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acorn_vib: Make ACIA transmit/receive clocks selectable using MC14411

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This commit is contained in:
AJR 2019-10-08 01:09:28 -04:00
parent 93355d2fc1
commit ecffb44944
2 changed files with 116 additions and 42 deletions
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149
src/devices/bus/acorn/system/vib.cpp
View File

@ -21,42 +21,6 @@
DEFINE_DEVICE_TYPE(ACORN_VIB, acorn_vib_device, "acorn_vib", "Acorn Versatile Interface Board")
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void acorn_vib_device::device_add_mconfig(machine_config &config)
{
INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set(FUNC(acorn_vib_device::irq_w));
VIA6522(config, m_via6522, XTAL(1'000'000));
m_via6522->writepa_handler().set("cent_data_out", FUNC(output_latch_device::bus_w));
m_via6522->ca2_handler().set(m_centronics, FUNC(centronics_device::write_strobe));
m_via6522->irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<0>));
CENTRONICS(config, m_centronics, centronics_devices, "printer");
m_centronics->ack_handler().set(m_via6522, FUNC(via6522_device::write_ca1));
m_centronics->busy_handler().set(m_via6522, FUNC(via6522_device::write_pa7));
output_latch_device &cent_data_out(OUTPUT_LATCH(config, "cent_data_out"));
m_centronics->set_output_latch(cent_data_out);
I8255(config, m_ppi8255, 0);
ACIA6850(config, m_acia, 0);
m_acia->txd_handler().set(m_rs232, FUNC(rs232_port_device::write_txd));
m_acia->rts_handler().set(m_rs232, FUNC(rs232_port_device::write_rts));
m_acia->irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<1>));
RS232_PORT(config, m_rs232, default_rs232_devices, nullptr);
m_rs232->rxd_handler().set(m_acia, FUNC(acia6850_device::write_rxd));
m_rs232->cts_handler().set(m_acia, FUNC(acia6850_device::write_cts));
m_rs232->dcd_handler().set(m_acia, FUNC(acia6850_device::write_dcd));
CLOCK(config, m_acia_clock, 1.8432_MHz_XTAL);
m_acia_clock->signal_handler().set(FUNC(acorn_vib_device::write_acia_clock));
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
@ -71,20 +35,72 @@ acorn_vib_device::acorn_vib_device(const machine_config &mconfig, const char *ta
, m_ppi8255(*this, "ppi8255")
, m_via6522(*this, "via6522")
, m_acia(*this, "acia6850")
, m_acia_clock(*this, "acia_clock")
, m_mc14411(*this, "mc14411")
, m_centronics(*this, "centronics")
, m_rs232(*this, "rs232")
, m_irqs(*this, "irqs")
, m_txc(*this, "TXC")
, m_rxc(*this, "RXC")
{
}
static INPUT_PORTS_START(acorn_vib)
PORT_START("TXC")
PORT_CONFNAME(0x0f, mc14411_device::TIMER_F1, "Transmit Rate")
PORT_CONFSETTING(mc14411_device::TIMER_F1, "9600")
PORT_CONFSETTING(mc14411_device::TIMER_F2, "7200")
PORT_CONFSETTING(mc14411_device::TIMER_F3, "4800")
PORT_CONFSETTING(mc14411_device::TIMER_F4, "3600")
PORT_CONFSETTING(mc14411_device::TIMER_F5, "2400")
PORT_CONFSETTING(mc14411_device::TIMER_F6, "1800")
PORT_CONFSETTING(mc14411_device::TIMER_F7, "1200")
PORT_CONFSETTING(mc14411_device::TIMER_F8, "600")
PORT_CONFSETTING(mc14411_device::TIMER_F9, "300")
PORT_CONFSETTING(mc14411_device::TIMER_F10, "200")
PORT_CONFSETTING(mc14411_device::TIMER_F11, "150")
PORT_CONFSETTING(mc14411_device::TIMER_F12, "134.5")
PORT_CONFSETTING(mc14411_device::TIMER_F13, "110")
PORT_CONFSETTING(mc14411_device::TIMER_F14, "75")
PORT_START("RXC")
PORT_CONFNAME(0x0f, mc14411_device::TIMER_F1, "Receive Rate")
PORT_CONFSETTING(mc14411_device::TIMER_F1, "9600")
PORT_CONFSETTING(mc14411_device::TIMER_F2, "7200")
PORT_CONFSETTING(mc14411_device::TIMER_F3, "4800")
PORT_CONFSETTING(mc14411_device::TIMER_F4, "3600")
PORT_CONFSETTING(mc14411_device::TIMER_F5, "2400")
PORT_CONFSETTING(mc14411_device::TIMER_F6, "1800")
PORT_CONFSETTING(mc14411_device::TIMER_F7, "1200")
PORT_CONFSETTING(mc14411_device::TIMER_F8, "600")
PORT_CONFSETTING(mc14411_device::TIMER_F9, "300")
PORT_CONFSETTING(mc14411_device::TIMER_F10, "200")
PORT_CONFSETTING(mc14411_device::TIMER_F11, "150")
PORT_CONFSETTING(mc14411_device::TIMER_F12, "134.5")
PORT_CONFSETTING(mc14411_device::TIMER_F13, "110")
PORT_CONFSETTING(mc14411_device::TIMER_F14, "75")
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - return a pointer to the implicit
// input ports description for this device
//-------------------------------------------------
ioport_constructor acorn_vib_device::device_input_ports() const
{
return INPUT_PORTS_NAME(acorn_vib);
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void acorn_vib_device::device_start()
{
m_acia->write_dcd(0);
m_mc14411->rsa_w(1);
m_mc14411->rsb_w(1);
}
//-------------------------------------------------
@ -99,6 +115,10 @@ void acorn_vib_device::device_reset()
space.install_device(0x0c10, 0x0c1f, *m_via6522, &via6522_device::map);
