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redhotsonic's Photo
Group:
Tech Member: Tech Members
Active Posts:
969 (0.32 per day)
Most Active In:
Engineering & Reverse Engineering (515 posts)
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31-January 05
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User is offline Today, 10:38 AM
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My Information

Member Title:
Also known as RHS
Age:
24 years old
Birthday:
January 25, 1989
Gender:
Male Male
Location:
United Kingdom

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Click here to e-mail me
MSN:
MSN  [email protected]
Website:
Website  http://www.youtube.com/user/redhotsonic

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Other Contact Info:
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Project:
Sonic 2 Recreation
National Flag:
gb
Wiki edits:
24

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Posts I've Made

  1. In Topic: How to fix speed issues in Sonic 2

    Yesterday, 07:12 PM

    View PostMoDule, on Yesterday, 06:57 PM, said:

    Next, you can get away with a smaller data table without the blank words. Just multiply d0 with 6 instead of 8. Adding to that, I think you can save a few cycles by multiplying the bit-values themselves with 6, instead of doing it at the end. You'll need to change the second and third addq.w to addi.w, but the cycles those two changes add (4 each) are mitigated by not having to do three add.w's at the end (12 cycles, saving 4 cycles total). Admittedly, not much, and this isn't exactly a routine where optimization is very important, but you'll at least save some ROM space while you're at it.


    Thanks for the tip, but it's not much point changing it. My maths isn't too great and that's why I came up with the longword routine. But you can change it this way by all means in your hack :)


    View PostMoDule, on Yesterday, 06:57 PM, said:

    Finally, I think you're going to have to make the routine character-specific, or else Tails is going to use the wrong values when Sonic turns super.



    ...shit. Didn't think of that. Never crossed my mind. Anyway, simple fix. Under the label "ApplySpeedSettings:", just before "tst.b (Super_Sonic_flag).w", add this:

    	cmpa.w	#MainCharacter,a0		; Is it Tails currently following this code?
	bne.s	+				; If so, branch and ignore next question



    So you end up with this:

    ApplySpeedSettings:
	moveq	#0,d0				; Quickly clear d0
	tst.w	speedshoes_time(a0)		; Does character have speedshoes?
	beq.s	+				; If not, branch
	addq.b	#1,d0				; Quickly add 1 to d0
+
	btst	#6,status(a0)			; Is the character underwater?
	beq.s	+				; If not, branch
	addq.b	#2,d0				; Quickly add 2 to d0
+
	cmpa.w	#MainCharacter,a0		; Is it Tails currently following this code?
	bne.s	+				; If so, branch and ignore next question
	tst.b	(Super_Sonic_flag).w		; Is the character Super?
	beq.s	+				; If not, branch
	addq.b	#4,d0				; Quickly add 4 to d0
+
	add.b	d0,d0				; Multiply itself
	add.b	d0,d0				; And again
	add.b	d0,d0				; And again
	lea	Speedsettings(pc,d0.w),a1	; Load correct speed settings into a1
	addq.l	#2,a1				; Increment a1 by 2 quickly
	move.l	(a1)+,(a2)+			; Set character's new top speed and acceleration
	move.w	(a1),(a2)			; Set character's deceleration
	rts					; Finish subroutine



    Fixed in first post. Thanks for pointing that bug out.

  2. In Topic: General Project Screenshot/Video Thread

    15 May 2013 - 05:34 PM

    Wouldn't it of made more sense posting this in the topic where you were talking about it? =P

  3. In Topic: Basic Questions & Answers thread

    15 May 2013 - 05:31 PM

    Ah I see, that's probably why he moves by some certain pixels due to the slope. If I get time this weekend, I'll have a look into it (and try to pull the bug off myself =P)

  4. In Topic: Basic Questions & Answers thread

    15 May 2013 - 02:02 PM

    Sorry if I am misunderstanding here, but if in the normal Sonic 2, it doesn't use it's "normal" form, why not just use it as they're are in all other Sonic 2 levels?


    And what do you mean by "normal" form?

  5. In Topic: Basic Questions & Answers thread

    14 May 2013 - 05:04 PM

    3) I can't see this bug. Where abouts did you notice this?