If you're ever told to do this to every page of a data sheet, I expect you to stop at nothing to prevent it.

#electronics #datasheet

Added latest PDF schematics for my #68k #homebrew computer to my #gopher hole. I'll be continuing to document my journey up to this point and working on a PCB in the meantime.

gopher://grateful.garden/1/68k/data

#m68k #68k #retrocomputing

And there you go! My #68k #homebrew computer is running at 8MHz!​

I thought for a moment that I had messed something up, but of course it had to be the ROM write. `srec_cat` is your friend.

In the scope shot, top to bottom, we have CLK, /AS, and A0. A sort of "free running" mode, all zeroes in the ROM, i.e. ori.b #0,d0. It happens to work with the exception table and all of that.

Now, on to write a test program and make it say hello over serial! ​

There are so many wires in this thing, I can hold it up like a pizza slice without it bending. ​

#retrocomputing #m68k

When the datasheet tries to tie your shoelaces together

#68k #electronics #datasheet

Of course I had to try my hand at this using some coloured electrical tape, which in hindsight is not the best choice as it strongly self-adheres and is prone to bubbling. I did learn some things though!

- Creating a papyrus-like waffle as your background lets you lift the whole design up
- If your tape is too sticky, stick it onto your jeans before laying it down, then add a second layer that sticks strongly to that.
- Doubling up on strips makes them easier to pull up your cutaways
- Cutting curves with a craft knife is hard, might be helpful to have some curved edges at various radii

Wiring up common signals for low order bytes on the couch. Feels like knitting in a way…

#68k #retrocomputing #homebrewcpu