doom_py/src/vizdoom/game-music-emu/gme/Nes_Cpu.cpp [662:854]:
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		fint16 carry = c >> 8 & 1;
		fint16 ov = (a ^ 0x80) + carry + (BOOST::int8_t) data; // sign-extend
		status &= ~st_v;
		status |= ov >> 2 & 0x40;
		c = nz = a + data + carry;
		pc++;
		a = (uint8_t) nz;
		goto loop;
	}
	
// Shift/rotate

	case 0x4A: // LSR A
		c = 0;
	case 0x6A: // ROR A
		nz = c >> 1 & 0x80;
		c = a << 8;
		nz |= a >> 1;
		a = nz;
		goto loop;

	case 0x0A: // ASL A
		nz = a << 1;
		c = nz;
		a = (uint8_t) nz;
		goto loop;

	case 0x2A: { // ROL A
		nz = a << 1;
		fint16 temp = c >> 8 & 1;
		c = nz;
		nz |= temp;
		a = (uint8_t) nz;
		goto loop;
	}
	
	case 0x5E: // LSR abs,X
		data += x;
	case 0x4E: // LSR abs
		c = 0;
	case 0x6E: // ROR abs
	ror_abs: {
		ADD_PAGE();
		FLUSH_TIME();
		int temp = READ( data );
		nz = (c >> 1 & 0x80) | (temp >> 1);
		c = temp << 8;
		goto rotate_common;
	}
	
	case 0x3E: // ROL abs,X
		data += x;
		goto rol_abs;
	
	case 0x1E: // ASL abs,X
		data += x;
	case 0x0E: // ASL abs
		c = 0;
	case 0x2E: // ROL abs
	rol_abs:
		ADD_PAGE();
		nz = c >> 8 & 1;
		FLUSH_TIME();
		nz |= (c = READ( data ) << 1);
	rotate_common:
		pc++;
		WRITE( data, (uint8_t) nz );
		CACHE_TIME();
		goto loop;
	
	case 0x7E: // ROR abs,X
		data += x;
		goto ror_abs;
	
	case 0x76: // ROR zp,x
		data = uint8_t (data + x);
		goto ror_zp;
	
	case 0x56: // LSR zp,x
		data = uint8_t (data + x);
	case 0x46: // LSR zp
		c = 0;
	case 0x66: // ROR zp
	ror_zp: {
		int temp = READ_LOW( data );
		nz = (c >> 1 & 0x80) | (temp >> 1);
		c = temp << 8;
		goto write_nz_zp;
	}
	
	case 0x36: // ROL zp,x
		data = uint8_t (data + x);
		goto rol_zp;
	
	case 0x16: // ASL zp,x
		data = uint8_t (data + x);
	case 0x06: // ASL zp
		c = 0;
	case 0x26: // ROL zp
	rol_zp:
		nz = c >> 8 & 1;
		nz |= (c = READ_LOW( data ) << 1);
		goto write_nz_zp;
	
// Increment/decrement

	case 0xCA: // DEX
		INC_DEC_XY( x, -1 )
	
	case 0x88: // DEY
		INC_DEC_XY( y, -1 )
	
	case 0xF6: // INC zp,x
		data = uint8_t (data + x);
	case 0xE6: // INC zp
		nz = 1;
		goto add_nz_zp;
	
	case 0xD6: // DEC zp,x
		data = uint8_t (data + x);
	case 0xC6: // DEC zp
		nz = (unsigned) -1;
	add_nz_zp:
		nz += READ_LOW( data );
	write_nz_zp:
		pc++;
		WRITE_LOW( data, nz );
		goto loop;
	
	case 0xFE: // INC abs,x
		data = x + GET_ADDR();
		goto inc_ptr;
	
	case 0xEE: // INC abs
		data = GET_ADDR();
	inc_ptr:
		nz = 1;
		goto inc_common;
	
	case 0xDE: // DEC abs,x
		data = x + GET_ADDR();
		goto dec_ptr;
	
	case 0xCE: // DEC abs
		data = GET_ADDR();
	dec_ptr:
		nz = (unsigned) -1;
	inc_common:
		FLUSH_TIME();
		nz += READ( data );
		pc += 2;
		WRITE( data, (uint8_t) nz );
		CACHE_TIME();
		goto loop;
		
// Transfer

	case 0xAA: // TAX
		x  = a;
		nz = a;
		goto loop;
		
	case 0x8A: // TXA
		a  = x;
		nz = x;
		goto loop;

	case 0x9A: // TXS
		SET_SP( x ); // verified (no flag change)
		goto loop;
	
	case 0xBA: // TSX
		x = nz = GET_SP();
		goto loop;
	
// Stack
	
	case 0x48: // PHA
		PUSH( a ); // verified
		goto loop;
		
	case 0x68: // PLA
		a = nz = READ_LOW( sp );
		sp = (sp - 0xFF) | 0x100;
		goto loop;
		
	case 0x40:{// RTI
		fuint8 temp = READ_LOW( sp );
		pc  = READ_LOW( 0x100 | (sp - 0xFF) );
		pc |= READ_LOW( 0x100 | (sp - 0xFE) ) * 0x100;
		sp = (sp - 0xFD) | 0x100;
		data = status;
		SET_STATUS( temp );
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doom_py/src/vizdoom/game-music-emu/gme/Sap_Cpu.cpp [607:799]:
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		fint16 carry = c >> 8 & 1;
		fint16 ov = (a ^ 0x80) + carry + (BOOST::int8_t) data; // sign-extend
		status &= ~st_v;
		status |= ov >> 2 & 0x40;
		c = nz = a + data + carry;
		pc++;
		a = (uint8_t) nz;
		goto loop;
	}
	
