expad_keyboard.cpp

著名的任天堂FC游戏机模拟器VirtuaNes 085版的源码!

//////////////////////////////////////////////////////////////////////////
// Family Basic Keyboard                                                //
//////////////////////////////////////////////////////////////////////////
void	EXPAD_Keyboard::Reset()
{
	bGraph = FALSE;
	bOut = FALSE;
	ScanNo = 0;
}

BYTE	EXPAD_Keyboard::Read4016()
{
BYTE	data = 0;

	return	data;
}

BYTE	EXPAD_Keyboard::Read4017()
{
BYTE	data = 0xFF;

	if( DirectInput.m_Sw[DIK_NEXT ] ) bGraph = TRUE;
	if( DirectInput.m_Sw[DIK_PRIOR] ) bGraph = FALSE;

	switch( ScanNo ) {
		case	1:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F8      ] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_RETURN  ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_LBRACKET] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_RBRACKET] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_F12      ] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_RSHIFT   ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_BACKSLASH]
				 || DirectInput.m_Sw[DIK_YEN      ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_END      ] ) data &= ~0x10;
			}
			break;
		case	2:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F7       ] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_AT       ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_COLON    ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_SEMICOLON] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_UNDERLINE ] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_SLASH     ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_MINUS     ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_CIRCUMFLEX] ) data &= ~0x10;
			}
			break;
		case	3:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F6] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_O ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_L ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_K ] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_PERIOD] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_COMMA ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_P     ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_0     ] ) data &= ~0x10;
			}
			break;
		case	4:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F5] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_I ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_U ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_J ] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_M] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_N] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_9] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_8] ) data &= ~0x10;
			}
			break;
		case	5:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F4] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_Y ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_G ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_H ] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_B] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_V] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_7] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_6] ) data &= ~0x10;
			}
			break;
		case	6:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F3] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_T ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_R ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_D ] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_F] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_C] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_5] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_4] ) data &= ~0x10;
			}
			break;
		case	7:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F2] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_W ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_S ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_A ] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_X] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_Z] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_E] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_3] ) data &= ~0x10;
			}
			break;
		case	8:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_F1      ] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_ESCAPE  ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_Q       ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_LCONTROL]
				 || DirectInput.m_Sw[DIK_RCONTROL] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_LSHIFT] ) data &= ~0x02;
				if( bGraph                       ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_1     ] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_2     ] ) data &= ~0x10;
			}
			break;
		case	9:
			if( bOut ) {
				if( DirectInput.m_Sw[DIK_HOME ] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_UP   ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_RIGHT] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_LEFT ] ) data &= ~0x10;
			} else {
				if( DirectInput.m_Sw[DIK_DOWN  ] ) data &= ~0x02;
				if( DirectInput.m_Sw[DIK_SPACE ] ) data &= ~0x04;
				if( DirectInput.m_Sw[DIK_DELETE] ) data &= ~0x08;
				if( DirectInput.m_Sw[DIK_INSERT] ) data &= ~0x10;
			}
			break;
	}

	return	data;
}

void	EXPAD_Keyboard::Write4016( BYTE data )
{
	if( data == 0x05 ) {
		bOut = FALSE;
		ScanNo = 0;
	} else if( data == 0x04 ) {
		if( ++ScanNo > 9 )
			ScanNo = 0;
		bOut = !bOut;
	} else if( data == 0x06 ) {
		bOut = !bOut;
	}
}