Tim Shoppa wrote about Microchip PIC microcontrollers:
What you find "bizarre" is almost certainly
what I like about them. 12-,
13-, and 14-bit wide instruction words, Harvard architecture so that
You've been using them for quite a while if you remember the 13-bit ones. :-)
IIRC, that was the PIC1670 (not PIC16C70!); perhaps there were some other
13-bitters. That was before I started with PICs, though I have the old data
books around here somewhere.