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06 Jul 2010 03:02:56 am by Jerros
I've recently converted my programm into an APP, but the sprites won't display correctly. I know you can't use any self-modifieing code in an APP, but I don't know where the problem lies. So what's the piece thats failing because it's an APP? And more importantly, how do I fix it? I'm a real newby in programming, so don't be afraid to overexplain things. The script I use is ripped directly from the asm-in-28 tutorial: Code:     LD      A, 28                  ; X position of sprite     LD      (xpos), A     LD      A, 38                  ; Y position of sprite     LD      (ypos), A     LD      B, 11                  ; Length in Y direction of the sprite     LD      DE, (ypos)     LD      IX, Sprite     CALL   ShowSprite Sprite:    .db 00000001    .db 00000010    .db 00000100    .db 00001000    .db 00010000    .db 00100000    .db 01000000    .db 10000000    .db 01000000    .db 00100000    .db 00010000 Showsprite:                  ; Show Sprite (XOR)         CALL    ClipSprXOR         b_call _GrBufCpy    ret ClipSprXOR:                  ; Show Sprite XOR     LD     A, %11111111     LD     (clip_mask), A     LD     A, E     OR     A     JP     M, ClipTop     SUB    64     RET    NC     NEG     CP     B     JR     NC, VertClipDone     LD     B, A     JR     VertClipDone ClipTop:     LD     A, B     NEG     SUB    E     RET    NC     PUSH   AF     ADD    A, B     LD     E, 0     LD     B, E     LD     C, A     ADD    IX, BC     POP    AF     NEG     LD     B, A VertClipDone:     LD     C, 0     LD     A, D     CP     -7     JR     NC, ClipLeft     CP     96     RET    NC     CP     89     JR     C, HorizClipDone ClipRight:     AND    7     LD     C, A     LD     A, %11111111 FindRightMask:     ADD    A, A     DEC    C     JR     NZ, FindRightMask     LD     (clip_mask), A     LD     A, D     JR     HorizClipDone ClipLeft:     AND    7     LD     C, A     LD     A, %11111111 FindLeftMask:     ADD    A, A     DEC    C     JR     NZ, FindLeftMask     CPL     LD     (clip_mask), A     LD     A, D     ADD    A, 96     LD     C, 12 HorizClipDone:     LD     H, 0     LD     D, H     LD     L, E     ADD    HL, HL     ADD    HL, DE     ADD    HL, HL     ADD    HL, HL     LD     E, A     SRL    E     SRL    E     SRL    E     ADD    HL, DE     LD     DE, PlotSScreen     ADD    HL, DE     LD     D, 0     LD     E, C     SBC    HL, DE     AND    7     JR     Z, _Aligned     LD     C, A     LD     DE, 11 _RowLoop:     PUSH   BC     LD     B, C     LD     A, (clip_mask)     AND    (IX)     LD     C, 0 _ShiftLoop:     SRL    A     RR     C     DJNZ   _ShiftLoop     XOR    (HL)     LD     (HL), A     INC    HL     LD     A, C     XOR    (HL)     LD     (HL), A     ADD    HL, DE     INC    IX     POP    BC     DJNZ   _RowLoop     RET _Aligned:     LD     DE, 12 _PutLoop:     LD     A, (IX)     XOR    (HL)     LD     (HL), A     INC    IX     ADD    HL, DE     DJNZ   _PutLoop     RET clip_mask:      .DB     0

06 Jul 2010 08:57:47 am by calc84maniac
Jerros wrote: Code: Sprite:     00000001     00000010     00000100     00001000     00010000     00100000     01000000     10000000     01000000     00100000     00010000 That's not a valid way to put data. I'm surprised your assembler isn't giving an error. It should be: Code: Sprite:     .db 000001     .db 000010     .db 000100     .db 001000     .db 010000     .db 100000     .db %01000000     .db %10000000     .db %01000000     .db 100000     .db 010000 Assuming that's not the problem, where is the location of "clip_mask"? Edit: Meh, the forum ate my "% 00". Just pretend they are still there >_>

06 Jul 2010 10:18:58 am by Jerros
calc84maniac wrote: [That's not a valid way to put data. I'm surprised your assembler isn't giving an error. It should be: [ Assuming that's not the problem, where is the location of "clip_mask"? Thats idd not the problem 0x5, I wasnt paying much attention there, in my real program its like its supposed to be. I also forgot to put clip_mask there, its just in the APP, below the piece of script I posted. Shoult it be copyd to the ram or something? Thanks for your reply!

06 Jul 2010 09:30:42 pm by DigiTan
I don't know if this applies to every APP builder, but I have to include validate() as the last line of code. Also, I'll need to do a bjump(JForceCmdNoChar) to safely exit to TI-OS. Since there's no exit after the CALL ShowSprite part, the system will try to execute the sprite data and do something mean.

