diff options
Diffstat (limited to 'src/devices/bus/ti8x/bitsocket.cpp')
-rw-r--r-- | src/devices/bus/ti8x/bitsocket.cpp | 66 |
1 files changed, 45 insertions, 21 deletions
diff --git a/src/devices/bus/ti8x/bitsocket.cpp b/src/devices/bus/ti8x/bitsocket.cpp index bfe7849aa40..94149c0d642 100644 --- a/src/devices/bus/ti8x/bitsocket.cpp +++ b/src/devices/bus/ti8x/bitsocket.cpp @@ -1,14 +1,45 @@ // license:BSD-3-Clause // copyright-holders:Vas Crabb +/* + Sends raw assert/release signals over a socket. Seriously limits + transfer rates and probably won't work if there's much latency, but it + allows communication between instances using non-standard protocols. + + bit 0 = data + bit 1 = set tip + bit 2 = set ring + */ #include "emu.h" #include "bitsocket.h" +#include "imagedev/bitbngr.h" + + +namespace { + +class bit_socket_device + : public device_t + , public device_ti8x_link_port_interface +{ +public: + bit_socket_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock); -DEFINE_DEVICE_TYPE_NS(TI8X_BIT_SOCKET, bus::ti8x, bit_socket_device, "ti8x_bitsock", "TI-8x Bit Socket") +protected: + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + virtual void device_start() override ATTR_COLD; + virtual void input_tip(int state) override; + virtual void input_ring(int state) override; + + TIMER_CALLBACK_MEMBER(poll_tick); + +private: + required_device<bitbanger_device> m_stream; + emu_timer * m_poll_timer; + bool m_tip_in, m_ring_in; +}; -namespace bus { namespace ti8x { bit_socket_device::bit_socket_device( machine_config const &mconfig, @@ -33,7 +64,7 @@ void bit_socket_device::device_add_mconfig(machine_config &config) void bit_socket_device::device_start() { - m_poll_timer = timer_alloc(TIMER_ID_POLL); + m_poll_timer = timer_alloc(FUNC(bit_socket_device::poll_tick), this); save_item(NAME(m_tip_in)); save_item(NAME(m_ring_in)); @@ -44,38 +75,31 @@ void bit_socket_device::device_start() } -void bit_socket_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) +TIMER_CALLBACK_MEMBER(bit_socket_device::poll_tick) { - switch (id) + u8 data; + while (m_stream->input(&data, 1)) { - case TIMER_ID_POLL: - { - u8 data; - while (m_stream->input(&data, 1)) - { - if (BIT(data, 1)) output_tip(BIT(data, 0)); - if (BIT(data, 2)) output_ring(BIT(data, 0)); - } - } - break; - - default: - break; + if (BIT(data, 1)) output_tip(BIT(data, 0)); + if (BIT(data, 2)) output_ring(BIT(data, 0)); } } -WRITE_LINE_MEMBER(bit_socket_device::input_tip) +void bit_socket_device::input_tip(int state) { m_tip_in = bool(state); m_stream->output((m_tip_in ? 0x01 : 0x00) | 0x02); } -WRITE_LINE_MEMBER(bit_socket_device::input_ring) +void bit_socket_device::input_ring(int state) { m_ring_in = bool(state); m_stream->output((m_ring_in ? 0x01 : 0x00) | 0x04); } -} } // namespace bus::ti8x +} // anonymous namespace + + +DEFINE_DEVICE_TYPE_PRIVATE(TI8X_BIT_SOCKET, device_ti8x_link_port_interface, bit_socket_device, "ti8x_bitsock", "TI-8x Bit Socket") |