Author Topic: Free RAM and drawing stuff  (Read 5080 times)

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Offline macweirdo

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Free RAM and drawing stuff
« on: November 20, 2011, 04:39:34 pm »
So let's say I wanted to have a way to store two bits per pixel on the screen (768 bytes of data, * 2.) into RAM so I could manipulate it. How would I go about doing this, and which safeRam areas should I use (if I use L6, I'll just end up drawing directly to the screen, but I want 4scale as well, and I know it's possible.)

The first one, I'm guessing might be L3, and everytime I want to access data, I'll just do
for bit one:
Code: [Select]
{L3}+(number of pixel)
and bit two:
Code: [Select]
{other safeRam}+(number of pixel)
so to draw the screen, I just have to do a
Code: [Select]
DispGraph(L3,other safeRam)^r
So tl;dr, which safeRam besides L3 should I use for holding the entire screen?
Thanks in advance!

Offline ztrumpet

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Re: Free RAM and drawing stuff
« Reply #1 on: November 20, 2011, 04:58:04 pm »
You could wither use L6, which is the main buffer, or use L1 after Reallocating the variables elsewhere. To reallocate the variables, use something like #Realloc(L4).
Good luck. :)

Offline macweirdo

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Re: Free RAM and drawing stuff
« Reply #2 on: November 20, 2011, 05:01:41 pm »
use L6, which is the main buffer

You're serious? Waht? Doesn't that corrupt buffer drawing or something? (btw, I don't understand that statement)

Good luck. :)

Looks like I'll need it. Thanks :D

Offline ztrumpet

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Re: Free RAM and drawing stuff
« Reply #3 on: November 20, 2011, 05:07:58 pm »
use L6, which is the main buffer

You're serious? Waht? Doesn't that corrupt buffer drawing or something? (btw, I don't understand that statement)
The main buffer is what gets displayed with a DispGraph.  If there's something else there, that will be drawn instead.
For instance, try this code and see if you can figure out what is happening:
Code: [Select]
:ClrDraw
:255->{L6}
:rand->{L6+766}r // This is the superscript r
:DispGraph
:Repeat getKey(15)
:End

Offline macweirdo

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Re: Free RAM and drawing stuff
« Reply #4 on: November 20, 2011, 05:12:20 pm »
use L6, which is the main buffer

You're serious? Waht? Doesn't that corrupt buffer drawing or something? (btw, I don't understand that statement)
The main buffer is what gets displayed with a DispGraph.  If there's something else there, that will be drawn instead.
For instance, try this code and see if you can figure out what is happening:
Code: [Select]
:ClrDraw
:255->{L6}
:rand->{L6+766}r // This is the superscript r
:DispGraph
:Repeat getKey(15)
:End

So storing data there is just like doing a Pxl-On( to that buffer?

Offline AngelFish

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Re: Free RAM and drawing stuff
« Reply #5 on: November 20, 2011, 05:58:59 pm »
Kind of, yes. Pxl-On( places the sprite data in a specific arrangement on the buffer.
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Offline ztrumpet

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Re: Free RAM and drawing stuff
« Reply #6 on: November 20, 2011, 05:59:27 pm »
use L6, which is the main buffer

You're serious? Waht? Doesn't that corrupt buffer drawing or something? (btw, I don't understand that statement)
The main buffer is what gets displayed with a DispGraph.  If there's something else there, that will be drawn instead.
For instance, try this code and see if you can figure out what is happening:
Code: [Select]
:ClrDraw
:255->{L6}
:rand->{L6+766}r // This is the superscript r
:DispGraph
:Repeat getKey(15)
:End

So storing data there is just like doing a Pxl-On( to that buffer?
Kind of.  It's just another way of drawing stuff.
Remember that the data on the buffer is stored in binary, and because of this 255 = FFh = 11111111b makes 8 pixels in a row black.

