Sonic the Hedgehog CD (Aug 1, 1993 prototype)
|Sonic the Hedgehog CD (Aug 1, 1993 prototype)|
|Download Sonic the Hedgehog CD (Aug 1, 1993 prototype) (info)|
A late prototype of Sonic the Hedgehog CD for the Sega CD.
- Another copy of this prototype was found on another CD-R. The new copy is a perfect match for the previous dump. A scan of the new CD can be found below.
- Level select can be activated at the title screen by pressing B
- Minor code changes in all files.
- Wacky Workbench Act 2 (Past and Good Future) and Stardust Speedway Act 2 (Present and Good Future) contain the most differences in this build (R62B, R62C, R72A, R72C).
Palmtree Panic Zone Act 2 (R12A/B/C/D__.MMD)
A critter that jumps around in good future is removed in the final:
054E 028E A401 E000
A spring and a rock that stop you were added in the final. The goal post is also moved to the right in the final.
26C8 02D2 9600 E000 (goal post)
is replaced by
2628 42D8 0A0A 2000 (spring - past) 2630 42D0 0A0A C000 (spring - present, future) 2730 02C4 9600 C000 (goal post - present, future) 2738 02CB 9600 2000 (goal post - past) 27A0 02E0 1B00 E000 (rock)
Metallic Madness Zone Act 2 (R82B__.MMD, R82C__.MMD)
The prototype has two places where Mini Sonic can fall through the wall in Metallic Madness Act 2. The final adds the following two objects which act as barriers to fix this bug:
0910 0710 0900 2000 1A20 0110 0900 E000
The block causing the first bug was also reinforced with collision on the top and bottom so that even if you fall into it, you won't fall through the bottom any more. The column causing the second bug was also reinforced making it entirely solid. In the prototype, it has collision holes in the top corners and it's hollow inside.
Quartz Quadrant Zone Act 3 (R53C__.MMD, R53D__.MMD)
The boss in both good and bad future has a different color
The background in Bad Future starts higher than in the final.
Visual mode (VM____.MMD)
In builds 712 and 801, there are 5 patterns that are loaded into the same place in Video RAM in succession (overwriting each other). The last pattern (#5) is changed between 712 and 801, fixing the OPENNING typo. Patterns #1-#4, which presumably show the development progression of the Visual Mode are removed in the final, leaving only pattern #5.
|1||Sonic the Hedgehog CD (Aug 1, 1993 prototype).ccd||Track list||7.6 KB||e9da0992bd2bad2e4c8739d2a83a6cedf4b22d2c|
|2||Sonic the Hedgehog CD (Aug 1, 1993 prototype).cue||Track list||2.3 KB||11bd0bb10179a032b35f1290552992625254ebaa|
|3||Sonic the Hedgehog CD (Aug 1, 1993 prototype).img||Disc data||556.41 MB||a284870b1cfe8c43c48969a6b229f807b79028e2|
|4||Sonic the Hedgehog CD (Aug 1, 1993 prototype).sub||Subchannel data||22.71 MB||7a35aab38fa2a2f0f9fcd6acfd9c7a78ad46ac9e|
00000100 00000110 00000120 00000130 00000140 00000150 00000160 00000170 00000180 00000190 000001a0 000001b0 000001c0 000001d0 000001e0 000001f0