 |
SpritesMind.Net
Sega Megadrive/Genesis development
|
| View previous topic :: View next topic |
| Author |
Message |
snkenjoi
Newbie
Joined: 06 Aug 2009
Posts: 6
|
 Posted: Sat Aug 08, 2009 8:39 pm Post subject: |
 |
|
| Chilly Willy wrote: | Sorry, but "loop: bra loop" demos are LAME, not interesting. You'd have a be a complete noob to think otherwise. Just telling it like it is. 
And to tell the truth, when someone comes along gushing about how fantastic such things are, yes, I DO have to be an arse about it. 
Feel free to share your "exciting" potty training stories, but don't get mad at me when I laugh and point.  |
Where is the "loop: bra loop" demo that you're talking about? All the demos I posted actually do something. The thing I mentioned in my first post by someone else was in jest, not to be taken seriously as an attempt to make a small rom.
I think you're over exaggerating how I'm portraying this. I never said it was omg so amazing. I simply said it was cool and thought that people would be interested in it.
Apparently they are, and you seem to be the only one with some kind of problem. |
|
| Back to top |
|
 |
HardWareMan
Very interested
Joined: 15 Dec 2007
Posts: 542
Location: Kazakhstan, Pavlodar
|
| Posted: Sun Aug 09, 2009 2:22 am Post subject: |
|
|
| Shiru wrote: | | If you have real 256 byte ROM, word 'SEGA' probably could be placed at $000, but if it is possible to make the code start somehow after that? I don't know 68K opcodes, what 'SEGA' would be as code? |
Sure, we can use 256 byte ROM and place 'SEGA' at $000000 (or even 128 bytes or 64 bytes and etc, and it will be mirrored to $000100). But then, we need to re set stack pointer (a7), if we want to use it (so small demo can be created without any use of stack, isn't it?). |
|
| Back to top |
|
|
Chilly Willy
Very interested
Joined: 17 Aug 2007
Posts: 1955
|
| Posted: Sun Aug 09, 2009 3:19 pm Post subject: |
|
|
| Shiru wrote: | | If you have real 256 byte ROM, word 'SEGA' probably could be placed at $000, but if it is possible to make the code start somehow after that? I don't know 68K opcodes, what 'SEGA' would be as code? |
It wouldn't matter. The 68000 starts by loading the long at 0 into the SSP, and 4 into the PC. So as long as 4 still pointed to your code, it wouldn't matter that the SSP got set to "SEGA". So I guess a smaller rom than 260 bytes could still work on TMSS as long as it mirrored over the range and had "SEGA" at 0. |
|
| Back to top |
|
|
|
|
You can post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
