Basic Questions & Answers thread

When I go to build my hack, I get this error: Error : Label 'sfx_continue' multiply defined
sfx_continue: how can I fix this error?

 

This means you have two sfx_continue labels. Find the string

Code (Text):

1. sfx_continue:

What are the appropriate lines?

 

OK, I took some sprites, they didn't need scaling or resizing, and I recolored them to Sonic's Palate
I put them into SonMapEd, edit'd the mappings, and imported the sprites. I saved the Mappings, Uncompressed Tile GFX, and Dynamic Pattern Loading Cues (or whatever). I only changed the first two frames. standing and one bored look.

I tried to use build.bat (I am using the Sonic 1 SVN Dissasembly) and it didn't build. I got the following errors in the errors.txt:

Code (Text):

1. SN 68k version 2.53
2.  
3. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\81 CONTINUE SCREEN SONIC.ASM(22) : Error : Symbol 'map_sonic' not defined
4. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\81 CONTINUE SCREEN SONIC.ASM(54) : Error : Symbol 'map_sonic' not defined
5. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\59 SLZ ELEVATORS.ASM(10) : Warning : Forward reference to redefinable symbol
6. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\5A SLZ CIRCLING PLATFORM.ASM(10) : Warning : Forward reference to redefinable symbol
7. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\5B STAIRCASE.ASM(10) : Warning : Forward reference to redefinable symbol
8. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\5E SEESAW.ASM(10) : Warning : Forward reference to redefinable symbol
9. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\SONIC.ASM(6797) : Error : Symbol 'map_sonic' not defined
10. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(38) : Error : Symbol 'fr_walk13' not defined
11. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(38) : Error : Symbol 'fr_walk14' not defined
12. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(38) : Error : Symbol 'fr_walk15' not defined
13. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(38) : Error : Symbol 'fr_walk16' not defined
14. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(38) : Error : Symbol 'fr_walk11' not defined
15. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(38) : Error : Symbol 'fr_walk12' not defined
16. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(40) : Error : Symbol 'fr_run11' not defined
17. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(40) : Error : Symbol 'fr_run12' not defined
18. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(40) : Error : Symbol 'fr_run13' not defined
19. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(40) : Error : Symbol 'fr_run14' not defined
20. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(42) : Error : Symbol 'fr_roll1' not defined
21. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(42) : Error : Symbol 'fr_roll2' not defined
22. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(42) : Error : Symbol 'fr_roll3' not defined
23. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(42) : Error : Symbol 'fr_roll4' not defined
24. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(42) : Error : Symbol 'fr_roll5' not defined
25. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(44) : Error : Symbol 'fr_roll1' not defined
26. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(44) : Error : Symbol 'fr_roll2' not defined
27. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(44) : Error : Symbol 'fr_roll5' not defined
28. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(44) : Error : Symbol 'fr_roll3' not defined
29. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(44) : Error : Symbol 'fr_roll4' not defined
30. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(44) : Error : Symbol 'fr_roll5' not defined
31. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(46) : Error : Symbol 'fr_push1' not defined
32. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(46) : Error : Symbol 'fr_push2' not defined
33. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(46) : Error : Symbol 'fr_push3' not defined
34. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(46) : Error : Symbol 'fr_push4' not defined
35. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
36. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
37. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
38. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
39. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
40. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
41. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
42. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
43. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(48) : Error : Symbol 'fr_stand' not defined
44. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_stand' not defined
45. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_stand' not defined
46. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_stand' not defined
47. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_wait2' not defined
48. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_wait1' not defined
49. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_wait1' not defined
50. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_wait1' not defined
51. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_wait2' not defined
52. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(49) : Error : Symbol 'fr_wait3' not defined
53. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(51) : Error : Symbol 'fr_balance1' not defined
54. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(51) : Error : Symbol 'fr_balance2' not defined
55. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(53) : Error : Symbol 'fr_lookup' not defined
56. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(55) : Error : Symbol 'fr_duck' not defined
57. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(57) : Error : Symbol 'fr_warp1' not defined
58. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(59) : Error : Symbol 'fr_warp2' not defined
59. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(61) : Error : Symbol 'fr_warp3' not defined
60. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(63) : Error : Symbol 'fr_warp4' not defined
61. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(65) : Error : Symbol 'fr_stop1' not defined
62. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(65) : Error : Symbol 'fr_stop2' not defined
63. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(67) : Error : Symbol 'fr_float1' not defined
64. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(67) : Error : Symbol 'fr_float4' not defined
65. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(69) : Error : Symbol 'fr_float1' not defined
66. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(69) : Error : Symbol 'fr_float2' not defined
67. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(69) : Error : Symbol 'fr_float5' not defined
68. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(69) : Error : Symbol 'fr_float3' not defined
69. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(69) : Error : Symbol 'fr_float6' not defined
70. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(71) : Error : Symbol 'fr_spring' not defined
71. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(73) : Error : Symbol 'fr_hang1' not defined
72. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(73) : Error : Symbol 'fr_hang2' not defined
73. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(75) : Error : Symbol 'fr_leap1' not defined
74. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(75) : Error : Symbol 'fr_leap1' not defined
75. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(75) : Error : Symbol 'fr_leap1' not defined
76. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(77) : Error : Symbol 'fr_leap1' not defined
77. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(77) : Error : Symbol 'fr_leap2' not defined
78. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(79) : Error : Symbol 'fr_surf' not defined
79. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(81) : Error : Symbol 'fr_getair' not defined
80. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(81) : Error : Symbol 'fr_getair' not defined
81. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(81) : Error : Symbol 'fr_walk15' not defined
82. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(81) : Error : Symbol 'fr_walk16' not defined
83. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(83) : Error : Symbol 'fr_burnt' not defined
84. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(85) : Error : Symbol 'fr_drown' not defined
85. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(87) : Error : Symbol 'fr_death' not defined
86. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(89) : Error : Symbol 'fr_shrink1' not defined
87. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(89) : Error : Symbol 'fr_shrink2' not defined
88. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(89) : Error : Symbol 'fr_shrink3' not defined
89. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(89) : Error : Symbol 'fr_shrink4' not defined
90. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(89) : Error : Symbol 'fr_shrink5' not defined
91. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(89) : Error : Symbol 'fr_null' not defined
92. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(91) : Error : Symbol 'fr_injury' not defined
93. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(94) : Error : Symbol 'fr_injury' not defined
94. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(94) : Error : Symbol 'fr_waterslide' not defined
95. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(96) : Error : Symbol 'fr_null' not defined
96. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(98) : Error : Symbol 'fr_float1' not defined
97. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(98) : Error : Symbol 'fr_float2' not defined
98. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(98) : Error : Symbol 'fr_float5' not defined
99. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(98) : Error : Symbol 'fr_float3' not defined
100. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(98) : Error : Symbol 'fr_float6' not defined
101. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_ANIM\SONIC.ASM(100) : Error : Symbol 'fr_float1' not defined
102. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\SONIC LOADGFX.ASM(15) : Error : Symbol 'sonicdynplc' not defined
103. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ9 SONIC IN SPECIAL STAGE.ASM(28) : Error : Symbol 'map_sonic' not defined
104. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\DEBUGMODE.ASM(183) : Error : Symbol 'map_sonic' not defined
105. C:\USERS\EVERYBODY\DESKTOP\PROJECTS\SONIC 1 DISASSEMBLY\_INCOBJ\DEBUGMODE.ASM(195) : Error : Symbol 'map_sonic' not defined
106.  
107. Assembly completed.
108. 99 error(s) from 51054 lines in 3.6 seconds

