4 ms·
My only complaint is that the connector used is not a DB-15 connector at all. It is a DA-15, because it has 15 pins in two rows on 1/10-inch centers in a "subm
by ncmncm 4y ago
My only complaint is that the connector used is not a DB-15 connector at all. It is a DA-15, because it has 15 pins in two rows on 1/10-inch centers in a "subminiature" D shell, or "D-sub".
Other sizes included "DC" with room for 37 pins, "DE" with room for 9, or for 15 crammed closer as for PC video, and DD with room for 3 rows with 50 pins (17, 16, 17).
The DE shell is of course what everybody post-PC insists on also calling "DB", as in "DB-9".
The name "subminiature" distinguishes them from "miniature", and not, which as might be imagined were bigger and even bigger yet.
https://en.m.wikipedia.org/wiki/D-subminiature https://en.m.wikipedia.org/wiki/D-subminiature
- classichasclass 4y agoI'll correct, but compliments are also appreciated. ;)
- ncmncm 4y agoI did geek out. I recall trying a moon-landing program running on a KIM-1, for which I guess the trick was to turn on thrust at the last possible second, to be discovered I guess by binary search. I never knew KIM-1 ROM knew how to talk serial. Or maybe at the time I had no TTY, so ignored it. Now it makes the KIM-1 seem more interesting. Another, more recent abandoned serial memory tech was MRAM, ironically not RAM, which was built into a million Motorola cell phones no longer in use. Or maybe I am mixing it up with something else. What ever happened to spintronics, anyway? Might it still have a future?
- classichasclass 4y agoDo you mean the Butterfield Lunar Lander? That's a classic too. But yes, the built-in serial support is really nice. I'd forgotten about spintronics logic!