Calculator Community > Other Calc-Related Projects and Ideas

68k MacOS?

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Logan P:
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.

Jonson26:
The ROM-chip idea sounds very interesting to me (i own a ti-92 myself  :)). I just have one question: Do you think about installing the chip trough soldering or the expansion module slot?

SpiroH:

--- Quote from: Logan P on April 15, 2017, 12:17:59 am ---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.

--- End quote ---
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  ;)

Logan P:
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.



--- Quote from: Jonson26 on April 15, 2017, 07:57:36 am ---The ROM-chip idea sounds very interesting to me (i own a ti-92 myself  :)). I just have one question: Do you think about installing the chip trough soldering or the expansion module slot?

--- End quote ---
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.

Edit (Eeems): Merged double post

Jim Bauwens:

--- Quote from: Logan P on April 15, 2017, 07:36:57 pm ---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.

--- End quote ---
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.


--- Quote from: Logan P on April 15, 2017, 07:39:13 pm ---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.

--- End quote ---

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

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