Display subsystem has following LEDs and seven-segment displays.
| Display Device | Function |
|---|---|
| OP (LED) | Light up when a program is running |
| P0~P4 (LED) | Execution clock phase |
| CF,VF,NF,ZF (LED) | Indicate conditions of Flags. If the flag is set, the corresponding LED will light up. |
| INF, IN (LED) | The input value by IN instruction in binary format |
| OUTF, OUT (LED) | The output value by OUT instruction in binary format |
| PC (7-segment) | Program Counter (PC) in hex format |
| IR (7-segment) | Instruction Register (IR) in hex format |
| ACC (7-segment) | ACC register in hex format |
| IX (7-segment) | IX register in hex format |
| MAR (7-segment) | Memory Address Register (MAR) in hex format |
| Address (7-segment) | Accessing address in hex format |