will jump out of the loop as soon as x equals 10. If you subtract 10 from x, you’ll get a negative value until x equals 10 (and the value is 0). So using skpcond000 would be wrong as it would jump out too soon. So skpcond400 is correct. Perhaps it is easier to understand … Read more
Have you tried int 21h service 2? DL is the character to print. To print the integer value, you’ll have to write a loop to decompose the integer to individual characters. If you’re okay with printing the value in hex, this is pretty trivial. If you can’t rely on DOS services, you might also be … Read more
There is a generic concept generally called a “handle” in the context of computer software APIs. In the comments you have probably found a link to the Wikipedia article on that subject. You are dealing with a specific implementation of a handle data type — the IBM PC/DOS file handles returned from the int 0x21 interface. If you … Read more
JE and JZ are just different names for exactly the same thing: a conditional jump when ZF (the “zero” flag) is equal to 1. (Similarly, JNE and JNZ are just different names for a conditional jump when ZF is equal to 0.) You could use them interchangeably, but you should use them depending on what you are doing: JZ/JNZ are more appropriate when you are explicitly testing for something being equal … Read more
This link explains how to print to the screen in a MIPS simulator like QTSPIM or MARS. As for the code, there were a few bugs. The line li $a0, 0 is overwriting the work done by the initial la $a0, Array instruction because the li is setting the base address of your array to 0. Instead, you should move the la instruction into the loop so … Read more
It tests whether eax is 0, or above, or below. In this case, the jump is taken if eax is 0.
The addi instruction requires an immediate operand rather than a register, so the $0 would actually be 0: Both will work and have all the needed information encoded into the instruction itself): However, it would be more usual to just use the zero-locked $0 register in this particular case since that is, after all, its purpose. I would also tend to use the unsigned variant however, since I … Read more
Yes, You can use gcc to compile your asm code. Use -c for compilation like this: This will give object code file named file.o. To invoke linker perform following after above command:
2 I’m trying to write a simple code which save string and integer input into an array and then prints them (i will also later add another part which sorts them,but i have to get this to work first). With MARS i get this: line 75: Runtime exception at 0x004000e4: address out of range 0x00000008. … Read more
LEA means Load Effective Address MOV means Load Value In short, LEA loads a pointer to the item you’re addressing whereas MOV loads the actual value at that address. The purpose of LEA is to allow one to perform a non-trivial address calculation and store the result [for later usage] Where there are just constants … Read more