Sonic2-w.68k -

If you wish to explore this file yourself, follow this safe, legal path:

Pro tip: Search the file for labels like Obj_Ring (ring object) or PalCycle_Water (water palette) to see how the pros did it.

The Sega Mega Drive utilizes the Motorola 68000 (m68k) as its main processor. It runs at approximately 7.6 MHz and handles the main game logic, vertical interrupt (V-Int), and control of the Z80 sub-processor (which handles audio). sonic2-w.68k

If you open sonic2-w.68k in a text editor (like Notepad++ or VS Code), you aren't met with graphics or sound. You are met with pure logic. Here is a stylized example of what a snippet looks like:

; ---------------------------------------------------------------------------
; Subroutine to update Sonic's speed based on player input
; ---------------------------------------------------------------------------
Sonic_Control:
    move.w  ($FFFFF604).w,d0    ; Read controller input
    bclr    #0,d0               ; Check up direction
    beq.s   .not_up
    subq.w  #1,$10(a0)          ; Decrease Y velocity (jump/rise)
.not_up:
    jsr     (SpeedToPos).l       ; Convert speed to position
    rts

This is not C++. It is not Python. This is assembly language: the lowest human-readable form of code before raw binary. Inside sonic2-w.68k, you will find: If you wish to explore this file yourself,

You need an X68000 emulator and the correct system ROMs.