Please excuse horrible blurry photo, but I think all the soldering is done â€”
This adds the crystal sockets, the 32.768 kHz RTC crystal, the status LED(s) and the reset button.
A whole new board I soldered up is the Mini-PPISD. It adds (slow) SD card storage to an SBC board:
Man, but those surface mount SD card pads are a pain. I had to get flux on the PCB pad and the bottom of the SD connector, load a little blob of solder on the iron, then warm up the pad and roll the solder into place. It made a satisfying little Zsht! noise as the flux burnt off, and the molten solder got drawn under the pad by capillary action.
Next up is checking the power and ground continuity, adding the chips, building a null modem (grr; I hate RS232, really) and finding a case. I may already have one, but I may forage at Above All to get a 3Â½” floppy drive and enclosure. I definitely have an old Turbo/reset button from an XT that would make a great reset breakout.