When Prison Break returned for its fourth season on , fans knew they were entering uncharted territory. The show had already accomplished two near-impossible breakouts—Fox River State Penitentiary and a hellish Panamanian prison called Sona. So where do you go from there? The answer, as revealed on that fall premiere date, was a complete shift in mission: from running from the law to taking down the shadowy conspiracy known as The Company.
Without that fall 2008 launch, the show’s emotional (and eventual resurrected) ending wouldn’t have happened. It was the air date that began the final chapter of the original Prison Break saga—until Season 5 surprised everyone in 2017.
Mark your calendars for September 1, 2008. That’s when the brothers traded prison jumpsuits for spy gear, and the race for the final break began.
Here’s a complete, standalone piece about the air date of Prison Break Season 4, including context, scheduling, and legacy. Prison Break Season 4 Air Date: The Beginning of the End for Michael Scofield
For fans revisiting the series on streaming, the September 1, 2008 air date marks a turning point. Season 4 is the most divisive of the original run—some love the "crew heist" dynamic (Michael, Lincoln, Sara, Mahone, Sucre, and Bellick working together), while others feel the conspiracy became too convoluted. Yet, that premiere date remains significant because it delivered what viewers had begged for: Michael Scofield finally operating in the light, using his genius to steal "Scylla" and avenge Sara's fake death.
This LMC simulator is based on the Little Man Computer (LMC) model of a computer, created by Dr. Stuart Madnick in 1965. LMC is generally used for educational purposes as it models a simple Von Neumann architecture computer which has all of the basic features of a modern computer. It is programmed using assembly code. You can find out more about this model on this wikipedia page.
You can read more about this LMC simulator on 101Computing.net.
Note that in the following table “xx” refers to a memory address (aka mailbox) in the RAM. The online LMC simulator has 100 different mailboxes in the RAM ranging from 00 to 99.
| Mnemonic | Name | Description | Op Code |
| INP | INPUT | Retrieve user input and stores it in the accumulator. | 901 |
| OUT | OUTPUT | Output the value stored in the accumulator. | 902 |
| LDA | LOAD | Load the Accumulator with the contents of the memory address given. | 5xx |
| STA | STORE | Store the value in the Accumulator in the memory address given. | 3xx |
| ADD | ADD | Add the contents of the memory address to the Accumulator | 1xx |
| SUB | SUBTRACT | Subtract the contents of the memory address from the Accumulator | 2xx |
| BRP | BRANCH IF POSITIVE | Branch/Jump to the address given if the Accumulator is zero or positive. | 8xx |
| BRZ | BRANCH IF ZERO | Branch/Jump to the address given if the Accumulator is zero. | 7xx |
| BRA | BRANCH ALWAYS | Branch/Jump to the address given. | 6xx |
| HLT | HALT | Stop the code | 000 |
| DAT | DATA LOCATION | Used to associate a label to a free memory address. An optional value can also be used to be stored at the memory address. |