CURRENT PROTOTYPE STATUS (SEC 64MHz 68000)

[rpineau]

@PaulJ : I stand corrected :) (I'm always happy to be wrong, it means I'm learning :) ).

Glad to see other programmer being able to JTAG these devices.

[PaulJ]

Rpineau, not an issue, happy to be challenged. :)

[pakman]

I can donate a board if anyone wants to build one up, but will need a Atmel programmer.
I have no idea how long it will take to debug the odd faults though.

I would like to get one!
PCB with 68000 SEC assembled, nothing else.
I will do my tests with a Lattice CPLD, where I have all tools (compiler, programmer) available.
Unfortunately not pin compatible, so it will need some extra wiring..

[exxos]

I will do my tests with a Lattice CPLD, where I have all tools (compiler, programmer) available.
Unfortunately not pin compatible, so it will need some extra wiring..

I can send you a PCB.. but I think trying to force wire a different PLD would require much more effort than just creating a new PCB to fit your lattice PLD...

[exxos]

So using a stencil is a bad idea on the PLD then...

Onto the fun part... :roll:

1.jpg

EDIT:

Looking a bit better now...

I really need to find a easier way of doing this stuff :roll:

4.jpg

So onto the CPU next.. then its in the US cleaner before I do anything else...

[exxos]

Bit better results. I did solder a Videl on a Falcon last year this way without issues.

10.jpg

11.jpg

12.jpg

Still didn't go perfect though...

Did a crappy short video..




Its going in the US to clean up next before I get sticky fingers!

[PhilC]

Is the clear stuff flux? I've not tried adding that to the inside, just solder paste but the needle for the paste is a bit too big, so I end up having to use desoldering braid to remove the extra.

[exxos]

Is the clear stuff flux?

yep.

I've not tried adding that to the inside, just solder paste but the needle for the paste is a bit too big, so I end up having to use desoldering braid to remove the extra.

Yeah braid I use a lot of, and flux. I sent the last boosters off to be assembled for me as just can be doing without the hassle these days. I'm only doing this one myself as I got a bit of free time next week so want to see if I can diagnose the odd faults I keep seeing.

[PhilC]

Well good luck then. Just ordered myself some Atmel Gals as my PAK still doesn't work and I know everything else on it does.

Hope you have better luck that I have so far.

[exxos]

Now to see if the PLD is found.. then onto doing some simple test firmware (pinout is different than last build so have to do some tweaked firmware :roll: )

IMG_3756.JPG

.. and some capacitor soldering voodoo...