// license:BSD-3-Clause // copyright-holders:Olivier Galibert #ifndef MAME_MACHINE_AMIGAFDC_H #define MAME_MACHINE_AMIGAFDC_H #pragma once #include "imagedev/floppy.h" #define MCFG_AMIGA_FDC_INDEX_CALLBACK(_write) \ devcb = &downcast(*device).set_index_wr_callback(DEVCB_##_write); #define MCFG_AMIGA_FDC_READ_DMA_CALLBACK(_read) \ devcb = &downcast(*device).set_dma_rd_callback(DEVCB_##_read); #define MCFG_AMIGA_FDC_WRITE_DMA_CALLBACK(_write) \ devcb = &downcast(*device).set_dma_wr_callback(DEVCB_##_write); #define MCFG_AMIGA_FDC_DSKBLK_CALLBACK(_write) \ devcb = &downcast(*device).set_dskblk_wr_callback(DEVCB_##_write); #define MCFG_AMIGA_FDC_DSKSYN_CALLBACK(_write) \ devcb = &downcast(*device).set_dsksyn_wr_callback(DEVCB_##_write); class amiga_fdc_device : public device_t { public: amiga_fdc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); template devcb_base &set_index_wr_callback(Object &&cb) { return m_write_index.set_callback(std::forward(cb)); } template devcb_base &set_dma_rd_callback(Object &&cb) { return m_read_dma.set_callback(std::forward(cb)); } template devcb_base &set_dma_wr_callback(Object &&cb) { return m_write_dma.set_callback(std::forward(cb)); } template devcb_base &set_dskblk_wr_callback(Object &&cb) { return m_write_dskblk.set_callback(std::forward(cb)); } template devcb_base &set_dsksyn_wr_callback(Object &&cb) { return m_write_dsksyn.set_callback(std::forward(cb)); } DECLARE_WRITE8_MEMBER(ciaaprb_w); uint8_t ciaapra_r(); uint16_t dskbytr_r(); uint16_t dskpth_r(); uint16_t dskptl_r(); void dsksync_w(uint16_t data); void dskpth_w(uint16_t data); void dskptl_w(uint16_t data); void dsklen_w(uint16_t data); void adkcon_set(uint16_t data); void dmacon_set(uint16_t data); uint16_t adkcon_r(void); DECLARE_FLOPPY_FORMATS( floppy_formats ); protected: virtual void device_start() override; virtual void device_reset() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; private: // Running states enum { IDLE, RUNNING, RUNNING_SYNCPOINT }; // DMA states enum { DMA_IDLE, DMA_WAIT_START, DMA_RUNNING_BYTE_0, DMA_RUNNING_BYTE_1 }; struct pll_t { uint16_t counter; uint16_t increment; uint16_t transition_time; uint8_t history; uint8_t slot; uint8_t phase_add, phase_sub, freq_add, freq_sub; attotime ctime; attotime delays[38]; attotime write_start_time; attotime write_buffer[32]; int write_position; void set_clock(const attotime &period); void reset(const attotime &when); int get_next_bit(attotime &tm, floppy_image_device *floppy, const attotime &limit); bool write_next_bit(bool bit, attotime &tm, floppy_image_device *floppy, const attotime &limit); void start_writing(const attotime &tm); void commit(floppy_image_device *floppy, const attotime &tm); void stop_writing(floppy_image_device *floppy, const attotime &tm); }; struct live_info { attotime tm; int state, next_state; uint16_t shift_reg; int bit_counter; pll_t pll; }; devcb_write_line m_write_index; devcb_read16 m_read_dma; devcb_write16 m_write_dma; devcb_write_line m_write_dskblk; devcb_write_line m_write_dsksyn; output_finder<2> m_leds; floppy_image_device *floppy; floppy_image_device *floppy_devices[4]; live_info cur_live, checkpoint_live; emu_timer *t_gen; uint16_t dsklen, pre_dsklen, dsksync, dskbyt, adkcon, dmacon; uint32_t dskpt; uint16_t dma_value; int dma_state; void setup_leds(); void index_callback(floppy_image_device *floppy, int state); bool dma_enabled(); void dma_check(); void dma_done(); void dma_write(uint16_t value); uint16_t dma_read(); void live_start(); void checkpoint(); void rollback(); void live_delay(int state); void live_sync(); void live_abort(); void live_run(const attotime &limit = attotime::never); }; DECLARE_DEVICE_TYPE(AMIGA_FDC, amiga_fdc_device) #endif // MAME_MACHINE_AMIGAFDC_H