6809 SBC (was Editor religious wars (was Re: Museums))
mcguire at neurotica.com
Fri Jan 29 14:04:21 CST 2010
On Jan 28, 2010, at 11:23 PM, Ben wrote:
>> It'll do a good bit more than that. My high school used a UniFLEX
>> that was a 2MHz 6809 with about a dozen 1200-baud terminals. It
>> was used
>> to teach Pascal. Interactive performance was typically pretty good.
> The Missing 6809 UniFLEX Archive
> This needs to mirrored.
>> And you do realize "PDP-11" spanned some two and a half decades
>> and more
>> than a dozen implementations with a huge range of processing power
>> ranging from "wimpy" to "big clanging brass balls", right?
> Yes, but the PDP 11 was designed to have raw power from the original
> design. OK, they goofed on a basic address space of 18 bits.
16 bits, actually. The two MMU architectures extended that to 18
and 22 bits. I wouldn't call it a goof considering the first one
came out in 1970. For a small lab minicomputer in 1970, 64KB isn't
bad at all.
> The 68000
> comes close in design but offhand I still think the 68000 had only
> 16 bit addressing*. I do know it took a few revisions of the chip
> to get
> a MMU for it. By this time I moved from a COCO II to a PC clone
> and never got to play with well designed chips.
You did that to yourself, man. ;) And who on this list only has
Port Charlotte, FL
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