SYSCALL_INTERRUPT EQU 80h

SYSCALL_UNKNOWN EQU 0
SYSCALL_CLEAR_SCREEN EQU 1
SYSCALL_READ_CHAR EQU 2
SYSCALL_READ_LINE EQU 3
SYSCALL_PRINT_CHAR EQU 4
SYSCALL_PRINT_STRING EQU 5
SYSCALL_NEWLINE EQU 6
SYSCALL_INVALID EQU 7