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Tyraniek


Member


Joined: 07 Jun 2003
Posts: 133

Posted: 08 Jul 2003 10:00:33 am    Post subject:

How could I use these pictures, as private pictures, for exemple :

picture:
.db 255, 0, 124, 255 etc. (96*64)

Can I simply replace
ld hl, picture

bu ld hl, pic1 where pic1 is
.db PictObj, tVarPict, tStr1, 0
?

So how could I use them by the same way that private pictures. I mean :

Code:
   B_CALL(_grbufclr)
   ld   hl, pub
   ld   de, plotsscreen
   ld   bc, 768     ; Définit le nombre d'octets à copier   (96*64)/8
   ldir    ; copie les octets
   B_CALL(_grbufcpy)


Thank you
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Job the GameQuitter


Member


Joined: 04 Jun 2003
Posts: 102

Posted: 08 Jul 2003 09:14:40 pm    Post subject:

No, what you need to do is search the Symbol Table (also known as the VAT) for a Pic 1 entry, then load the starting adress of the picture, LDIR.

Look up FindSym in the system routine document of TI and the Symbol Table entry of the SDK.
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Adm.Wiggin
aka Tianon


Know-It-All


Joined: 02 Jun 2003
Posts: 1874

Posted: 08 Jul 2003 10:32:18 pm    Post subject:

isnt findsym also the same as rst 10h or something?
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Job the GameQuitter


Member


Joined: 04 Jun 2003
Posts: 102

Posted: 09 Jul 2003 06:00:45 am    Post subject:

Whoop! Forgot to add that. Yeah, use RST 10h (make sure it's 10h and not $10) instead of bcall(findsym). It's functionally identical but it's faster and it saves a byte!
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Tyraniek


Member


Joined: 07 Jun 2003
Posts: 133

Posted: 09 Jul 2003 12:23:51 pm    Post subject:

Quote:
No, what you need to do is search the Symbol Table (also known as the VAT) for a Pic 1 entry, then load the starting adress of the picture, LDIR.


That was compact !!! What do you mean ?
What I should find in the symbol Table isn't .db PictObj, tVarPict, tStr1, 0 ??? And then, how do I have to use LDIR ? You mean, I just have to LDIR if I want to display it at the screen (with plotsscreen) ? If so, OK, I know how to do.

So, could you just explain me a little bit more what I have to do with checkfindsym (or RST 10h) ?
And I don't have the documentation you're talking about any more :-/


I hope, you'll help me !
Thank you Smile
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Job the GameQuitter


Member


Joined: 04 Jun 2003
Posts: 102

Posted: 09 Jul 2003 12:43:31 pm    Post subject:

You don't? Then get it man, you obviously have accest to the internet! Laughing There's a pinned thread, Good ASM tutorials. It has links to said documents.

Anyway, I'll copy the FindSym entry for you:

Code:
Inputs:
Registers:
(OP1 + 1) to (OP1 + 6) = variable name
See documentation on variable naming conventions.
Flags:
None
Others:
None

Outputs:
Registers:
CA flag = 1 if symbol was not found
= 0 if symbol was found
If symbol is found, additional outputs are:
ACC lower 5 bits = data type
ACC upper 3 bits = system flags about variable. Mask via “AND” with a
value of 1Fh to obtain data type only.
B = 0 if variable is located in RAM else variable is archived
B = ROM page located on
If variable is archived then its data cannot be accessed directly, it
must be unarchived first.
HL = pointer to the start of the variables symbol table entry
DE = pointer to the start of the variables data area if in RAM


So you would do

Code:
 ld hl, pic1

pic1:
.db PictObj, tVarPict, tStr1, 0
like you said, but you should add:
Code:
 ld hl, pic1
 rst 20h; This is the equivalent of Mov9op1
 rst 10h; look it up
 LD H,D
 LD L,E
 LD BC,768
 LD DE,gbuf
 LDIR
 B_CALL(_grbufcpy)
pic1:
 .db PictObj, tVarPict, tStr1, 0
I hope what I say is understandable.

PS: You don't need to clear the gbuf, because you're loading a new picture into it anyway.
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Tyraniek


Member


Joined: 07 Jun 2003
Posts: 133

Posted: 09 Jul 2003 01:47:16 pm    Post subject:

What you said is perfectly understandable.
Allright, that's what I wrote by reading the "Asm lessons in 28 days". (its author does quite the same thing, but with a list).


Code:
   ld   hl, pic1
   rst   20h
   rst   10h
   ex   de, hl
   ld   de, plotsscreen
   ld   bc, 768
   ldir
   B_CALL(_grbufcpy)


Then, I replaced "EX DE, HL" by your code, and it didn't work all the same :-/
Maybe it is because I wrote plotsscreen, but I didn't find any "gbuf" in the asm83p.inc file.
I add that when I say "it doesn't work", that means the picture is just not at the right place and is a little bit too much on the right.
I also wrote "Pic1" instead of "Str1", but anyways, both instructions are equal to "00h".
So what could be the cause of the problem ?

I add that I've created a pic and stored it as "pic1".
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Job the GameQuitter


Member


Joined: 04 Jun 2003
Posts: 102

Posted: 09 Jul 2003 03:46:48 pm    Post subject:

gbuf=Ion equate for plotsscreen Laughing. And you should use EX HL,DE. I forgot about that instruction (stupid, stupid me!). As for you problem... maybe the first byte of a Pic object is a token, just like ASM programs start with a tAsmPrgm.

Try inserting an INC HL before using LDIR. Does it display the picture properly now? I'm just guessing here.
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Tyraniek


Member


Joined: 07 Jun 2003
Posts: 133

Posted: 09 Jul 2003 04:18:19 pm    Post subject:

Hey !

I wrote "inc hl" 2 times and now, the picture is well centered ! Thank you Job !

However, I don't think your instruction is right : EX HL, DE. We can only write EX DE, HL, but neverwind Very Happy (I'm trying to seem a good programer Razz )

Now, I may continue my program, but I'm first sleeping (my english teacher told me I could say that instead of "I will first sleep", but I don't think she was right ;-)

I thank you all, guys ! Smile
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Adm.Wiggin
aka Tianon


Know-It-All


Joined: 02 Jun 2003
Posts: 1874

Posted: 09 Jul 2003 04:35:25 pm    Post subject:

yes, u must go past the 2 size bytes (wasted space, since they are always the same!)
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Job the GameQuitter


Member


Joined: 04 Jun 2003
Posts: 102

Posted: 09 Jul 2003 08:01:58 pm    Post subject:

It's a bit weird, isn't it? The only thing that matters is the adress in the SymTable anyway, why the heck use tokens like that? I mean, I understand why to put a token in front of an ASM program, but other than that.
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