diff options
Diffstat (limited to 'src/devices/bus/acorn/system/econet.cpp')
-rw-r--r-- | src/devices/bus/acorn/system/econet.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/devices/bus/acorn/system/econet.cpp b/src/devices/bus/acorn/system/econet.cpp new file mode 100644 index 00000000000..01b4c6010be --- /dev/null +++ b/src/devices/bus/acorn/system/econet.cpp @@ -0,0 +1,88 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Acorn Econet Interface + + Part No. 200,024 + + http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Acorn_Econet.html + +**********************************************************************/ + +#include "emu.h" +#include "econet.h" + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(ACORN_ECONET, acorn_econet_device, "acorn_econet", "Acorn Econet Interface") + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +MACHINE_CONFIG_START(acorn_econet_device::device_add_mconfig) + /* econet */ + MCFG_DEVICE_ADD(m_adlc, MC6854, 0) + MCFG_MC6854_OUT_TXD_CB(WRITELINE(m_econet, econet_device, host_data_w)) + MCFG_MC6854_OUT_IRQ_CB(WRITELINE(*this, acorn_econet_device, bus_irq_w)) + + ECONET(config, m_econet, 0); + m_econet->clk_wr_callback().set(m_adlc, FUNC(mc6854_device::txc_w)); + m_econet->clk_wr_callback().append(m_adlc, FUNC(mc6854_device::rxc_w)); + m_econet->data_wr_callback().set(m_adlc, FUNC(mc6854_device::set_rx)); + MCFG_ECONET_SLOT_ADD("econet254", 254, econet_devices, nullptr) +MACHINE_CONFIG_END + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// acorn_econet_device - constructor +//------------------------------------------------- + +acorn_econet_device::acorn_econet_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, ACORN_ECONET, tag, owner, clock) + , device_acorn_bus_interface(mconfig, *this) + , m_adlc(*this, "mc6854") + , m_econet(*this, "econet") +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void acorn_econet_device::device_start() +{ +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void acorn_econet_device::device_reset() +{ + set_acorn_bus_device(); + address_space &space = m_bus->memspace(); + + space.install_readwrite_handler(0x1940, 0x1943, read8_delegate(FUNC(mc6854_device::read), m_adlc.target()), write8_delegate(FUNC(mc6854_device::write), m_adlc.target())); + space.install_read_handler(0x1944, 0x1944, read8_delegate(FUNC(acorn_econet_device::statid_r), this)); +} + +//************************************************************************** +// IMPLEMENTATION +//************************************************************************** + +READ8_MEMBER(acorn_econet_device::statid_r) +{ + return 0xfe; +} + +WRITE_LINE_MEMBER(acorn_econet_device::bus_irq_w) +{ + m_bus->irq_w(state); +} |