Offline macweirdo

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Re: Free RAM and drawing stuff
« Reply #7 on: November 20, 2011, 07:48:36 pm »
use L6, which is the main buffer

You're serious? Waht? Doesn't that corrupt buffer drawing or something? (btw, I don't understand that statement)
The main buffer is what gets displayed with a DispGraph.  If there's something else there, that will be drawn instead.
For instance, try this code and see if you can figure out what is happening:
Code: [Select]
:ClrDraw
:255->{L6}
:rand->{L6+766}r // This is the superscript r
:DispGraph
:Repeat getKey(15)
:End

So storing data there is just like doing a Pxl-On( to that buffer?
Kind of.  It's just another way of drawing stuff.
Remember that the data on the buffer is stored in binary, and because of this 255 = FFh = 11111111b makes 8 pixels in a row black.
Yeah, don't worry, I have prior programming experience.

EDIT: why do I have -3 karma?
« Last Edit: November 20, 2011, 07:49:26 pm by macweirdo »

Offline Yeong

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Re: Free RAM and drawing stuff
« Reply #8 on: November 20, 2011, 08:06:09 pm »
track your posts. You'll see which posts got derated.
Sig wipe!

Offline Michael_Lee

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Re: Free RAM and drawing stuff
« Reply #9 on: November 21, 2011, 12:11:30 am »
Just an FYI, if you absolutely needed more free ram and all the buffers are taken, you could create an appvar and use that:

Code: [Select]
getCalc("appvMYAPPV", 766)->A
3->{A+766}
DispGraph(L3,A)^^r

You could also do something like
Code: [Select]
Buff(766,0)->A
3->{A+766}
DispGraph(L3,A)^^r
...although you'd be adding the buffer directly to the program itself (inflating its size by 766 bytes) + I don't think you can modify buffers you have inside the program if you turn your program into an app.
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Offline calc84maniac

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Re: Free RAM and drawing stuff
« Reply #10 on: November 21, 2011, 09:25:34 am »
Two things I must mention. First, buffers are 768 bytes. Second, creating a variable of size 766 in A and storing a value to A+766 will corrupt whatever is next in memory. Why is 3 being stored there, anyway?
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Offline AngelFish

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Re: Free RAM and drawing stuff
« Reply #11 on: November 21, 2011, 10:23:39 am »

EDIT: why do I have -3 karma?


Because three people disliked this post and downvoted it.
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Offline macweirdo

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Re: Free RAM and drawing stuff
« Reply #12 on: November 21, 2011, 07:56:29 pm »

EDIT: why do I have -3 karma?


Because three people disliked this post and downvoted it.

Deleted it because I recently lost respect even though that post is ancient. Thanks for taking the time to find that post :D

EDIT To prevent a double post:

Just an FYI, if you absolutely needed more free ram and all the buffers are taken, you could create an appvar and use that:

Code: [Select]
getCalc("appvMYAPPV", 766)->A
3->{A+766}
DispGraph(L3,A)^^r

You could also do something like
Code: [Select]
Buff(766,0)->A
3->{A+766}
DispGraph(L3,A)^^r
...although you'd be adding the buffer directly to the program itself (inflating its size by 766 bytes) + I don't think you can modify buffers you have inside the program if you turn your program into an app.

I'm trying to keep it as fast as I can, but I'm never making it an App, this program might be less than 1500 bytes.
Can't wait to release my first Axe game :D
« Last Edit: November 21, 2011, 08:00:44 pm by macweirdo »

Offline Michael_Lee

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Re: Free RAM and drawing stuff
« Reply #13 on: November 22, 2011, 01:44:11 am »
Two things I must mention. First, buffers are 768 bytes. Second, creating a variable of size 766 in A and storing a value to A+766 will corrupt whatever is next in memory.
Ah, you're right.  I was just copying down the numbers/examples that were used before.  Whoops.

Why is 3 being stored there, anyway?
No reason.  Prime numbers are cool, I guess.
« Last Edit: November 22, 2011, 01:44:18 am by Michael_Lee »
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Projects:
Axe Interpreter
   > Core: Done
   > Memory: Need write code to add constants.
   > Graphics: Rewritten.  Needs to integrate sprites with constants.
   > IO: GetKey done.  Need to add mostly homescreen IO stuff.
Croquette:
   > Stomping bugs
   > Internet version: On hold until I can make my website less boring/broken.