Difference between revisions of "84PCSE:OS:Applications"

Revision as of 12:58, 30 May 2013

Creating an application for the TI-84 Plus C SE is just like creating an application for the TI-8x B&W series. Aside from all the changes to OS equates and hardware, the only thing you need to change is the signing key. Any TI-8x app will include the byte sequence 80120104; simply change this to 8012010F to specify that your application is signed with the TI-84+CSE key. Therefore, an example header might be:

	; Master Field
	.db	80h, 0Fh, 0, 0, 0, 0
	; Name
	.db	80h, 46h, "My App"
	; Disable TI splash screen.
	.db	80h, 90h
	; Revision
	.db	80h, 21h, 0
	; Build
	.db	80h, 31h, 1
	; Pages
	.db	80h, 81h, 1
	; Signing Key ID
	.db	80h, 12h, 01, 0Fh
	; Date stamp.  Nothing ever checks this, so you can put nothing in it.
	.db	03h, 22h, 09h, 00h
	; Date stamp signature.  Since nothing ever checks this, there's no
	; reason ever to update it.  Or even have data in it.
	.db	02h, 00
	; Final field
	.db	80h, 70h
	; There's no need for more padding here.  TI just starts execution after
	; the last field.
	call	MySplashScreen

Then, you need the actual TI-84+CSE 010F.key file to sign the application. This is the file:

40A5269CCDFAD4ACBE816B6C6ED00B984B08E34A3172F504C58DDB9F1E1F92E9B357FCF0314148E80881DBD1B8C8D7E4E81025B9158CB808706E45ABC1E218E982
20FBB377F8EFDAD1C03FF076BB1E7956C0D0B0D7E41613B726F805D5E7F2D23843
21DFED75BE1329EC0AC94C91C23CED4339133CFCDDB3058E5316148AB7DE378BF201

Simply copy and paste that text into a file and name it 010F.key.

If you're using Spasm as your assembler and rabbitsign to sign the application:

spasm myapp.asm myapp.hex
rabbitsign -g -o myapp.8ck myapp.hex

Spasm is can be gotten from its Website: https://wabbit.codeplex.com/wikipage?title=SPASM%20Documentation; similarly, RabbitSign for Linux is at http://www.ticalc.org/archives/files/fileinfo/383/38392.html and RabbitSign for Win32 is at http://www.ticalc.org/archives/files/fileinfo/420/42035.html