Background Scrolling Data Info

Foregrounds and backgrounds scroll differently in many levels, sometimes they have a fast speed ratio and sometimes they can be completely static, this can be changed via hex editing your level.

• Background only --> Change block 3 only.
• Foreground only --> Change block 5 only.
• Both --> Change both blocks 3 and 5.

• Byte 11: Control BG horizontal scrolling.
• Byte 13: Control BG vertical scrolling.

And for each byte:

• First Nybble: Control where the background starts when the player enters the views.
• Second Nybble: Control speed.

Data

• 0x0: Makes the BG completely static. Used in w2-3 (sewer level) for example.
• 0x1: Scroll slower than level. Used in most levels.
• 0x2: Scroll slower than level, maybe slower than 0x1?
• 0x3: Slightly faster than 0x2.
• 0x4: Scroll faster than level.
• 0x5: Approximately 3 times speed scrolling.
• 0x6: Extremely slow scroll, almost static to screen.
• 0x7: A little faster than 0x6.
• 0x8: Scroll slower than level, again?
• 0x9: Scroll exactly the same as level.
• 0x10: Scroll same as level.
• 0x11: Vertical started image at top half of level and horizontal/vertical scrolling is about mid speed.
• 0x30: Scroll same as level.
• 0xFF: Makes the BG scroll extremely fast.

Disabling vertical scrolling

• Background only --> Change both bytes 13 and 16 of block 3 only.
• Foreground only --> Change both bytes 13 and 16 of block 5 only.
• Both --> Change both bytes 13 and 16 of both blocks 3 and 5.

 

• Byte 13: enters 40.
• Byte 16: enters 10.

Automatic horizontal scrolling