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This is an archived, read-only copy of the United-TI subforum , including posts and topic from May 2003 to April 2012. If you would like to discuss any of the topics in this forum, you can visit Cemetech's z80 Assembly subforum. Some of these topics may also be directly-linked to active Cemetech topics. If you are a Cemetech member with a linked United-TI account, you can link United-TI topics here with your current Cemetech topics.
 Z80 & 68k Assembly => z80 Assembly
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Jerros
Newbie
Joined: 03 Jul 2010
Posts: 8
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 Posted: 06 Jul 2010 03:02:56 am Post subject: |
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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
Last edited by Guest on 06 Jul 2010 10:30:21 am; edited 1 time in total |
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calc84maniac
Elite
Joined: 22 Jan 2007
Posts: 770
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| Posted: 06 Jul 2010 08:57:47 am Post subject: |
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| Jerros wrote: |
Code:
Sprite:
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
01000000
00100000
00010000
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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 >_>
Last edited by Guest on 06 Jul 2010 08:59:18 am; edited 1 time in total |
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Jerros
Newbie
Joined: 03 Jul 2010
Posts: 8
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| Posted: 06 Jul 2010 10:18:58 am Post subject: |
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| 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"?
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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!
Last edited by Guest on 06 Jul 2010 10:31:52 am; edited 1 time in total |
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DigiTan
Unregistered HyperCam 2
Super Elite (Last Title)
Joined: 10 Nov 2003
Posts: 4468
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| Posted: 06 Jul 2010 09:30:42 pm Post subject: |
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| 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. |
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calc84maniac
Elite
Joined: 22 Jan 2007
Posts: 770
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| Posted: 06 Jul 2010 09:37:06 pm Post subject: |
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| 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!
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clip_mask should be in RAM, yes. Otherwise the routine will try to modify flash and fail. |
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Jerros
Newbie
Joined: 03 Jul 2010
Posts: 8
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| Posted: 07 Jul 2010 01:32:30 am Post subject: |
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| 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.
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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.
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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. |
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calc84maniac
Elite
Joined: 22 Jan 2007
Posts: 770
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| Posted: 08 Jul 2010 12:29:40 pm Post subject: |
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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) |
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Jerros
Newbie
Joined: 03 Jul 2010
Posts: 8
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| Posted: 09 Jul 2010 02:10:20 am Post subject: |
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| 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)
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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 : )
Last edited by Guest on 11 Jul 2010 08:05:56 am; edited 1 time in total |
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