65uino Rev 1

[AndersNielsen]

Hi!

I've given the 65uino an overhaul, removed the clock generation from Rev 0 and 1MHz oscillator, to make room for an 8MHz oscillator and '161 divider for serializers and such - and the option to run the main 6507 clock at 2MHz. Unsure if the 6532 will keep up.
I've also made enough space to break out the busses, as well as a '138 to clear some address space for expansions - it used to only have ROM address decoded for the top half and the 6532 having the bottom half. Seems reasonable to leave space for other things.

Did I mess anything up? Particularly with the '138 address decoding, clock generation and USB uart(proven separately though) - the rest is pretty well tested so far.

[drogon]

Nice.

I've been running my Project-28 board at 2Mhz for some time and it's been rock solid - I'm using Rockwell 6507's and a W65C22 - I've no idea how the UMC parts will fare at 2Mhz...

-Gordon

[AndersNielsen]

Indeed, I am expecting the 6507 to run nicely at 2MHz but the 6532 isn’t rated for it and I haven’t tried any of the fancy tricks to run them at different frequencies.
I guess we’ll see

[AndersNielsen]

This is close to what the PCB will look like.