diff options
Diffstat (limited to 'src/devices/bus/ti8x/bitsocket.cpp')
-rw-r--r-- | src/devices/bus/ti8x/bitsocket.cpp | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/src/devices/bus/ti8x/bitsocket.cpp b/src/devices/bus/ti8x/bitsocket.cpp index 4168c09af91..46c832ffecd 100644 --- a/src/devices/bus/ti8x/bitsocket.cpp +++ b/src/devices/bus/ti8x/bitsocket.cpp @@ -1,14 +1,49 @@ // 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); + +protected: + enum + { + TIMER_ID_POLL = 1 + }; + + virtual void device_add_mconfig(machine_config &config) override; + virtual void device_start() override; + virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; -DEFINE_DEVICE_TYPE(TI8X_BIT_SOCKET, bus::ti8x::bit_socket_device, "ti8x_bitsock", "TI-8x Bit Socket") + virtual DECLARE_WRITE_LINE_MEMBER(input_tip) override; + virtual DECLARE_WRITE_LINE_MEMBER(input_ring) override; +private: + required_device<bitbanger_device> m_stream; + emu_timer * m_poll_timer; + bool m_tip_in, m_ring_in; +}; -namespace bus::ti8x { bit_socket_device::bit_socket_device( machine_config const &mconfig, @@ -78,4 +113,7 @@ WRITE_LINE_MEMBER(bit_socket_device::input_ring) 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") |