25 Jun
2012
25 Jun
'12
3:49 a.m.
On Jun 22, 2012, at 7:31 PM, Andrew Lynch wrote:
Hi
Along these lines, does anyone know of a "minimal" 68030 circuit schematic?
Basically a 68030 CPU with RAM, ROM, and a UART or other simple IO? With
emphasis on "minimal" as in as few components as practical?
I am thinking a 68030 SBC would be neat with a timer, a couple of serial
ports, and a Propeller for VGA, PS/2 keyboard, and microSD. No bus
expansion, IDE, or floppy controller to keep part count low.
68030 is the first of the 68K line with the MMU built in so it would be Un*x
capable assuming 16MB (SIMM) RAM.
I am not looking for Mac, Atari, Amiga, etc compatibility.
Constructive ideas appreciated. Thanks and have a nice day!
That sounds like fun, but do you have a source of PGA '030s readily
available? I haven't been actively looking in some time, but last
I checked you could expect to shell out upwards of $30 each, which
seems a little much for a hobbyist SBC (the sockets aren't the
cheapest things on earth, either). '040s are somewhat easier to
find in quantity and are pretty nice performers, though I've never
looked at an '040 design closely enough to tell whether the bus
interface is that much harder.
- Dave