Hi, does anyone know how to gain access to devices such as an ethernet port on a mainboard or on a pci card? Are there special registers? Opcodes? Do I have to make a call to the OS? If so, how? Thanks in advance. ...
Hey all, I'm working on this final thing for my MIPS project and it's deceptively easy. I need to get a procedure (called feed) and let its main driver program use it by reading it in. I know that I'm supposed to use the call code 14 and .globl sym (I think) in order to feed it into the file and have it read it. I just need a basic tut...
We're writing a very simple program to execute on a processor we've built for a class. It doesn't have the capability to multiply or divide. We do however, had support for addition, subtraction, and, or, and branching for loop control (like branch on equal if you are familiar with MIPS). We were thinking a neat program to run on it would...
When I try working on unsigned integers in MIPS, the result of every operation I do remains signed (that is, the integers are all in 2's complement), even though every operation I perform is an unsigned one: addu, multu and so fourth... When I print numbers in the range [2^31, 2^32 - 1] I get their 'overflowed' negative value as if they...
I'm giving a try to MIPS Assembly by reading the MIPS Assembly Language Programming book, but I don't know the tools that are suggested and that are optional. What I need is Tools that are needed What is the best emulator and how to configure it? At the time I just have cross-compiled binutils targeted to mips-elf. I'm using Linux U...
I'm trying to learn MIPS Assembly by learning MIPS Assembly Language Programming. In the book I have this code(extracted from the page 37 of the book): .data prompt: .asciiz "\n Please Input a Value: " bye: .asciiz "\n Bye!" .globl main .text main: li $v0, 4 la $a0, prompt syscall li $v0, 5 syscall beqz $v0, end m...
I'm reading MIPS Assembly Language Programming, but now I want to build a simple "game" for Nintendo 64. I want to print a Hello, World to the screen, but someone can help with this. As I don't have nothing to start. I've choose for Nintendo 64 because of my friend told me that it uses MIPS and I've already have the emulator. ...
I'm learning MIPS Assembly by the book MIPS Assembly Language Programming, but my I've just started learning MIPS because I want to build a MIPS OS, but now as I can see, there isn't many documentation(I that isn't any) talking about boot and these things. Then I'm asking here for someone that have already done this to point me at the ri...
I know 8086 Assembly and learning MIPS Assembly. Also, I'm learning Regular Expressions, then I want to know: How can I use Regular Expressions on them? ...
I'm using JLime on my HP Jornada 720 that uses a ARM processor. I've already have a cross-compiled gcc for x86(arm-linux-gcc). The idea of what I want to do is very difficult to understand, then take a look at this chart: arm-linux-gcc(at my Ubuntu laptop) -> binutils to run on a ARM processor(targeted to compile mips-elf while on my...
Hello, I'm using pcspim simulator and my processor is an Intel x86 (little endian) As I understand, the declaration .word -5 should place in memory the following bytes 1111 1011 1111 1111 1111 1111 1111 1111 (little endian). But the simulator pcspim places this word in memory in a big-endian order it means: 1111 1111 1111 1111 1111 ...
In my mips assembly code, I used the multi instruction to multiply 2 large numbers since the result could not fit in one register. This means that the number is saved in the hi and lo special registers. My problem is how do I print the result of the multiplication. I can access hi and lo and put them in other registers (i.e. $t0, $t1)...
Hi, Do you know any device out there can set up a data trigger on a physical address in MIPS ? I am using FS2 but It can only set up a trigger on virtual address. ...
I am trying to have the function vbsme call another function called sad... is the following procedure correct about saving the registers and return address?? the caller is supposed to save register $t0-$t7, but where and how should I do that? vbsme: li $v0, 0 # reset $v0 li $v1, 0 # reset $v1 li $t0, 1 # i(row) = 1 ...
I understand that whenever I have a function that has more than four arguments in MIPS I should utilize the stack. However in my code below after saving the fifth argument at sw $t0, 4($sp) and do a jal sad, then right at the beginning of the sad function I adjust the stack pointer again to save the $sx registers that is used by the call...
I tried to do the following: andi $s7, $s6, 0x1 # (i + j) & 1 (to check if it's even) however it generates an error... am I doing something wrong? ...
Do you have any simple ways to make a value in a register in MIPS as an absolute value? ...
If I want to load a value from a memory which base address is at $a0 and off set $t2, why can't I do the following: lw $s2, $a1($t2) so what is the equivalent of the expression above? ...
I'm reading about division in MIPS and I've found that div Divides $s by $t and stores the quotient in $LO and the remainder in $HI http://www.mrc.uidaho.edu/mrc/people/jff/digital/MIPSir.html And Wikipedia says HI and LO are used to access the multiplier/divider results, accessed by the mfhi (move from high) and mflo com...
I don't have a syscall code in my MIPS instruction, however in the simulator I can see the following: I don't have any of the following code line in my .s li $v0 10 syscall Why is that? It's bothering me as it gives me a bad address in the syscall ...