And no, it didn't assemble.



plshelpkthx

 

My psychic powers tell me you saved your mappings in ASM format.

The act of saving loses all the label naming which is present in the original mappings, so when anything tries to reference those labels it can't find them because the new names are essentially randomly generated by SonMapEd.

You need to go through and repair all the labels in the ASM file you saved to the original labels.

 

Not really a problem, but a random question: I added far over 40 new flags (most of them are being used just once in a whole game play, but I'm too lazy to crop that down). To clear all those flag, I made a subroutine called ClearEverySpecialFlag. But that's not too important. However, the structure of that routine is this:

Code (ASM):

1. ; ---------------------------------------------------------------------------
2. ; Subroutine to clear every special flag (e.g. cutscenes, custom bosses)
3. ; ---------------------------------------------------------------------------
4.  
5. ClearEverySpecialFlag:
6.         clr.b   ($FFFFFFA0).w
7.         clr.b   ($FFFFFFA1).w
8.         clr.b   ($FFFFFFA2).w
9.         clr.b   ($FFFFFFA3).w
10.         clr.b   ($FFFFFFA4).w
11.         ...

Imagine there are 42 of those clr.b lines. Now I was wondering, are there any quicker and more professional ways to do this?

 

Assuming all of these flags are contiguous,

Code (ASM):

1. ClearEverySpecialFlag:
2.     lea ($FFFFFFA0).w,a0
3.     move.l  #41,d0
4. clearloop:
5.     clr.b   (a0)+
6.     dbf d0,clearloop
7.     rts

Remember, for dbf, the index must always be count-1.

 

You could also create a special macro to clear those flags:

Code (ASM):

1.  
2. clearflags macro
3.            lea  ($FFFFFFA0).w,a0
4.            move.l #41,d0
5. clearloop: 
6.            clr.b (a0)+
7.            dbf  d0,clearloop
8.            endm
9.  

Not that if not all of these flags are between $FFA0 till $FFE1 then you will have to clear most of those ram adresses manualy.

 

1. if they're flags, you don't need A WHOLE BYTE for each of them. Learn how to use bitfields, and you'll store 8 flags in the same byte;
2. I *think* that moveq is faster, though I wouldn't bet money over this;
3. 42 identical lines might be ugly, but they're actually faster than a dbf. This is called "loop unrolling".

edit: you can also clear 4 bytes at the same time by using move.l #$0,(address).w if you don't want to use moveq.

 

ClearEverySpecialFlag:
lea ($FFFFFFA0).w,a0
move.l #4,d0
clearloop:
clr.l (a0)+
dbf d0,clearloop
clr.b (a0)
rts

wouldn't this work a bit faster?

 

Probably, but it won't be clean if he doesn't have an even # of flags divisible by 4.

 

I repeat. The fastest way is to avoid the dbf and unroll the loop.

So:
move.l #$0, ($FFFFFFA0).w
move.l #$0, ($FFFFFFA4).w
move.l #$0, ($FFFFFFA8).w
move.l #$0, ($FFFFFFAC).w
move.l #$0, ($FFFFFFB0).w
move.l #$0, ($FFFFFFB4).w
move.l #$0, ($FFFFFFB8).w
move.l #$0, ($FFFFFFBC).w
move.l #$0, ($FFFFFFC0).w
move.l #$0, ($FFFFFFC4).w
move.w #$0, ($FFFFFFC8).w

/question

And I still believe he should group these flags in bitfields where applicable, it's unrealistic to use 42 bytes of memory to store your flags :x

 

Ok, I guess nineko won here. This way is claimed to be the fastest one, so I'll take it.

And probably no, I will not change the other flags into bits (not because I'm not able to do it, but because I'm a lazy fuck). But I'll use bits in the future then. =P

 

How do I find the line where the game checks if you've touched the button on the Egg Prison in Sonic 2? (2007 disasm)

 

You can either set up a flag with a blank RAM value:

move.b #1(RAM VALUE).w


And put it in say, the egg prison object, or even the results object (Obj3A


then test for it,

tst.b (RAM VALUE).w

 

That doesn't help, I need the line where the check is performed because I need to run some code immediately when the button is pressed (I've already added this code to the signpost).

 

That should be:

Code (ASM):

1. loc_3F2B4:
2.     movea.w objoff_38(a0),a1 ; a1=object
3.     tst.w   objoff_32(a1)
4.     beq.s   return_3F2FA
5.  ; --> Put your stuff in here
6.     movea.w objoff_3A(a0),a2 ; a2=object
7.     jsr (SingleObjLoad).l
8.     bne.s   loc_3F2E0
9.     ...

I tested it with an rts and nothing happened when I jumped on the button. So that should work.

 

Nine times out of ten it doesn't matter how many cycles you use AFAIK.

 

Thanks Selbi, that worked!

 

That, and unrolled loops get increasingly difficult to maintain as the number of iterations increases.

 

Anothe question: Some time ago I asked how to check if an object is on-screen, using tst.b 1(a0). That worked perfectly. But now I will need another on-screen check, where, however, it doesn't matter if the Y-position isn't on the screen. So I just want to check if the X-position is on-screen.