There is only one syscall command for all these services, but which service is requested is determined by the values provided in certain registers. These services include support for printing integers and strings (similar to the printf() function in C), reading integers and strings from the keyboard (similar to scanf() in C), memory allocation (similar to malloc() in C), exiting from a program (similar to return from main() in C), etc.Īn assembly program accesses those services using the syscall command. These are called system calls, or syscall. There are several library routines provided by MARS that an assembly program can use. See where the final answer (largest Fibonacci less than 100) is stored in data memory. Follow the logic of the program and see where the Fibonacci numbers are stored. This program computes the largest Fibonacci number that is less than 100.
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