Correct comment, delete related code to refine the readability.

[kira1928]

Correct comment, delete related code to fit the real logic.

jsnes/src/cpu.js

Lines 321 to 343 in 94f8744

	case 2: {
	// *******
	// * ASL *
	// *******
	// Shift left one bit
	if (addrMode === 4) {
	// ADDR_ACC = 4
	this.F_CARRY = (this.REG_ACC >> 7) & 1;
	this.REG_ACC = (this.REG_ACC << 1) & 255;
	this.F_SIGN = (this.REG_ACC >> 7) & 1;
	this.F_ZERO = this.REG_ACC;
	} else {
	temp = this.load(addr);
	this.F_CARRY = (temp >> 7) & 1;
	temp = (temp << 1) & 255;
	this.F_SIGN = (temp >> 7) & 1;
	this.F_ZERO = temp;
	this.write(addr, temp);
	}
	break;
	}

[bfirsh]

Hi @kira1928! Thanks for the contribution. Have you got some more details about what this change is and why it is not needed? A test to demonstrate the behavior would be really helpful.

[kira1928]

Hi @bfirsh !
Sorry, it's more than 2 years ago when I made that change. I don't remember clearly now XD.
It seems that in some address mode, the command parameter is passed by a "pointer variable", which is a memory address, while in another address mode, it's passed by a constant value.
the code I changed belongs to the latter.