ram(*this, "ram")
{ }
void dual68(machine_config &config);
private:
void kbd_put(u8 data);
DECLARE_WRITE16_MEMBER(terminal_w);
uint8_t sio_direct_r(offs_t offset);
void sio_direct_w(offs_t offset, uint8_t data);
uint8_t sio_status_r();
uint8_t fdc_status_r();
void dual68_mem(address_map &map);
void sio4_io(address_map &map);
void sio4_mem(address_map &map);
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_device<generic_terminal_device> m_terminal;
required_device_array<mc2661_device, 4> m_usart;
required_shared_ptr<uint16_t> m_p_ram;
//uint8_t m_term_data;
};
WRITE16_MEMBER( dual68_state::terminal_w )
uint8_t dual68_state::sio_direct_r(offs_t offset)
{
m_terminal->write(data >> 8);
return m_usart[0]->read(offset);
}
void dual68_state::sio_direct_w(offs_t offset, uint8_t data)
{
m_usart[0]->write(offset, data);
}
uint8_t dual68_state::sio_status_r()
{
return 0x00;
}
uint8_t dual68_state::fdc_status_r()
{
return 0x40;
}
void dual68_state::dual68_mem(address_map &map)
{
map.unmap_value_high();
map(0x00000000, 0x0000ffff).ram().share("ram");
map(0x00080000, 0x00081fff).rom().region("user1", 0);
map(0x007f0000, 0x007f0001).w(FUNC(dual68_state::terminal_w));
map(0x00800000, 0x00801fff).rom().region("user1", 0);
map(0x000000, 0x00ffff).ram().share("ram");
map(0x080000, 0x081fff).rom().region("user1", 0);
map(0x7f0000, 0x7f0001).rw(FUNC(dual68_state::sio_direct_r), FUNC(dual68_state::sio_direct_w));
map(0x7f00c0, 0x7f00c0).r(FUNC(dual68_state::fdc_status_r));
map(0x800000, 0x801fff).rom().region("user1", 0);
}
void dual68_state::sio4_mem(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x07ff).rom();
map(0x0800, 0xffff).ram();
map(0x0000, 0x07ff).rom().region("siocpu", 0);
map(0x8000, 0x87ff).mirror(0x7800).ram();
//map(0xffe3, 0xffe3).lr8("usart0_rx_hack", []() { return 0x02; });
}
void dual68_state::sio4_io(address_map &map)
{
map.unmap_value_high();
map(0x06, 0x06).r(FUNC(dual68_state::sio_status_r));
map(0x18, 0x18).nopw();
map(0x20, 0x23).rw("usart1", FUNC(mc2661_device::read), FUNC(mc2661_device::write));
map(0x28, 0x2b).rw("usart2", FUNC(mc2661_device::read), FUNC(mc2661_device::write));
map(0x30, 0x33).rw("usart3", FUNC(mc2661_device::read), FUNC(mc2661_device::write));
@ -78,19 +99,16 @@ void dual68_state::sio4_io(address_map &map)
static INPUT_PORTS_START( dual68 )
INPUT_PORTS_END
static DEVICE_INPUT_DEFAULTS_START( terminal )
DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_7200 ) // FIXME: should be 9600 with actual 2661B
DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_7200 )
DEVICE_INPUT_DEFAULTS_END
void dual68_state::machine_reset()
{
uint8_t* user1 = memregion("user1")->base();
memcpy((uint8_t*)m_p_ram.target(),user1,0x2000);
m_maincpu->reset();
}
void dual68_state::kbd_put(u8 data)
{
//m_term_data = data;
}
void dual68_state::dual68(machine_config &config)
@ -103,14 +121,24 @@ void dual68_state::dual68(machine_config &config)
siocpu.set_addrmap(AS_PROGRAM, &dual68_state::sio4_mem);
siocpu.set_addrmap(AS_IO, &dual68_state::sio4_io);
/* video hardware */
GENERIC_TERMINAL(config, m_terminal, 0);
m_terminal->set_keyboard_callback(FUNC(dual68_state::kbd_put));
for (auto &usart : m_usart)
MC2661(config, usart, 9.8304_MHz_XTAL / 2); // SCN2661B
m_usart[0]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<0>));
m_usart[1]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<1>));
m_usart[2]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<2>));
m_usart[3]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<3>));
m_usart[0]->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
m_usart[0]->rts_handler().set("rs232", FUNC(rs232_port_device::write_rts));
m_usart[0]->dtr_handler().set("rs232", FUNC(rs232_port_device::write_dtr));
MC2661(config, "usart1", 9.8304_MHz_XTAL / 2); // SCN2661B
MC2661(config, "usart2", 9.8304_MHz_XTAL / 2); // SCN2661B
MC2661(config, "usart3", 9.8304_MHz_XTAL / 2); // SCN2661B
MC2661(config, "usart4", 9.8304_MHz_XTAL / 2); // SCN2661B
INPUT_MERGER_ANY_HIGH(config, "usartint").output_handler().set_inputline("siocpu", I8085_RST65_LINE);
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal"));
rs232.rxd_handler().set(m_usart[0], FUNC(mc2661_device::rx_w));
rs232.dsr_handler().set(m_usart[0], FUNC(mc2661_device::dsr_w));
rs232.dcd_handler().set(m_usart[0], FUNC(mc2661_device::dcd_w));
rs232.cts_handler().set(m_usart[0], FUNC(mc2661_device::cts_w));
rs232.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal));
}
/* ROM definition */