/*************************************************************************** MPU-401 MIDI device interface TODO: - skeleton, doesn't do anything ***************************************************************************/ #include "emu.h" #include "isa_mpu401.h" #include "machine/pic8259.h" /* DIP-SWs 1-2-3-4 0x200 1 0x210 1 0x220 ... 1 1 1 0x330 (default) ... 1 1 1 1 0x370 5-6-7-8 1 irq2 (default) 1 irq3 1 irq5 1 irq7 */ READ8_MEMBER( isa8_mpu401_device::mpu401_r ) { UINT8 res; if(offset == 0) // data { res = 0xff; } else // status { res = 0x3f | 0x80; // bit 7 queue empty (DSR), bit 6 DRR (Data Receive Ready?) } return res; } WRITE8_MEMBER( isa8_mpu401_device::mpu401_w ) { if(offset == 0) // data { printf("%02x %02x\n",offset,data); } else // command { printf("%02x %02x\n",offset,data); switch(data) { case 0xff: // reset //m_isa->irq2_w(1); break; } } } //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type ISA8_MPU401 = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // isa8_adlib_device - constructor //------------------------------------------------- isa8_mpu401_device::isa8_mpu401_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, ISA8_MPU401, "Roland MPU-401 Sound Card", tag, owner, clock), device_isa8_card_interface( mconfig, *this ) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void isa8_mpu401_device::device_start() { set_isa_device(); m_isa->install_device(0x330, 0x0331, 0, 0, read8_delegate(FUNC(isa8_mpu401_device::mpu401_r), this), write8_delegate(FUNC(isa8_mpu401_device::mpu401_w), this)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void isa8_mpu401_device::device_reset() { }