Super Famicast pre-pre-pre-alpha release

Storminator16 · Post by **Storminator16** » Fri Jan 09, 2004 9:57 am

Ok, now I'm confused. I thought I just had to rename '/rd/frognes.zip' with '/cd/<any zip file here>'? K, now I halfway know where I went wrong

Strapping Scherzo · Post by **Strapping Scherzo** » Fri Jan 09, 2004 10:29 am

You have to make sure that the length of '/rd/frognes.zip', which is 15 characters, is the same as the filename length of the file you're trying to point to. Changing the length of that string totally screws up the whole binary and will surely crash it. My advice is to simply change the rd to cd and name the zip that you're going to put on the cd frognes.zip. Or, just be patient.

Storminator16 · Post by **Storminator16** » Fri Jan 09, 2004 10:43 am

Thanks. Been awhile since I hex edited anything (did NES roms before) so I forgot about the problem about making sure the character lengths were the same. That's was in response to Reaper's knock on me (but I'm trying to "keep it positive").

BlackAura · Post by **BlackAura** » Fri Jan 09, 2004 10:46 am

As scherzo said, the simplest way is to change the /rd/ to /cd/ and put the ROM in a zip file called frognes.zip.

scherzo - The DMA copy routine actually works fine. The ghosting effect is caused by the CPU cache - some of the data that was written to the buffer is still in the cache, so when it gets DMAed over, you get bits from the previous frame. That manifested itself in Genesis Plus as small fragments of the previous frame in the bottom 16 lines or so of the image.

The fix is to manually flush the cache. On Genesis Plus, the corruption was limited to the last 16KB of data written to the buffer, which was all at the end, so I just flushed that part, and then DMAed it all over. Worked perfectly.

To do it, I used the dcache_flush function from KOS:

Code: Select all

dcache_flush(uint32 start, uint32 count);

If you're having to flush the entire frame though, you may as well simply not bother.

Storminator16 · Post by **Storminator16** » Fri Jan 09, 2004 11:34 am

Thanks for cleaning this up, Zac

Strapping Scherzo · Post by **Strapping Scherzo** » Fri Jan 09, 2004 11:48 am

Thanks, the flushing of the cache cleans up the garbage. However, when I tested with Super Mario World, I could get away with flushing just the bottom half of the screen, but when testing with Street Fighter 2, there's garbage all the way at the top meaning I'd have to flush it all. Also, I'm not sure if I gained any speed from the previous way I was doing it. I'll test a litttle bit more, but not too much. I want to write more code.

ZacMc · Post by **ZacMc** » Fri Jan 09, 2004 11:54 am

WillSams wrote:Thanks for cleaning this up, Zac

No problem. How did you know it was me?

Ian Micheal · Post by **Ian Micheal** » Fri Jan 09, 2004 11:57 am

ZacMc wrote:
WillSams wrote:Thanks for cleaning this up, Zac
No problem. How did you know it was me?

Thanks for cleaning up wills flaming for me.

scherzo if you join the kos mailling list there was more detail on this . Plus if you want to see some good video code check out Dreamfrodo. The source is provided and is very well done. He uses other memory areas which are up to 4 times faster then standard.

ZacMc · Post by **ZacMc** » Fri Jan 09, 2004 12:03 pm

Ian Micheal wrote:
ZacMc wrote:
WillSams wrote:Thanks for cleaning this up, Zac
No problem. How did you know it was me?
Thanks for cleaning up wills flaming for me.

You flamed him. He didn't flame anyone.. Except himself

Storminator16 · Post by **Storminator16** » Fri Jan 09, 2004 12:06 pm

ZacMc wrote:
Ian Micheal wrote:
ZacMc wrote:
WillSams wrote:Thanks for cleaning this up, Zac
No problem. How did you know it was me?
Thanks for cleaning up wills flaming for me.
You flamed him. He didn't flame anyone.. Except himself

LMAO on the flaming myself bit. Also, I've noticed how he cleaned up his last post and threw something out of left field in there. Hmmm.

Anyway, I noticed you were the only mod/admin online

Ian Micheal · Post by **Ian Micheal** » Fri Jan 09, 2004 12:08 pm

ZacMc wrote:
Ian Micheal wrote:
ZacMc wrote:
WillSams wrote:Thanks for cleaning this up, Zac
No problem. How did you know it was me?
Thanks for cleaning up wills flaming for me.
You flamed him. He didn't flame anyone.. Except himself

Well i knew he flamed some one. Thats rather funny zac.

ZacMc · Post by **ZacMc** » Fri Jan 09, 2004 12:09 pm

I noticed you were the only mod/admin online

Dr.Z was online.. but I think his account is "hidden". I might have to split this topic again

Post by **Dr. Zoidberg** » Fri Jan 09, 2004 12:12 pm

ZacMc wrote:
I noticed you were the only mod/admin online
Dr.Z was online.. but I think his account is "hidden".

Yeah it is, got to stay undercover so the perps can't see me.

Moi · Post by **Moi** » Fri Jan 09, 2004 9:40 pm

Will: unscrambled binaries are always easier to hack! in the scrambled bin you can only find 'frognes.' and search for 'zip' to change the whole filename. in an unscrabled bin you can find the complete '/rd/frognes.zip' and change it to whatever you want.

Storminator16 · Post by **Storminator16** » Sat Jan 10, 2004 10:09 am

I've got it already. Thanks.

Hilltopper · Post by **Hilltopper** » Sat Jan 10, 2004 5:03 pm

I hexedited the binary and had it load star ocean. The game actually loaded but the graphics decompression did not work. I was just wondering what would have caused the messup.

Alexvrb · Post by **Alexvrb** » Sat Jan 10, 2004 5:48 pm

He hasn't been able to get that working yet.

Hilltopper · Post by **Hilltopper** » Sat Jan 10, 2004 6:14 pm

qoute from scherzo "...Zips seem to be working fine as of yet. However, I tried loading Street Fighter Alpha 2 to see the builtin S-DD1 decompression in action but the emu crashed. Something to look into later on."

I took this to mean that the emu wouldn't even load the rom. I may be wrong though. The Star Ocean rom loaded but no graphics were decompressed. I was under the impression that S-DD1 had been ported but that he was unable to test it because the SFA2 rom wouldn't load. Anyway, I don't really know for sure, I may have just misinterpreted his post.

NightHammer · Post by **NightHammer** » Sun Jan 11, 2004 1:18 am

I tried out Sailor Moon: AS (the english trans) and Earthbound. They both ran about 10% (between 5 and 6/60).

Oh! and:

Nero DAO image
and
Nero TAO image

It looks great...can't wait to see what you do with it!

Later!
NightHammer

Storminator16 · Post by **Storminator16** » Sun Jan 11, 2004 8:16 am

What's in the images?