semi-homemade micro

[Chuck Guzis]

On 11/14/2005 at 5:57 PM Jim Battle wrote:

>>"The PDP-8 was a 12-bit computer with 4096 words of memory. It had only
>eight 
>instructions, one full register, the accumulator (AC), and a single-bit 
>register, the link (L) bit. The machine operated at a clock rate of 1 MHz,
>and 
>took  10 clocks for each instruction, so that it ran at 0.1MIPS."

Time to add some commentary to the wiki, methinks.

IIRC, the cycle time of the original straight 8 was 1.5 usec.  Instruction
times in cycles is given here:

http://www.cs.uiowa.edu/~jones/pdp8/refcard/65.html