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Diffstat (limited to 'src/devices/bus/ti8x/bitsocket.cpp')
-rw-r--r--src/devices/bus/ti8x/bitsocket.cpp66
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")