Quote from: Camdenmil on September 05, 2011, 10:33:32 am

Just like later versions of the ti 81, the ti 80 has an a spot for soldering a jack. Makes you wonder why ti put the circuitry for a link port and didn't bother putting one on the calcs.

Some 80s shipped with a link port for use with teacher software. Which only had the ability to take screenshots.

Yes, the jack is soldered on TI-80 ViewScreen (teachers).
But the OS only supports (natively) screen captures transfers.

According to epsstore.ti.com, a special TI-Graph Link Software is needed.
But I've never been able to find it.

Any info about that?

980khz of raw processing power...fun

It's cool to see yet another old calc being hacked.
@Critor: I'd wager it's been removed since the calc is no longer in production. Searching on google I read that The TI-80 viewscreen calcs came with their TI graph link software included. I only searched briefly though, and I have no idea how accurate the information is. The other possibility is to try to email TI-cares, but I'm unsure if they'd even have access to the old linking software.

Lol, not even a response? Wow, it seems they are getting slack. Hmm.. well, we do have a few members with quite massive calc. collections. Maybe you should ask around.

Wouldn't this mean all ti graphing calcs are now programmable with asm. (hopefully the nspire cx will be programmable with time)

Does anybody have any documentation of the processor's opcodes?

It's a proprietary 16-bits processor, which has never been used in anything else than the TI-80 to our knowledge.

So the documentation will have to be built by ourselves by looking at the ROM dumps.

How did we determine that it was a 16-bit processor?

By looking at the ROM dumps.

Odd and even code frequencies are very different, which means that instructions are 16-bits wide.


Also, in the self test keyboard test, the displayed hexadecimal key code is 16-bits wide (it begins by 0x00).

16-bit instructions doesn't mean a 16-bit processor, though. The TI-34 Multiview and co. that we dumped a while back had a 4-bit processor with 16-bit instructions.