diff options
Diffstat (limited to 'src/devices/bus/acorn/system/vib.cpp')
-rw-r--r-- | src/devices/bus/acorn/system/vib.cpp | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/devices/bus/acorn/system/vib.cpp b/src/devices/bus/acorn/system/vib.cpp new file mode 100644 index 00000000000..c0d739fcbc4 --- /dev/null +++ b/src/devices/bus/acorn/system/vib.cpp @@ -0,0 +1,116 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Acorn Versatile Interface Board + + Part No. 200,009 + + http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Acorn_UIB.html + +**********************************************************************/ + + +#include "emu.h" +#include "vib.h" + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(ACORN_VIB, acorn_vib_device, "acorn_vib", "Acorn Versatile Interface Board") + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +MACHINE_CONFIG_START(acorn_vib_device::device_add_mconfig) + 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)); + MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics") + + 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)); +MACHINE_CONFIG_END + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// acorn_vib_device - constructor +//------------------------------------------------- + +acorn_vib_device::acorn_vib_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, ACORN_VIB, tag, owner, clock) + , device_acorn_bus_interface(mconfig, *this) + , m_ppi8255(*this, "ppi8255") + , m_via6522(*this, "via6522") + , m_acia(*this, "acia6850") + , m_acia_clock(*this, "acia_clock") + , m_centronics(*this, "centronics") + , m_rs232(*this, "rs232") + , m_irqs(*this, "irqs") +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void acorn_vib_device::device_start() +{ +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void acorn_vib_device::device_reset() +{ + set_acorn_bus_device(); + address_space &space = m_bus->memspace(); + + space.install_readwrite_handler(0x0c00, 0x0c0f, 0, 0x10, 0, read8_delegate(FUNC(via6522_device::read), m_via6522.target()), write8_delegate(FUNC(via6522_device::write), m_via6522.target())); + space.install_readwrite_handler(0x0c20, 0x0c21, 0, 0x1e, 0, read8_delegate(FUNC(acia6850_device::read), m_acia.target()), write8_delegate(FUNC(acia6850_device::write), m_acia.target())); + space.install_readwrite_handler(0x0c40, 0x0c43, 0, 0x1c, 0, read8_delegate(FUNC(i8255_device::read), m_ppi8255.target()), write8_delegate(FUNC(i8255_device::write), m_ppi8255.target())); +} + + +//************************************************************************** +// IMPLEMENTATION +//************************************************************************** + +WRITE_LINE_MEMBER(acorn_vib_device::write_acia_clock) +{ + m_acia->write_txc(state); + m_acia->write_rxc(state); +} + +WRITE_LINE_MEMBER(acorn_vib_device::irq_w) +{ + m_bus->irq_w(state); +} |