// Shift/rotate

	case 0x4A: // LSR A
		c = 0;
	case 0x6A: // ROR A
		nz = c >> 1 & 0x80;
		c = a << 8;
		nz |= a >> 1;
		a = nz;
		goto loop;

	case 0x0A: // ASL A
		nz = a << 1;
		c = nz;
		a = (uint8_t) nz;
		goto loop;

	case 0x2A: { // ROL A
		nz = a << 1;
		fint16 temp = c >> 8 & 1;
		c = nz;
		nz |= temp;
		a = (uint8_t) nz;
		goto loop;
	}
	
	case 0x5E: // LSR abs,X
		data += x;
	case 0x4E: // LSR abs
		c = 0;
	case 0x6E: // ROR abs
	ror_abs: {
		ADD_PAGE();
		FLUSH_TIME();
		int temp = READ( data );
		nz = (c >> 1 & 0x80) | (temp >> 1);
		c = temp << 8;
		goto rotate_common;
	}
	
	case 0x3E: // ROL abs,X
		data += x;
		goto rol_abs;
	
	case 0x1E: // ASL abs,X
		data += x;
	case 0x0E: // ASL abs
		c = 0;
	case 0x2E: // ROL abs
	rol_abs:
		ADD_PAGE();
		nz = c >> 8 & 1;
		FLUSH_TIME();
		nz |= (c = READ( data ) << 1);
	rotate_common:
		pc++;
		WRITE( data, (uint8_t) nz );
		CACHE_TIME();
		goto loop;
	
	case 0x7E: // ROR abs,X
		data += x;
		goto ror_abs;
	
	case 0x76: // ROR zp,x
		data = uint8_t (data + x);
		goto ror_zp;
	
	case 0x56: // LSR zp,x
		data = uint8_t (data + x);
	case 0x46: // LSR zp
		c = 0;
	case 0x66: // ROR zp
	ror_zp: {
		int temp = READ_LOW( data );
		nz = (c >> 1 & 0x80) | (temp >> 1);
		c = temp << 8;
		goto write_nz_zp;
	}
	
	case 0x36: // ROL zp,x
		data = uint8_t (data + x);
		goto rol_zp;
	
	case 0x16: // ASL zp,x
		data = uint8_t (data + x);
	case 0x06: // ASL zp
		c = 0;
	case 0x26: // ROL zp
	rol_zp:
		nz = c >> 8 & 1;
		nz |= (c = READ_LOW( data ) << 1);
		goto write_nz_zp;
	
// Increment/decrement

	case 0xCA: // DEX
		INC_DEC_XY( x, -1 )
	
	case 0x88: // DEY
		INC_DEC_XY( y, -1 )
	
	case 0xF6: // INC zp,x
		data = uint8_t (data + x);
	case 0xE6: // INC zp
		nz = 1;
		goto add_nz_zp;
	
	case 0xD6: // DEC zp,x
		data = uint8_t (data + x);
	case 0xC6: // DEC zp
		nz = (unsigned) -1;
	add_nz_zp:
		nz += READ_LOW( data );
	write_nz_zp:
		pc++;
		WRITE_LOW( data, nz );
		goto loop;
	
	case 0xFE: // INC abs,x
		data = x + GET_ADDR();
		goto inc_ptr;
	
	case 0xEE: // INC abs
		data = GET_ADDR();
	inc_ptr:
		nz = 1;
		goto inc_common;
	
	case 0xDE: // DEC abs,x
		data = x + GET_ADDR();
		goto dec_ptr;
	
	case 0xCE: // DEC abs
		data = GET_ADDR();
	dec_ptr:
		nz = (unsigned) -1;
	inc_common:
		FLUSH_TIME();
		nz += READ( data );
		pc += 2;
		WRITE( data, (uint8_t) nz );
		CACHE_TIME();
		goto loop;
		
// Transfer

	case 0xAA: // TAX
		x  = a;
		nz = a;
		goto loop;
		
	case 0x8A: // TXA
		a  = x;
		nz = x;
		goto loop;

	case 0x9A: // TXS
		SET_SP( x ); // verified (no flag change)
		goto loop;
	
	case 0xBA: // TSX
		x = nz = GET_SP();
		goto loop;
	
// Stack
	
	case 0x48: // PHA
		PUSH( a ); // verified
		goto loop;
		
	case 0x68: // PLA
		a = nz = READ_LOW( sp );
		sp = (sp - 0xFF) | 0x100;
		goto loop;
		
	case 0x40:{// RTI
		fuint8 temp = READ_LOW( sp );
		pc  = READ_LOW( 0x100 | (sp - 0xFF) );
		pc |= READ_LOW( 0x100 | (sp - 0xFE) ) * 0x100;
		sp = (sp - 0xFD) | 0x100;
		data = status;
		SET_STATUS( temp );
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