// 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); DECLARE_WRITE_LINE_MEMBER( i0_w ); DECLARE_WRITE_LINE_MEMBER( i1_w ); DECLARE_WRITE_LINE_MEMBER( i2_w ); DECLARE_WRITE_LINE_MEMBER( i3_w ); DECLARE_WRITE_LINE_MEMBER( i4_w ); 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); WRITE_LINE_MEMBER( pb0_w ) { port_line_w(m_in_b, 0, state); } WRITE_LINE_MEMBER( pb1_w ) { port_line_w(m_in_b, 1, state); } WRITE_LINE_MEMBER( pb2_w ) { port_line_w(m_in_b, 2, state); } WRITE_LINE_MEMBER( pb3_w ) { port_line_w(m_in_b, 3, state); } WRITE_LINE_MEMBER( pb4_w ) { port_line_w(m_in_b, 4, state); } WRITE_LINE_MEMBER( pb5_w ) { port_line_w(m_in_b, 5, state); } WRITE_LINE_MEMBER( pb6_w ) { port_line_w(m_in_b, 6, state); } WRITE_LINE_MEMBER( pb7_w ) { port_line_w(m_in_b, 7, state); } uint8_t get_ddr_a(); uint8_t get_ddr_b(); uint8_t get_ddr_c(); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; 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