Here's the play list. Very interesting in any case.
https://www.youtube.com/playlist?list=PLHx-SwRLl5qoKvdAbFKXyXTMYqnfq7oDZ

I also recently bought Boisy's book "CoCo The Colorful History of Tandy's Underdog Computer".
I've never owned a CoCo, but it seemed like a very interesting 6809 related ...

bugeyedcreepy wrote: Tue Aug 06, 2024 4:34 am if you have any spare I can use to size up for now, I'd be happy to cost one + postage for you to send one to me

Shouldn't be a problem... PM me your address so I can get a quote on the postage.

Curious @lenzjo, can this ps/2 port handle a mouse as well, and is the internal header I see on the card duplicative of the external ps/2 port or is it a secondary interface?

EDIT:
Wait! just reading up on it now - you know how it is, my ADHD getting away from me & all...


I put the kybd port ...

Have fun with them when they arrive. I've got one in my breadboard at them moment, helping me to debug some 8-bit AVR code. Super easy, compact, and no worries about an LED pulling-down the internal weak pull-up on my GPIO port pins! :geek:


Downside is I won't be here :( I'm leaving in about an ...

According to tracking, NZ Post received my parcel on the 14th July. Today I just received a notification from Royal Mail that they will be delivering it tomorrow the 22nd! Just 8 days from NZ to GB. I've had some GB deliveries that took longer

Awesome stuff!

I do really like that Philips ACIA chip (SCC2691). Hadn't seen it before, and nice skinny DIP retro friendly package, plus some nice more advanced features like quadruple buffered receiver data, a good baud rate generator, and definable flow control pins etc.



Thanks Greg ...

Just uploaded my latest card for MECB to Github . I also uploaded, a couple of days ago, TLCmon , my take on a monitor program for the 6502 card. I won't be doing much hw/sw now until the 28/29th as I am on a house-hunt "holiday" from tomorrow (21st) until next Sunday, but I will be popping in here ...

Michael wrote: Tue Jul 16, 2024 1:36 pm Sounds like a good board. Schematic?

I should have the Kicad stuff, inc. gerbers, uploaded to my Github by Friday once I know it's working. In the meantime here's a render:

I appreciate that. Thanks. I plan on doing a few tutorials on this in order to make it easier for the next person. This will be good for the one where I add the 3rd I/O component (the ACIA : real time clock output to the serial port).

Who should I credit? "Lenzjo"?



Nice set of vids, just ...

Exactly what I needed! Thanks a ton.

With your help, we now have a working M6840 timer in the Hopper runtime for the MECB 6502. Next stop, sound chip!


Better late than never ;) ...

I set up timer 1 in continuous mode and made a real time clock.. first the constants:

PTM .EQ PTM_BASE ...