MULTIPROCESSING FOR THE IMPOVERISHED Part 1: a 6809 Uniprocessor

[Eric Smith]

On Tue, Aug 6, 2019 at 1:19 AM Eric Smith <spacewar at gmail.com> wrote:

> With the [MC6809]E version you have to supply a quadrature clock, but all
> that's required to generate that is a single-phase 4x clock (which you need
> with either the E or non-E part) and a single 74HCT74.
>

In case anyone needs to see how this is done, I've attached a schematic. It
is shown with an 8 MHz half-can oscillator, which will result in 2 MHz
outputs suitable for an MC68B09E, which is rated for 2 MHz operation.