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Author Topic: Prizm Snake -  (Read 1417 times) Bookmark and Share
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Ashbad
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« on: 01 May, 2011, 20:33:54 »
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Hello, world:

I am going to start my prizm development legacy by making a simple game -- snake!

This will be essentially the original snake with a few added features like beautiful graphics and many modes of play!

Since I haven't even started coding it yet (still getting used to managin prizm projects) I'll just show you my first step, which was to create a SELECTED and UNSELECTED bitmap for each mode -- for your convenience I condensed the two together in a PNG file for you guys to see:
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« Reply #1 on: 01 May, 2011, 20:58:39 »
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This is sure to be awesome!
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« Reply #2 on: 01 May, 2011, 21:29:06 »
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So is this C or asm code. Either way it will be better than the Prizm snake I made in BASIC back in January. The problem with that was that drawing commands were way too slow and difficult to use.

btw you will want to remove the text at the bottom of the menu icons because the OS automatically adds the the name of the app. Or you could just wait for me to finish my asm shell, but that could take anywhere from 2 weeks to 1 month to finish Tongue
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List of stuff I need to do before September:
1. Finish the Emulator of the Casio Prizm (in active development)
2. Finish the the SH3 asm IDE/assembler/linker program (in active development)
3. Create a partial Java virtual machine  for the Prizm (not started)
4. Create Axe for the Prizm with an Axe legacy mode (in planning phase)
5. Develop a large set of C and asm libraries for the Prizm (some progress)
6. Create an emulator of the 83+ for the Prizm (not started)
7. Create a well polished game that showcases the ability of the Casio Prizm (not started)
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« Reply #3 on: 01 May, 2011, 21:40:54 »
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Good luck Ashbad!
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Ashbad
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« Reply #4 on: 01 May, 2011, 21:54:08 »
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Quote from: z80man on 01 May, 2011, 21:29:06
So is this C or asm code. Either way it will be better than the Prizm snake I made in BASIC back in January. The problem with that was that drawing commands were way too slow and difficult to use.

btw you will want to remove the text at the bottom of the menu icons because the OS automatically adds the the name of the app. Or you could just wait for me to finish my asm shell, but that could take anywhere from 2 weeks to 1 month to finish Tongue

I'm making it in C right now, and thanks for the icon suggestions Smiley thanks all for support Cheesy
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« Reply #5 on: 01 May, 2011, 22:25:17 »
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Ashbad, also remember that if you use the Getkey() syscall, you will not have access to the entire screen for drawing. You will instead have access to that portion of the screen normally accessible from BASIC.

This looks nice. Good luck!
« Last Edit: 01 May, 2011, 22:25:44 by Qwerty.55 » Logged
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« Reply #6 on: 02 May, 2011, 04:32:59 »
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Or if you prefer you're own text, you could just leave the program name field blank. This isn't the name of the file, but just the text contained within the header that the OS uses. And don't worry to much about the getkey() call. Because the keys are memory mapped (you can view this in insight) it's really easy to make your own call that doesn't need any bloated OS call to work. Seriously getkey() is an overly bloated call that draws the screen, will run the screen receiver, does getkey duh, will exit your apps, and draw the status bar if shift or alpha is pressed. But then again getkey() is the only way I know of so far to exit apps Tongue
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List of stuff I need to do before September:
1. Finish the Emulator of the Casio Prizm (in active development)
2. Finish the the SH3 asm IDE/assembler/linker program (in active development)
3. Create a partial Java virtual machine  for the Prizm (not started)
4. Create Axe for the Prizm with an Axe legacy mode (in planning phase)
5. Develop a large set of C and asm libraries for the Prizm (some progress)
6. Create an emulator of the 83+ for the Prizm (not started)
7. Create a well polished game that showcases the ability of the Casio Prizm (not started)
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« Reply #7 on: 02 May, 2011, 23:34:21 »
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Awesome, I wish you good luck Ashbad! ALso feel free to ask help in the Prizm hacking section if you need any. I'm sure a lot of people there will be happy to help. Smiley
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« Reply #8 on: 03 May, 2011, 00:15:28 »
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z80man, a way to exit apps:

Code: Select All | Copy To Clipboard

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sts.l pr,@-r15
...
stc @r15+,pr
rts
nop

The OS jumps to the program as if it's a subroutine, so you can just rts without generating any serious errors.
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« Reply #9 on: 03 May, 2011, 14:14:29 »
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Quote from: Qwerty.55 on 03 May, 2011, 00:15:28
The OS jumps to the program as if it's a subroutine, so you can just rts without generating any serious errors.
Are you sure about that? I've seen discussions on IRC where people have said that it's not like that...
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« Reply #10 on: 09 May, 2011, 13:39:41 »
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So Ashbad, how's this going?
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DJ Omnimaga
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« Reply #11 on: 12 May, 2011, 03:18:08 »
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I'm also curious how is it progressing? Are you also going the same route as you told me via PM or will the game remains SFW?
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« Reply #12 on: 12 May, 2011, 04:55:14 »
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Quote from: JosJuice on 03 May, 2011, 14:14:29
Quote from: Qwerty.55 on 03 May, 2011, 00:15:28
The OS jumps to the program as if it's a subroutine, so you can just rts without generating any serious errors.
Are you sure about that? I've seen discussions on IRC where people have said that it's not like that...
Why don't we check what's in the PR when staring programs? We can check the code around the returned address and see how apps are initiated. And I did see how the code is loaded. As we know apps are ran from flash, but how it is done is the physical address of the app is mapped to virtual memory at 0x30000000. This would suggest that 0x30000000 is not a static address, but is remapped every time an app is ran.

@Qwerty you had a minor error in your code. fix'd it for ya Wink

Code: Select All | Copy To Clipboard

1
2
3
4
5
sts.l pr,@-r15
...
lds.l @r15+,pr
rts
nop
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List of stuff I need to do before September:
1. Finish the Emulator of the Casio Prizm (in active development)
2. Finish the the SH3 asm IDE/assembler/linker program (in active development)
3. Create a partial Java virtual machine  for the Prizm (not started)
4. Create Axe for the Prizm with an Axe legacy mode (in planning phase)
5. Develop a large set of C and asm libraries for the Prizm (some progress)
6. Create an emulator of the 83+ for the Prizm (not started)
7. Create a well polished game that showcases the ability of the Casio Prizm (not started)
Ashbad
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« Reply #13 on: 12 May, 2011, 22:18:08 »
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This is on hold until a stable version of Emerald is released -- I plan to make this as an emerald-based game Wink
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DJ Omnimaga
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« Reply #14 on: 12 May, 2011, 22:25:55 »
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Ah ok. I hope you finish this, Pyrix, TanF and the others at one point too. I can't wait for screenshots too.
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