6128+ floppy pinout (ribbon cable)

[emuola]

Trying to build a "26 pin to 34 pin" ribbon cable for my hxc inside my forthcoming 6128+ Pin 1 is clearly marked in the hxc, but is the red wire in this picture pin 1 (borrowed the picture from the sticky thread, hope it's ok)? Just asking, because it seems that Amstrad guys screwed up a few "standard" pinouts just for fun... And of course I'm assuming here that the wiring of the floppy cable inside 6128+ is the same compared to standard 6128. Sorry, if the question is unbelieveably dumb. I'm no guru when it comes to electronics...

[beaker]

I think it's different but don't quote me as I was going to do the same.

You could always cheat and buy an adapter from urbon-retro on ebay:

Amstrad CPC Spectrum +3 internal ribbon cable adaptor | eBay

Just remember to tell him it's for the plus model.

In the end I got persuaded to leave the working floppy in there but have one of those cables in my draw if the drive ever gives up the ghost...

Beaker

[MaV]

We've had that problem a long time ago:
SD HxC floppy disk emulator questions

I think you can find the info you need there concerning the ribbon cable; the ribbon cable is the same on the CPC+ and the normal CPC.

The CPC+ provides only 5v, the normal CPC 12v and 5v. And the lines are exactly in the wrong place so you have to exchange them. Be extra careful on the normal CPC's 12v line, since that can fry your electronics if placed wrong.
So check, double-check, and check again!

[emuola]

Ok, thanks guys for the info once again There's at least 2 different versions of the "adapter" schematics however:



and the other one is here:

Internal floppy conntector CD201 to standard floppy connector 34pin
===================================================================
(flat cable / crimp variant view)

Note: Disconnect wire 24-32 /S1 if you use a side selector switch
      which is connected to the floppy drive.

CD201 PCF SIGNAL
   26  34 /RDY
   25  33 GND
   24  32 /S1
   23  31 GND
   22  30 /RDAT
   21  29 GND
   20  28 /WPT
   19  27 GND
   18  26 /TRK0
   17  25 GND
   16  24 /WGAT
   15  23 GND
   14  22 /WDAT
   13  21 GND
   12  20 /STEP
   11  19 GND
   10  18 /DIR
   09  17 GND
   08  16 /MED1
   07  15 GND
   06  14 NC
   05  13 GND
   04  12 /DRV1
       11 GND
       10 NC
   03  09 GND
   02  08 /IND
   01  07 GND
       06 NC
       05 NC
       04 NC
       03 NC
       02 NC
       01 NC


In the latter there's only the 3 first pins of the ribbon cable connected before the gap, but in the first there's 6 pins connected before the gap. Do both of these work? I already built a cable according to the latter schematics (from the wiki).




Cannot test the adapter just yet. What say you?

[MaV]

Ok, thanks guys for the info once again There's at least 2 different versions of the "adapter" schematics however:

Intriguing!

Let's see ... Cholo did this in another post:
3 1/2" disk on the DDI-1

in particular this picture might be helpful:
http://img15.imageshack.us/img15/2454/amsdrive35.jpg

Here he connects a standard 3" ribbon cable to a 3,5" drive. And he used 6 before the gap.
It's possible that most of the are simply connected to GND. I need to find the tables for both 26 and 34 pin connections.