I wonder if Casio will have emus, because it is unlikely for me to get one anytime soon... 

Same here.

I guess someone will have to explore the Prizm and make some kind of SDK until the Casio one comes :S

I've already been working on it for quite some time.

Quote from: ScoutDavid on December 23, 2010, 06:34:30 am

I guess someone will have to explore the Prizm and make some kind of SDK until the Casio one comes :S

Finding a way to run unsigned code might be tricky... Maybe as tricky as the Nspire.

Doubtful. We will probably have some sort of access to the internal binaries because the Prizm will be viewed as a Flash drive by computers. Actually, let me see if I can do that with a normal flash drive...

EDIT: Yes, it's possible to access the internal binaries of a flash device.

I wouldn't be surprised if it was possible on the Prizm to install an hacked Prizm file (or even backup file) to run assembly programs the same way you do on a TI-73, 82, 85 or 92.

I think he has been looking for in-depth info about the calc in the doc and some file formats.

Ah ok, not sure then X.x

And yeah I noticed I got to 21000 quick. (I slowed down lately, though)

In the meantime, FinaleTI, can you try the Casio BASIC equivalent of the following code?

1->A
While 1
If A=1
Then
Change color to red
Else
Change color to yellow
EndIf
Locate 1,1,"HELLO WORLD"
EndWhile

And tell me if you get something close to orange or if it simply blinks?

If the Prizm is telling the computer that it's a flash drive, it can probably choose which files show up. It doesn't have to grant access to the entire filesystem.

Quote from: ScoutDavid on December 23, 2010, 06:34:30 am

I guess someone will have to explore the Prizm and make some kind of SDK until the Casio one comes :S

Finding a way to run unsigned code might be tricky... Maybe as tricky as the Nspire.

Since it seems some of you are very interested in programming the Prizm, I'll tell you guys this (I apologize if it's very lengthy):

From disassembling the addins given by Casio, the Prizm uses a SuperH 3 processor, which is what Casio has been using in their products for the last decade (fx-9860, fx-9750GII, Classpad 300, Pocket Viewer, etc.) The addins contain a header 0x7000 bytes long which contains info specific to the addin (appname, icon bitmap, date, version, copy protection, size of addin in bytes, etc.) before the actual binary starts. Addins are loaded into memory offset 0x00300000 (execution starts at 0x00307000). You can confirm this yourself if want using objdump that has been cross compiled for SuperH support (such as GCC targeted for sh-elf). SuperH 3 software manual: http://documentation.renesas.com/eng/products/mpumcu/rej09b0317_sh_3sm.pdf

If someone has the time, it should be easy to crack the header format. The header is about ~28KB, large enough to contain the icon bitmap for the addin. Once someone knows what's the icon dimensions are in pixels, you could probably find it in header by using some hex to RGB viewer.

Hardware wise, it seems pretty similar to the fx-9860G (it seems to be just a fx-9860G with an upgraded color screen and a larger flash chip). From this, I'm guessing the operating system is stored in memory offset 0xA0000000 (Area P2).

You can try asking Casio Japan (not the USA branch, they won't be able to help much since they don't design the calcs) for technical info and questions about an SDK. Someone in the community asked Casio Japan for the USB communication specs and their R&D department nicely gave it us. You can keep bugging Casio Japan to release an SDK, but you have to understand it takes them time to make an SDK since they have to polish up their emulator which the R&D guys use in development, package up a compiler/linker, write manuals, etc. Casio doesn't make any money off SDKs, so I don't think it's their top priority. I think when the fx-9860G came out, Casio didn't release an SDK until a year later IIRC, but hopefully we don't have to wait too long this time for the Prizm. According to Casio's website, they plan to release some trial software at the beginning of next year, so you guys should keep a watch out for that since it might include an emulator.

I'd try to find out more, but I'm too busy right now in college. Hopefully you guys will find everything you need to know in the near future. Happy hackings and Merry Christmas!