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// license:BSD-3-Clause
// copyright-holders:Peter Trauner
/*****************************************************************************
*
* machine/tpi6525.h
*
* mos tri port interface 6525
* mos triple interface adapter 6523
*
* peter.trauner@jk.uni-linz.ac.at
*
* used in commodore b series
* used in commodore c1551 floppy disk drive
*
* tia6523 is a tpi6525 without control register!?
*
* tia6523
* only some lines of port b and c are in the pinout!
*
* connector to floppy c1551 (delivered with c1551 as c16 expansion)
* port a for data read/write
* port b
* 0 status 0
* 1 status 1
* port c
* 6 dav output edge data on port a available
* 7 ack input edge ready for next datum
*
****************************************************************************/
#ifndef MAME_MACHINE_6525TPI_H
#define MAME_MACHINE_6525TPI_H
#pragma once
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
class tpi6525_device : public device_t
{
public:
tpi6525_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto out_irq_cb() { return m_out_irq_cb.bind(); }
auto in_pa_cb() { return m_in_pa_cb.bind(); }
auto out_pa_cb() { return m_out_pa_cb.bind(); }
auto in_pb_cb() { return m_in_pb_cb.bind(); }
auto out_pb_cb() { return m_out_pb_cb.bind(); }
auto in_pc_cb() { return m_in_pc_cb.bind(); }
auto out_pc_cb() { return m_out_pc_cb.bind(); }
auto out_ca_cb() { return m_out_ca_cb.bind(); }
auto out_cb_cb() { return m_out_cb_cb.bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
void i0_w(int state);
void i1_w(int state);
void i2_w(int state);
void i3_w(int state);
void i4_w(int state);
uint8_t pa_r();
uint8_t pb_r();
uint8_t pc_r();
void pa_w(uint8_t data);
void pb_w(uint8_t data);
void pc_w(uint8_t data);
void pb0_w(int state) { port_line_w(m_in_b, 0, state); }
void pb1_w(int state) { port_line_w(m_in_b, 1, state); }
void pb2_w(int state) { port_line_w(m_in_b, 2, state); }
void pb3_w(int state) { port_line_w(m_in_b, 3, state); }
void pb4_w(int state) { port_line_w(m_in_b, 4, state); }
void pb5_w(int state) { port_line_w(m_in_b, 5, state); }
void pb6_w(int state) { port_line_w(m_in_b, 6, state); }
void pb7_w(int state) { port_line_w(m_in_b, 7, state); }
protected:
// device-level overrides
virtual void device_start() override ATTR_COLD;
virtual void device_reset() override ATTR_COLD;
private:
// internal state
devcb_write_line m_out_irq_cb;
devcb_read8 m_in_pa_cb;
devcb_write8 m_out_pa_cb;
devcb_read8 m_in_pb_cb;
devcb_write8 m_out_pb_cb;
devcb_read8 m_in_pc_cb;
devcb_write8 m_out_pc_cb;
devcb_write_line m_out_ca_cb;
devcb_write_line m_out_cb_cb;
uint8_t m_port_a, m_ddr_a, m_in_a;
uint8_t m_port_b, m_ddr_b, m_in_b;
uint8_t m_port_c, m_ddr_c, m_in_c;
uint8_t m_ca_level, m_cb_level, m_interrupt_level;
uint8_t m_cr;
uint8_t m_air;
uint8_t m_irq_level[5];
void set_interrupt();
void clear_interrupt();
// helper function to write a single line
static void port_line_w(uint8_t &port, int line, int state);
};
DECLARE_DEVICE_TYPE(TPI6525, tpi6525_device)
#endif // MAME_MACHINE_6525TPI_H
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