TRACE (Targeted Resource Access and Control Engine) is a very simple and minimal operating system written in C for the 32-bit i386 CPU Architecture with the GRUB bootloader. It currently supports GDT, IDT, PIT, has a simple keyboard driver, paging, serial I/O, user I/O, e.t.c. Everything is currently running in Ring 0 (Kernel), but switching to Ring 3 and back will be implemented soon (probably). It also has its own syscalls that can be called with int 0x80
| Number | Name | Arguments | Description |
|---|---|---|---|
| 0 | sys_write |
ebx: pointer to the buffer ecx: number of characters to write |
Write N characters from the pointer (buffer) to the screen |
| 1 | sys_read |
Read one character from the input buffer and store in eax |