Sonic the Hedgehog in early development; Sega R&D news footage from February 1990.

Some more partial source code from what looks like from FCOL.BAK.

??????  scatblwk,a2
    move.w  d0,d6
    andi.w  #7,d6
    lsl.w   #8,d0
    adda.w  d0,a2

    move.w  d2,d1
    lsr.w   #4,d1
    move.w  d3,d1
    rol.w   #1,d1
    andi.w  #$1e,d1
    addx.w  d1,d0

    swap    d4

furballs_dc said:
Sonic the Hedgehog in early development; Sega R&D news footage from February 1990.

Some more partial source code from what looks like from FCOL.BAK.

??????  scatblwk,a2
    move.w  d0,d6
    andi.w  #7,d6
    lsl.w   #8,d0
    adda.w  d0,a2

    move.w  d2,d1
    lsr.w   #4,d1
    move.w  d3,d1
    rol.w   #1,d1
    andi.w  #$1e,d1
    addx.w  d1,d0

    swap    d4

Was able to compile the code part. (26 bytes)

3C0002460007E148D4C03202E8493203E3590241001ED1414844

Not having luck with FCOL3_part.ASM still even with editing parts, though. :/

Much better versions now.

Sonic 1 prototype FCOL.BAK source code fragment

Sonic 1 prototype FCOL3.ASM source code fragment fixed

Replaced the spaces with proper taps, added partial comments to ;sprvo, ;sprho, ;sprvs, ;sprhs.

There is some jpn text which can be made out after inverting some frames near start of vid with file menu.