<On Thu, 11 Jun 1998, R. Stricklin (kjaeros) wrote:
<
<> I suppose a better way of asking that is how is a 'bit sliced' processo
<> or ALU differentiated from a 'normal' one?
The concept was to take a vertical slice of the core of most cpus and make
it so they can be cascaded to the needed width. Some of the common parts
were the 3101 (intel 2 bit slice) and the 6701/2901 4 bit slices.
Their advantages were speed, they were bipolar and in the 70 to early
80s you could make a z80 equivelent using them that was 10mhz and
piplined. Or a custom 20 bit machine.
<BTW, I mentioned a while back that I wrote a simulation of a PDP-8 built
<from 2901's. I finally found the source code for everything but the
<assembler (but I did find a grammar spec). It's not in good enough shap
<to "publish", and I don't plan to spend the time to get it there, but if
<anybody wants a copy, let me know and I'll send you source. (It's
<curses-based, and should run fine on any Unix or DOS box).
I'd love to see that... I have a big bunch of 2901s doing nothing.
Allison
Received on Thu Jun 11 1998 - 17:43:25 BST