From 03f21234b8e8cfbffa8f0199696307246122de31 Mon Sep 17 00:00:00 2001 From: mahlemiut Date: Wed, 21 Jun 2017 18:34:36 +1200 Subject: - Add preliminary Yamaha YM3802 MIDI controller - Add X68000 expansion device using the YM3802 --- src/devices/machine/ym3802.h | 164 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 src/devices/machine/ym3802.h (limited to 'src/devices/machine/ym3802.h') diff --git a/src/devices/machine/ym3802.h b/src/devices/machine/ym3802.h new file mode 100644 index 00000000000..003c52a759f --- /dev/null +++ b/src/devices/machine/ym3802.h @@ -0,0 +1,164 @@ +// license:BSD-3-Clause +// copyright-holders:Barry Rodewald +/* + * ym3802.h - Yamaha YM3802/YM3523 MCS MIDI Communication and Service Controller + * + * * Registers: + * reg0 : IVR (read-only) + * reg1 : RGR (bit 8 = reset, bits 0-3 = register bank select) + * reg2 : ISR (read-only) + * reg3 : ICR (write-only) + * reg4-reg7 banked registers + * reg4 : IOR DMR RRR RSR TRR TSR FSR SRR GTR(L) EDR + * reg5 : IMR DCR RMR RCR TMR TCR FCR SCR GTR(H) --- + * reg6 : IER DSR AMR RDR --- TDR CCR SPR(L) MTR(L) EOR/EIR + * reg7 : --- DNR ADR --- --- --- CDR SPR(H) MTR(H) --- + */ + +#ifndef DEVICES_MACHINE_YM3802_H +#define DEVICES_MACHINE_YM3802_H + +#pragma once + +#include + +#define MCFG_YM3802_IRQ_HANDLER(_devcb) \ + devcb = &ym3802_device::set_irq_handler(*device, DEVCB_##_devcb); + +#define MCFG_YM3802_TXD_HANDLER(_devcb) \ + devcb = &ym3802_device::set_txd_handler(*device, DEVCB_##_devcb); + +class ym3802_device : public device_t, public device_serial_interface +{ +public: + // construction/destruction + ym3802_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + + // static configuration helpers + template static devcb_base &set_irq_handler(device_t &device, Object &&cb) { return downcast(device).m_irq_handler.set_callback(std::forward(cb)); } + template static devcb_base &set_txd_handler(device_t &device, Object &&cb) { return downcast(device).m_txd_handler.set_callback(std::forward(cb)); } + + DECLARE_READ8_MEMBER(read); + DECLARE_WRITE8_MEMBER(write); + + uint8_t vector() { return m_vector; } + +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: + enum + { + REG_IVR = 0, // Interrupt Vector (read only) + REG_RGR, // Register Group / System Control + REG_ISR, // Interrupt Service (read only) + REG_ICR, // Interrupt Clear (write only) + + REG_IOR, // Interrupt Vector Offset Request + REG_IMR, // Interrupt Mode Control + REG_IER, // Interrupt Enable Request + REG_UNUSED1, + + REG_DMR = 14, // Real Time Message Control + REG_DCR, // Real Time Message Request + REG_DSR, // FIFO IRx Data + REG_DNR, // FIFO IRx Control + + REG_RRR = 24, // Rx Rate + REG_RMR, // Rx Mode + REG_AMR, // Address Hunter Maker + REG_ADR, // Address Hunter Device + + REG_RSR = 34, // FIFO Rx Buffer Status + REG_RCR, // FIFO Rx Buffer Control + REG_RDR, // FIFO Rx Data + REG_UNUSED2, + + REG_TRR = 44, // Tx Rate + REG_TMR, // Tx Mode + REG_UNUSED3, + REG_UNUSED4, + + REG_TSR = 54, // FIFO Tx Status + REG_TCR, // FIFO Tx Control + REG_TDR, // FIFO Tx Data + REG_UNUSED5, + + REG_FSR = 64, // FSK status + REG_FCR, // FSK control + REG_CCR, // Click Counter Control + REG_CDR, // Click Counter Data (7-bit) + + REG_SRR = 74, // Recording Counter current value + REG_SCR, // Sequencer Control + REG_SPR_LOW, // Playback Counter (low 8-bits) + REG_SPR_HIGH, // Playback Counter (high 7-bits) + + REG_GTR_LOW = 84, // General Timer (low 8-bits) + REG_GTR_HIGH, // General Timer (high 6-bits) + REG_MTR_LOW, // MIDI Clock Timer (low 8-bits) + REG_MTR_HIGH, // MIDI Clock Timer (high 6-bits) + + REG_EDR = 94, // External I/O Direction + REG_EOR, // External I/O Output Data + REG_EIR, // External I/O Input Data + REG_UNUSED7, + + REG_MAX = 100 + }; + + enum + { + IRQ_MIDI_MSG = 0x01, + IRQ_CLICK = 0x02, + IRQ_MIDI_CLK = 0x02, + IRQ_PLAYBACK_COUNT = 0x04, + IRQ_RECORDING_COUNT = 0x08, + IRQ_OFFLINE = 0x10, + IRQ_BREAK = 0x10, + IRQ_FIFORX_RDY = 0x20, + IRQ_FIFOTX_EMPTY = 0x40, + IRQ_GENERAL_TIMER = 0x80 + }; + + enum + { + TIMER_SYSTEM_CLOCK = 0x200, // CLK input - anywhere from 1MHz up to 4MHz + TIMER_MIDI_CLOCK, // CLKM input - usually either 1MHz or 0.5MHz, or CLKF input - usually 614.4kHz + }; + + void transmit_clk(); + void reset_midi_timer(); + void set_comms_mode(); + void set_irq(uint8_t irq); + void reset_irq(uint8_t irq); + + devcb_write_line m_irq_handler; + devcb_write_line m_txd_handler; + devcb_read_line m_rxd_handler; + emu_timer* m_clock_timer; + emu_timer* m_midi_timer; + + std::vector m_reg; + uint8_t m_wdr; + uint64_t m_prev_rate; + uint8_t m_irq_status; + uint16_t m_general_counter; + uint16_t m_midi_counter; + uint8_t m_vector; + + std::queue m_tx_fifo; + std::queue m_rx_fifo; + std::queue m_itx_fifo; + std::queue m_irx_fifo; + bool m_tx_busy; + + uint64_t m_clkm_rate; + uint64_t m_clkf_rate; +}; + +DECLARE_DEVICE_TYPE(YM3802, ym3802_device) + +#endif // DEVICES_MACHINE_YM3802_H -- cgit v1.2.3-70-g09d2