PDP-8 on FPGA project: update

Philipp Hachtmann hachti at hachti.de
Thu Dec 18 09:31:51 CST 2008

Here's an important update:
I just gave the new design one hour of debug time...
Nothing is fine yet, many features still untested (interrupt, mq, memory 

BUT: It currently runs Chekmo at 100 Mhz!!!

There are some severe synthesis warnings I simply ignored. Will 
investigate in the process of further debugging the stuff.

A 100Mhz Chekmo is a big step forward. And all that on a Spartan-3. On a 
Virtex-2 or -4 FPGA this would become even faster.

Best wishes,
Philipp :-)


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