space.install_readwrite_handler(0x0c20, 0x0c21, 0, 0x1e, 0, read8sm_delegate(FUNC(acia6850_device::read), m_acia.target()), write8sm_delegate(FUNC(acia6850_device::write), m_acia.target()));
space.install_readwrite_handler(0x0c40, 0x0c43, 0, 0x1c, 0, read8sm_delegate(FUNC(i8255_device::read), m_ppi8255.target()), write8sm_delegate(FUNC(i8255_device::write), m_ppi8255.target()));
m_mc14411->timer_disable_all();
m_mc14411->timer_enable(mc14411_device::timer_id(m_txc->read()), true);
m_mc14411->timer_enable(mc14411_device::timer_id(m_rxc->read()), true);
}
@ -106,13 +126,64 @@ void acorn_vib_device::device_reset()
// IMPLEMENTATION
//**************************************************************************
template<mc14411_device::timer_id T>
WRITE_LINE_MEMBER(acorn_vib_device::write_acia_clock)
{
m_acia->write_txc(state);
m_acia->write_rxc(state);
if (T == m_txc->read())
m_acia->write_txc(state);
if (T == m_rxc->read())
m_acia->write_rxc(state);
}
WRITE_LINE_MEMBER(acorn_vib_device::irq_w)
{
m_bus->irq_w(state);
}
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void acorn_vib_device::device_add_mconfig(machine_config &config)
{
INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set(FUNC(acorn_vib_device::irq_w));
VIA6522(config, m_via6522, 1'000'000); // TODO: derive clock from bus (pin 29 = ϕ2)
m_via6522->writepa_handler().set("cent_data_out", FUNC(output_latch_device::bus_w));
m_via6522->ca2_handler().set(m_centronics, FUNC(centronics_device::write_strobe));
m_via6522->irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<0>));
CENTRONICS(config, m_centronics, centronics_devices, "printer");
m_centronics->ack_handler().set(m_via6522, FUNC(via6522_device::write_ca1));
m_centronics->busy_handler().set(m_via6522, FUNC(via6522_device::write_pa7));
output_latch_device &cent_data_out(OUTPUT_LATCH(config, "cent_data_out"));
m_centronics->set_output_latch(cent_data_out);
I8255(config, m_ppi8255);
ACIA6850(config, m_acia);
m_acia->txd_handler().set(m_rs232, FUNC(rs232_port_device::write_txd));
m_acia->rts_handler().set(m_rs232, FUNC(rs232_port_device::write_rts));
m_acia->irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<1>));
RS232_PORT(config, m_rs232, default_rs232_devices, nullptr);
m_rs232->rxd_handler().set(m_acia, FUNC(acia6850_device::write_rxd));
m_rs232->cts_handler().set(m_acia, FUNC(acia6850_device::write_cts));
MC14411(config, m_mc14411, 1.8432_MHz_XTAL);
m_mc14411->out_f<1>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F1>));
m_mc14411->out_f<2>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F2>));
m_mc14411->out_f<3>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F3>));
m_mc14411->out_f<4>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F4>));
m_mc14411->out_f<5>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F5>));
m_mc14411->out_f<6>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F6>));
m_mc14411->out_f<7>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F7>));
m_mc14411->out_f<8>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F8>));
m_mc14411->out_f<9>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F9>));
m_mc14411->out_f<10>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F10>));
m_mc14411->out_f<11>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F11>));
m_mc14411->out_f<12>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F12>));
m_mc14411->out_f<13>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F13>));
m_mc14411->out_f<14>().set(FUNC(acorn_vib_device::write_acia_clock<mc14411_device::TIMER_F14>));
}

9
src/devices/bus/acorn/system/vib.h
View File

@ -20,7 +20,7 @@
#include "machine/i8255.h"
#include "machine/6522via.h"
#include "machine/6850acia.h"
#include "machine/clock.h"
#include "machine/mc14411.h"
#include "machine/input_merger.h"
//**************************************************************************
@ -41,19 +41,22 @@ protected:
virtual void device_reset() override;
// optional information overrides
virtual ioport_constructor device_input_ports() const override;
virtual void device_add_mconfig(machine_config &config) override;
private:
DECLARE_WRITE_LINE_MEMBER(write_acia_clock);
template<mc14411_device::timer_id T> DECLARE_WRITE_LINE_MEMBER(write_acia_clock);
DECLARE_WRITE_LINE_MEMBER(irq_w);
required_device<i8255_device> m_ppi8255;
required_device<via6522_device> m_via6522;
required_device<acia6850_device> m_acia;
required_device<clock_device> m_acia_clock;
required_device<mc14411_device> m_mc14411;
required_device<centronics_device> m_centronics;
required_device<rs232_port_device> m_rs232;
required_device<input_merger_device> m_irqs;
required_ioport m_txc;
required_ioport m_rxc;
};