[v2.3] MECB MC6809 (or HD6309) CPU Card

[Editor]

This post follows on from my earlier Minimalist Europe Card Bus posts and videos. For MECB, to date, I’ve designed and built a Backplane, a Prototype card, and a TMS9929A Video card. The next logical step is to create my first CPU card.

My journey designing my ideal 6809 CPU card was a longer than expected journey. Finaly resolved at v2.2, with a flexible design that allows either Internally clocked or Externally clocked MC6809 or HD6309 CPUs.

The journey starts here: Minimalist Europe Card Bus (MECB ) – MC6809 (or HD6309) CPU Card

Next was a follow-up Part 2 - Testing, whihc can be found here: Minimalist Europe Card Bus (MECB) – MC6809 CPU Card (Part 2 – Testing)

Then I designed v2.x of the CPU card here: Minimalist Europe Card Bus (MECB) – 6809 / 6809E CPU Card v2.x

Finally, we arived at v2.2 here: Minimalist Europe Card Bus (MECB) – 6809 / 6809E CPU Card – v2.2 Update!

The current version is v2.3, which attended to a minor oversight in the v2.2 design, and also added a reset header to allow easily connecting an external reset button. The v2.3 update is detailed here: Minimalist Europe Card Bus (MECB) - 6809 or 6309 CPU Card - v2.3 Update!

To finish off, in another post we pushed the speed of our 6809 CPU Card based system to twice the manufacturers speed rating!
You can find this post here: Minimalist Europe Card Bus (MECB) – Let’s push our 6809 speed!

You'll also find some additional posts in the 6809 Software Forum, where we further tested the 6809 CPU Card based system.

[Editor]

I've just updated this topic (and the above post) to reflect v2.3 as the current version.

v2.3 update fixes a minor oversight in the v2.2 design, and also adds a Reset header to allow easily connecting an external reset button.

The v2.3 update is detailed here: Minimalist Europe Card Bus (MECB) - 6809 or 6309 CPU Card - v2.3 Update!

[bugeyedcreepy]

I've just updated this topic (and the above post) to reflect v2.3 as the current version.

v2.3 update fixes a minor oversight in the v2.2 design, and also adds a Reset header to allow easily connecting an external reset button.

The v2.3 update is detailed here: Minimalist Europe Card Bus (MECB) - 6809 or 6309 CPU Card - v2.3 Update!

Nice! I think I might have to grab myself one of those updated designs - the reset header is indeed a handy feature I can use in my case design!

[Editor]

Nice! I think I might have to grab myself one of those updated designs - the reset header is indeed a handy feature I can use in my case design!

and... I'm pretty sure it was you who inspired me to add reset headers to my CPU Cards.

[bugeyedcreepy]

Nice! I think I might have to grab myself one of those updated designs - the reset header is indeed a handy feature I can use in my case design!

and... I'm pretty sure it was you who inspired me to add reset headers to my CPU Cards.

lol!! I'm totally gonna take that as a WIN!!