helpful tip

#retrocomputing

OKAY EVERYBODY

since you all liked this post so much and you've all waited so patiently...

Behold.

RAZOR1911-DIP-16-PROPER.RAR

@gloriouscow 50 points awarded for the Razor 1911 joke

@gloriouscow One might think "well no one would make such a mistake, duh!" but it's actually super easy to accidentally do this. I've had it happen with mere 8-bin chips even... (Ironically I'm thinking of socketed OPAMPs here as I don't have so much experience with PCs where you could actually swap chips out, but in other words it's still a thing.)

The worst thing was I had one that bent enough that when I tried to bend it back with pliers it broke off.  

@nazokiyoubinbou we've all done it. maybe not three simultaneously - the internally bent pin is particularly nefarious because its hard to see.
@gloriouscow Oof, you're not kidding. I missed it even in the illustration here clearly showing it...
@gloriouscow perhaps spin it 180 degrees.

@adorfer

it is a scan from a manual

@adorfer @gloriouscow I’m pretty sure you should.

The indent on the IC should align with the on the DIP socket.

@gloriouscow

You laugh but I'm saving this to my clip art folder for when I write instructions for my soldering classes. It's a good clear drawing of everything that can go wrong.

@futurebird @gloriouscow Needs the off-by-one pin error and the magic smoke escaping to show everything.

@kim @gloriouscow

Or have the whole thing in backwards...

@futurebird @gloriouscow My usual trick is to carefully pay attention to the notch/dot to ensure that doesn't happen, oblivious to Past Me having failed to be as rigorous when installing the socket. 🤦‍♀️
@gloriouscow Half my console mods look like this... But it's on purpose. You gotta route some legs elsewhere on the motherboard. 😩
@gloriouscow this image hurts, like having your own fingers bent the wrong way
@gloriouscow you're telling me i've been doing it wrong zhis whole time??
@gloriouscow reminds me of piggybacking ROM/DRAM chips
(you have to have separate CAS/RAS and CS pins, most other are connected 1:1 so its often easier to just lift the few and solder the rest one on another)
@gorplop It's the lazy way to replace a bad DRAM, i've done it :D

@gloriouscow

Oh its ok, that's why there's so many pins.

@gloriouscow I felt physical pain seeing this.
@gloriouscow I just know these things demand a blood sacrifice. Poking your finger, ideally under the finger nails or something.
@gloriouscow the pin that is fourth from the right, bent outwards: the socket does not have a hole for that pin
the chip installation was doomed to be incorrect
@gloriouscow that hurts to look at
@gloriouscow depends, if you want to alter the functionality of the chip this might be correct.
@gloriouscow Please CW your gore posts.
@gloriouscow so thats why my stuff won't work
@gloriouscow reminds me of the WOM (write-only memory) data sheet chart of “NUMBER OF INSERTIONS” versus “NUMBER OF INTACT PINS REMAINING”
@gloriouscow Nice illustration but it misses some important details. Mainly, which are the pins that should be bent for correct installation :P
@gloriouscow I’ve been there. Oh yes, I’ve been there #DIP
@gloriouscow you're all laughing but chip packages only do this when they're in GREAT DISTRESS!
@gloriouscow New PCB assembly method idea: DIP staplers. The legs are strong enough to puncture the PCB material, and the legs get folded over the pads on the underside to hold the chip in place which then get little blobs of solder for the electrical connection (or maybe the solder blobs are there already and the legs get heated up by the stapler anvil as they're bent around).

@gloriouscow

"Friends don't let friends make their chips do the splits." 😆

cc: @mirabilos

@rl_dane @gloriouscow I did have to unbend some recently. I’m a software person, damnit.
@gloriouscow Are you trying to circumvent copy protection?