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Anyone have a IIvx (or IIvi) and a Floppy Emu?

Okay, got my IIvx apart to look at this. I was thinking I'd use a test lead clippy thing between pin 14 on the floppy cable and pin 19 on the the SWIM chip but the connector is way too big. Any suggestions on a "IC pin clip" I can buy that will work on the SWIM?

0FDFFEBD-C127-413F-AB1F-FC0562944590.jpeg
 
These look very similar to what I use... mine have short little flying leads on them but the principle is the same. Not very cheap, though, by the looks of things.
 
Ugh. So the micro jumpers arrived and I was able to connect to pin 19 on the SWIM chip. Power-on made buzzing sound out the speaker in place of the start up chime, the Floppy EMU booted up right in HD20 mode but the screen just showed a gray square. No mouse pointer, rounded screen corners, or ? icon, or sad/happy Mac. Worse removing everything its still in the same state. Resetting the PRAM the buzzing repeats, again in place of the start up chime but no joy...
 
Oof, that's no good. Can't think what would have caused that to happen. Even if the worst happened and you made a severe wiring error, I could see it frying the SWIM chip, but bringing the whole machine down like this is very unexpected.

Are you using the internal video or a nubus card? I'm curious because the orientation of the PLCC makes it look like it's difficult to manage getting a clip on while the VRAM SIMMs are in place...
 
Scott Squires said:
Are you running without VRAM? Is that the issue?
Click to expand...
Pfffft! Like I wouldn't check that there is VRAM installed! I mean really!

<runs up stairs to check>

...so um. yeah... somebody must have removed that when I wasn't looking. I blame the cat. :p

Connecting everything else to do the test again. Thanks!
 
Hey, I tried clipping onto my IIvx's egret pin 14 instead of the SWIM (facepalm). I had spent a lot of time cleaning corrosion off the egret and just had it stuck in my head. The clip broke the weakened leg off (double facepalm). So, uh, be careful not to short or break anything. It does seem very cramped with the VRAM SIMMs installed. If my machine were working, I might actually solder a 30 AWG wire instead of clipping. (Depends on one's soldering skills of course.)
 
Funny, right there with you. With the VRAM installed I can’t use my new micro jumper and have the power supply installed:

56EC723A-446C-41EA-BA00-2E7F22B113F3.jpeg

…so after all that solder it is:

0DEA6B10-E87F-407E-A146-0E617ED56D4F.jpeg
 
Pretty sure I have it right, Enable2 is pin 19 on the SWIM chip, on the IIvx board pin 20 has a silkscreen label, I’ve connected one pin before that. Found this to double check:

C01316F6-A334-4B5E-8239-F95DA397D020.jpeg
 
Last edited:
Also Pin 14 is Enable2 on the 20 pin floppy cable going to the Floppy EMU, that’s what I’m jumpering to pin 19 on the SWIM chip.
 
Ahh, I got floppy connector vs swim pinout mixed up. Also forgot PLCCs have an obnoxious numbering scheme. Good thing you're prepared!!
 
Another pic of the wiring in case folks are interested:

2B8726C9-EB8B-46EE-BB18-92C563E3DCC6.jpeg

At the bottom of the pic you can see the Floppy EMU 20-pin ribbon cable connector. Checking and double checking all the single pin rainbow colored jumpers was annoying but worth it.
 
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