olemus
silumisotstarbeline katkestussignaal, mis väljastatakse iga käsu järel
= an interrupt signal for debugging purposes that is generated after each instruction

ülevaateid
https://en.wikipedia.org/wiki/Trap_flag#Single-step_interrupt

https://ghantasudhavani.files.wordpress.com/2018/06/lesson-ii-dedicated-interrupts8086.pdf