LispOS on a 68000
Thu, 14 May 1998 15:32:23 -0700 (PDT)
>From firstname.lastname@example.org Thu May 14 15:14:35 1998
>Resent-Date: Thu, 14 May 1998 17:45:31 -0400 (EDT)
>Date: Thu, 14 May 1998 16:46:21 -0500
>From: David Tillman <email@example.com>
>Subject: Re: LispOS on a 68000
>X-Mailing-List: <firstname.lastname@example.org> archive/latest/2319
>>>>>> Mike McDonald <email@example.com> writes:
>> Wow! I haven't heard of anyone trying to hack a homebrewed
>> system in years! Everyone seems to just buy an already built
>> motherboard (most likely, a PC one) and then hack
>> software. Sounds like fun. (Really sounds like things from my
>> past. Say fifteens years ago! Anyone remeber a thing called the
>> "Big Board"?) Are you building your own MB to learn how or
> I never used a big board, I did have a brief love affair
> with CP/M in my teens. No, I'm not building one to learn
> how, I already know how (or did). Of course, that was back
> when the 6809 was hot. At the moment I am sick of the constant
> MHz race in processors and would like an architecture that
> does the Right Thing.
Yup, when the 6809 was hot is about the right time frame for me
too. As for the "Right Thing", I understand the desire! Boy do I!
> On the down side, Motorola has issued a End of Life statement
> for the normal 68030. The 68EC030 continues to be supported
> but lacks the MMU (why?). I haven't checked the other variants
> for MMU suport. Of course, you could tack on a 68332 MMU unit...
Well, if they're EOLed, you should be able to pick up a bunch
pretty cheaply. Until they become scarce, that is. As Dwight Hughes
points out, you might want to consider a 040. Or for that matter, an
> Something this hardware-centric may be a bit off-topic for
> the LispOS list. If anyone wants to discuss it further, I
> would be glad to discuss it here, or I can start a lisp-hardware
Heck, with all of the other ideas floated around here over the last
year, how can anything be called "off topic"? I find it to be a
refreshing and interesting idea.
> I think my goals would be:
> a. Have *one* variant of video board.
> b. Have *one* variant of I/O board.
> c. Use standard SIMMs.
> d. Use SCSI as much as possible.
Sounds like an intelligent choice.
> I realize that using a 40 MHz processor may seem like a giant
> step back. The problem is, newer, faster processors are just
> to finicky to diddle with on a one off basis. Otherwise I would
> be looking at the PowerPC or an Alpha.
Ah, my "Right Thing" machine would have been an Alpha running Linux
and OpenGenera. I could use Linux and X to run all of those annoying
little apps that I haven't gotten around to writting while still
enjoying a liberation of the soul whilest using Genera. Oh well, back
to hacking C++. :-(