Could we port the early 68K Macintosh System to TI's 68k calcs? We would need to use a very early version due to RAM constraints, but it would be possible. We could (barely) fit it in the archive on early TI-92 Pluses and 89s, and maybe even burn a ROM for non-plus 92s.

Could we port the early 68K Macintosh System to TI's 68k calcs? We would need to use a very early version due to RAM constraints, but it would be possible. We could (barely) fit it in the archive on early TI-92 Pluses and 89s, and maybe even burn a ROM for non-plus 92s.

Hi @Logan P  welcome to Omnimaga,

IIRC i've seen something like that, some years ago, here: https://www.omnimaga.org/news/mini-vmac-for-the-ti-nspire/
Not quite a 68k CPU but is a black-and-white MacOS port of sorts.
Have fun 

Not what I'm looking for, but thanks. I did use mini vMac for nSpire once. I think we should port early 68k Mac System to run directly on the 68K calcs.

I had the same idea as you, several years ago, wanting to port the software for the Mac 128K. The first step would be to get the ROM of that machine running. However, that is already pretty hard on itself. You would have to reverse engineer the ROM and do lots of patching considering that the actual hardware of the Mac 128k is very different from a 68k calculator. In theory you could do some emulation, but I don't think a 68k device has enough resources for that.

I don't think it is impossible, it is just very hard, as you need extensive knowledge of both the Mac 128k and 68k calculator hardware.

Hmm... Does the community know how the expansion cards interface with the 92s? It is theoretically possible, but might just be easier to solder on the ROM. There also may be a limit to the amount the 92 can access in ROM.

There are community members that have made their own modules for the TI-92(II), there is information about it floating the web somewhere.

There are community members that have made their own modules for the TI-92(II), there is information about it floating the web somewhere.

Cool! Could you please give me some links?

Maybe a 92II would work better.

As far as i know the TI92II is the same TI92, only with a "II module".

I tried to find those custom modules, but i couldn't find anything! 
Could someone help me?

I don't know where the information is hosted anymore. Also, if you're looking into an unix like OS just use Punix as it was made for 68k calculators.

I did some searching and found these resources:


http://www.oocities.org/siliconvalley/peaks/6869/pinout.html
http://www.oocities.org/siliconvalley/peaks/6869/RSP.txt
http://web.archive.org/web/19991012092724/http://www.daewoo.fr:80/~jjm/ti92.html (see the other pages on his site as well. downside is that all images are missing)
https://github.com/debrouxl/tiemu/blob/master/tiemu/branches/tiemu-3-sound/docs/ti_hw/tie/IO-PORTS.TXT (for IO mapping to the module)