Polymodular CPUs

[patchell]

    I would be in favor of that.  Another posible choice in the same line is the
68EC000, although, getting it is not quite as easy, as you would have to go
through a distributor, but the advantage is that it has an 8 bit bus mode, so
instead of two roms, only one, and instead of two rams only one, plus, your data
bus does not have to be routed 16 lines wide.  I have also used the 68008 in
past projects, but, you can not get these no place no how any more.

    I also like this choice because I own a copy of the SDS Crosscode C++, which
for me, make the programming real easy.

    -Jim

Chris MacDonald wrote:

> > >The 6502 is still available in the US from Jameco Electronics. The 1mHz
> > version is $3.25 in single pieces.
>
> Not to take anything away from this fine CPU, but if a "start from scratch"
> design is decided upon, perhaps the 68000 should be considered instead?
>
> This is a great CPU IMHO, it powered the original Amigas as well as the Sega
> Genesis video game system.  It is far superior to the 6502 in many ways,
> such as: a lot more registers - all 16 bit, larger instruction set, better
> addressing modes, faster clock speeds.  Better than anything Intel had in
> it's day too (he says, diving for cover).  I believe Hal Chamberlin has a
> section on the 68000 in his book and says good things about it. The 8mhz
> version can be had for around $7 U.S. from Jameco.
>
> I have never built a computer system using one so I can't say how many
> support chips it requires or how tricky the hardware design would be, it's
> definitely not an "all-in-one" microcontroller though.
>
> I have written a lot of assembly code for it (more than 5 years though) and
> it is easy to program.  There's probably a 68000 GNU C compiler around as
> well.
>
> Just my two cents.
>
> -Chris

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