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This commit is contained in:
arbee 2015-02-01 20:38:25 -05:00
parent ec0dbc3fed
commit 505bb73c1b
2 changed files with 20 additions and 24 deletions
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35
src/emu/bus/snes_ctrl/miracle.c
View File

@ -1,12 +1,13 @@
/**********************************************************************
Nintendo SNES - Miracle Piano Keyboard
TODO: ???
Super Nintendo Entertainment System - Miracle Piano Keyboard
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
recv at PC = 008a4a
xmit at PC = 008adb
**********************************************************************/
#include "miracle.h"
@ -60,7 +61,7 @@ void snes_miracle_device::device_timer(emu_timer &timer, device_timer_id id, int
//-------------------------------------------------
snes_miracle_device::snes_miracle_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, SNES_MIRACLE, "Miracle Piano Controller (SNES)", tag, owner, clock, "snes_miracle", __FILE__),
device_t(mconfig, SNES_MIRACLE, "Miracle Piano SNES Cable", tag, owner, clock, "snes_miracle", __FILE__),
device_serial_interface(mconfig, *this),
device_snes_control_port_interface(mconfig, *this),
m_midiin(*this, "mdin"),
@ -106,11 +107,6 @@ void snes_miracle_device::device_reset()
m_tx_busy = false;
}
//-------------------------------------------------
// read
//-------------------------------------------------
UINT8 snes_miracle_device::read_pin4()
{
UINT8 ret = 0;
@ -132,20 +128,18 @@ UINT8 snes_miracle_device::read_pin4()
return ret;
}
//-------------------------------------------------
// write
//-------------------------------------------------
// c4fc = start of recv routine
// c53a = start of send routine
void snes_miracle_device::write_pin6(UINT8 data)
{
// printf("%02x to pin6\n", data);
}
void snes_miracle_device::write_strobe(UINT8 data)
{
// printf("write: %d (%d %02x %d)\n", data & 1, m_sent_bits, m_data_sent, m_midi_mode);
// printf("%02x to strobe\n", data);
if (m_midi_mode == MIRACLE_MIDI_SEND)
{
//SNES writes (data & 1) to Miracle Piano!
// console writes (data & 1) to Miracle Piano.
// 1st write is data present flag (1=data present)
// next 8 writes are actual data bits (with ^1)
m_sent_bits++;
@ -177,7 +171,7 @@ void snes_miracle_device::write_strobe(UINT8 data)
{
// printf("got strobe at %d clocks\n", m_strobe_clock);
if (m_strobe_clock < 528 && data == 0)
if (m_strobe_clock < 500 && data == 0)
{
// short delay is recieve mode
m_midi_mode = MIRACLE_MIDI_RECEIVE;
@ -203,9 +197,10 @@ void snes_miracle_device::write_strobe(UINT8 data)
}
return;
}
else if (m_strobe_clock >= 528)
else if (m_strobe_clock >= 500)
{
// more than 528 clocks since strobe on write means send mode
// more than ~520 clocks since strobe on write means send mode
// (ranges from 522-528 have been seen)
m_midi_mode = MIRACLE_MIDI_SEND;
strobe_timer->reset();
m_strobe_on = 0;

7
src/emu/bus/snes_ctrl/miracle.h
View File

@ -1,6 +1,6 @@
/**********************************************************************
Nintendo Entertainment System - Miracle Piano Keyboard
Super Nintendo Entertainment System - Miracle Piano Keyboard
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
@ -51,8 +51,9 @@ protected:
virtual void device_start();
virtual void device_reset();
virtual UINT8 read_pin4();
virtual void write_strobe(UINT8 data);
UINT8 read_pin4();
void write_pin6(UINT8 data);
void write_strobe(UINT8 data);
static const device_timer_id TIMER_STROBE_ON = 0;
emu_timer *strobe_timer;