Sonic 1 - Changing Level Order

My opinion, change lvl_ord.bin to in LevelOrder: to


dc.w $0102
dc.w $0002
dc.w $2000
dc.w $0000
dc.w $0101
dc.w $0102
dc.w $0300
dc.w $0502
dc.w $0201
dc.w $0202
dc.w $0400
dc.w $0000
dc.w $0301
dc.w $0302
dc.w $0500
dc.w $0000
dc.w $0401
dc.w $0402
dc.w $0100
dc.w $0000
dc.w $0501
dc.w $0103
dc.w $0000
dc.w $0000
even

I do mine this way & saves me from opening TranslHEXtion.

I should also state $zzaa = first two bytes are Zone, Last 2 Are act.

 

I get it now, but doesn't change anything.

 

All you need to do is open with hex editor file "misc/lvl_ord.bin". You should see this:

00 01 00 02 02 00 00 00 01 01 01 02 03 00 05 02
02 01 02 02 04 00 00 00 03 01 03 02 05 00 00 00
04 01 04 02 01 00 00 00 05 01 01 03 00 00 00 00Each 2 bytes is one act; first byte is zone number and the second one is act number. Act number are from 00 (act 1) to 03 (act 4) and the zones are as following: 00 - GHZ, 01 - LZ (0103 - SBZ3 in LZ), 02 - MZ, 03 - SLZ, 04 - SYZ and 05 - SBZ. 0000 - back to SEGA screen-So for example

00 01 00 02 02 00 00 00meansGHZ1 -> GHZ2, GHZ2 -> GHZ3, GHZ3 -> MZ1, GHZ4 -> restart

 

Sadly, I still don' t get it.

 

So you can do like in Sonic 2 disassembly. Find

Code:

LevelOrder:	incbin	misclvl_ord.bin
		even

And replace it with

Code:

LevelOrder:	
		dc.w	green_hill_act_2	; GHZ1
		dc.w	green_hill_act_3	; GHZ2
		dc.w	marble_act_1		; GHZ3
		dc.w	lvlord_sega		; GHZ4
		
		dc.w	labyrinth_act_2		; LZ1
		dc.w	labyrinth_act_3		; LZ2
		dc.w	star_light_act_1	; LZ3
		dc.w	final_zone		; LZ4 (SBZ3)
		
		dc.w	marble_act_2		; MZ1
		dc.w	marble_act_3		; MZ2
		dc.w	spring_yard_act_1	; MZ3
		dc.w	lvlord_sega		; MZ4
		
		dc.w	star_light_act_2	; SLZ1
		dc.w	star_light_act_3	; SLZ2
		dc.w	scrap_brain_act_1	; SLZ3
		dc.w	lvlord_sega		; SLZ4
		
		dc.w	spring_yard_act_2	; SYZ1
		dc.w	spring_yard_act_3	; SYZ2
		dc.w	labyrinth_act_1		; SYZ3
		dc.w	lvlord_sega		; SYZ4
		
		dc.w	scrap_brain_act_2	; SBZ1
		dc.w	scrap_brain_act_3	; SBZ2
		dc.w	lvlord_sega		; SBZ3 (FZ)
		dc.w	lvlord_sega		; SBZ4
		even

Then above StartOfRom: add this:

Code:

lvlord_sega		= $0000
green_hill_act_1	= $0000
green_hill_act_2	= $0001
green_hill_act_3	= $0002

marble_act_1	= $0200
marble_act_2	= $0201
marble_act_3	= $0202
		
spring_yard_act_1	= $0400
spring_yard_act_2	= $0401
spring_yard_act_3	= $0402

labyrinth_act_1		= $0100
labyrinth_act_2		= $0101
labyrinth_act_3		= $0102
scrap_brain_act_3	= $0103
		
star_light_act_1	= $0300
star_light_act_2	= $0301
star_light_act_3	= $0302

scrap_brain_act_1	= $0500
scrap_brain_act_2	= $0501
final_zone		= $0502

And save. I don't tested it though, so if don't works - report.

 

Thank you so much!  :biggrin:

P.S: This is great, I have 13 posts left.

 

unless changing where to start the game i think it's somewhere in the LEVEL: code.

 

For the record, if you are using the GitHub Sonic 1 disassembly, you will find this in "3A Got Through Card.ASM"