06 Jul 2010 09:37:06 pm by calc84maniac
Jerros wrote: calc84maniac wrote: [That's not a valid way to put data. I'm surprised your assembler isn't giving an error. It should be: [ Assuming that's not the problem, where is the location of "clip_mask"? Thats idd not the problem 0x5, I wasnt paying much attention there, in my real program its like its supposed to be. I also forgot to put clip_mask there, its just in the APP, below the piece of script I posted. Shoult it be copyd to the ram or something? Thanks for your reply! clip_mask should be in RAM, yes. Otherwise the routine will try to modify flash and fail.

07 Jul 2010 01:32:30 am by Jerros
DigiTan wrote: I don't know if this applies to every APP builder, but I have to include validate() as the last line of code. Also, I'll need to do a bjump(JForceCmdNoChar) to safely exit to TI-OS. Since there's no exit after the CALL ShowSprite part, the system will try to execute the sprite data and do something mean. Thanks for the reply, but what I've posted is of course just a small piece of the programm, not the whole thing. I'ts not nessecary to post the whole header + a complete working programm. calc84maniac wrote: [clip_mask should be in RAM, yes. Otherwise the routine will try to modify flash and fail. That will be the problem then, but when do I move and read it from the ram? I mean, where in the script do I copy it to the ram, and how/where do I "read" it? Like I said, don't underestimate my newbyness here Thanks for the help.

08 Jul 2010 12:29:40 pm by calc84maniac
You need to define all of your variables in RAM somewhere, like this: Code: xpos .equ appbackupscreen ypos .equ xpos+1 clip_mask .equ ypos+1 There is no actual copying going on, you simply have the variables in a different location (in the safe-to-use area of appbackupscreen)

09 Jul 2010 02:10:20 am by Jerros
calc84maniac wrote: You need to define all of your variables in RAM somewhere, like this: Code: xpos .equ appbackupscreen ypos .equ xpos+1 clip_mask .equ ypos+1 There is no actual copying going on, you simply have the variables in a different location (in the safe-to-use area of appbackupscreen) Omg, I finally get how things work, thank you! Just to be sure, each "+1" is a value of hF or hFF? (yes, I am THAT big of a newb) That way I know how wether to do +1 or +2 or +whatever. Or is the beautiful thing here that you dont need to bother with that, since you're using the previous variable +1? EDIT: At elast the sprites now show, though the locations are off. This might be because I use this to keep track of the sprite locations: Code: xspr1:   .db   0 yspr1:   .db   64 xspr2:   .db   0 yspr2:   .db   64 xspr3:   .db   0 yspr3:   .db   64 xspr4:   .db   0 yspr4:   .db   64 xspr5:   .db   0 yspr5:   .db   64 xspr6:   .db   0 yspr6:   .db   64 xspr7:   .db   0 yspr7:   .db   64 xspr8:   .db   0 yspr8:   .db   64 xspr9:   .db   0 yspr9:   .db   64 xspr10:   .db   0 yspr10:   .db   64 xspr11:   .db   0 yspr11:   .db   64 xspr12:   .db   0 yspr12:   .db   64 xspr13:   .db   0 yspr13:   .db   64 xspr14:   .db   0 yspr14:   .db   64 xspr15:   .db   0 yspr15:   .db   64 xspr16:   .db   0 yspr16:   .db   64 Now, with your advie I defined it like: Code: xpos   .equ   appBackupScreen ypos   .equ   xpos+2 clip_mask   .equ   ypos+2 xspr1   .equ   clip_mask+2 yspr1   .equ   xspr1+2 xspr2   .equ   yspr1+2 yspr2   .equ   xspr2+2 xspr3   .equ   yspr2+2 yspr3   .equ   xspr3+2 xspr4   .equ   yspr3+2 yspr4   .equ   xspr4+2 xspr5   .equ   yspr4+2 yspr5   .equ   xspr5+2 xspr6   .equ   yspr5+2 yspr6   .equ   xspr6+2 xspr7   .equ   yspr6+2 yspr7   .equ   xspr7+2 xspr8   .equ   yspr7+2 yspr8   .equ   xspr8+2 xspr9   .equ   yspr8+2 yspr9   .equ   xspr9+2 xspr10   .equ   yspr9+2 yspr10   .equ   xspr10+2 xspr11   .equ   yspr10+2 yspr11   .equ   xspr11+2 xspr12   .equ   yspr11+2 yspr12   .equ   xspr12+2 xspr13   .equ   yspr12+2 yspr13   .equ   xspr13+2 xspr14   .equ   yspr13+2 yspr14   .equ   xspr14+2 xspr15   .equ   yspr14+2 yspr15   .equ   xspr15+2 xspr16   .equ   yspr15+2 yspr16   .equ   xspr16+2 Maybe +2 isnt enough? Or am I angering the asm gods with this? Anyway, thanks alot, I think this will help me much further, since my game is nearly completed : )

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