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.
[v2.3] MECB MC6809 (or HD6309) CPU Card
Re: [v2.3] MECB MC6809 (or HD6309) CPU Card
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!
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
- Posts: 38
- Joined: Sun Nov 19, 2023 10:21 am
Re: [v2.3] MECB MC6809 (or HD6309) CPU Card
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 wrote: ↑Fri Apr 12, 2024 7:00 pm 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!
Re: [v2.3] MECB MC6809 (or HD6309) CPU Card
and... I'm pretty sure it was you who inspired me to add reset headers to my CPU Cards.bugeyedcreepy wrote: ↑Sun Apr 21, 2024 11:24 am 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!
- bugeyedcreepy
- Posts: 38
- Joined: Sun Nov 19, 2023 10:21 am
Re: [v2.3] MECB MC6809 (or HD6309) CPU Card
lol!! I'm totally gonna take that as a WIN!!Editor wrote: ↑Wed Apr 24, 2024 7:15 amand... I'm pretty sure it was you who inspired me to add reset headers to my CPU Cards.bugeyedcreepy wrote: ↑Sun Apr 21, 2024 11:24 am 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!