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DIY:Floppy Drives

1,243 bytes added, 14:09, 4 May 2017
/* Standard floppy connector 34pin */
I have recently received a CPC6128 and had the problems to connect 2x3,5" drives to the CPC (internally and externally). The main problem was, that i've could not find detailed informations about the wireing and the signals (even here on CPCWIKI.EU) This is my contribution to this issue. I will add the wireing for the DDI-1 soon. === Preface ===
This document shows pinning list, wiring diagrams and signal descriptions found on a CPC6128.  <br>  === Multi-Adaptor Cable for External Floppies / HxC emulator ===  [[Image:Floppy_Cable.png|800px|centre]]  === Adaptor Cable for Internal Floppies / HxC emulator === This cable assumes that the drive has been set to DS0 / ID0 and provides a ready signal. For the HxC not a problem, just a simple jumper setting, for floppies this may involve making some mods to the drive.  [[Image:Internal_HxC_Cable.png|800px|centre]]  I've shown the cable from several views to highlight the fact that the connectors don't face the same way on the cable. First crimp the 26way connector as shown in the diagram. Then split the first 6 wires starting from the side of the red wire. These 6 wires need to be shifted 2 cavities further over before being crimped into the 36way connector. Wire 26 goes directly to pin 34 of the floppy connector. Make sure the keyways / orientation slots of both connectors are as shown in the diagram. The cable needs no bridges, switches or anything else. When you are finished, you should have a cable looking something like this:  [[Image:HxC Adaptor.jpg|600px|centre]]  === Signal assignment on connectors (Floppy <br> === ==== Standard floppy connector, CPC-CD201, CPC-PL-9)34pin<br> ====
<pre>Floppy | Signal description
connector | for standard floppy 34 pin connector 34pin |
----------+---------------------------------------------------
1..33 | GND
2 | /DS (density select 1=low desnity / 0=high densityDCD Disk Change Detect 4 | NC/DS4 Drive selct 4 (Not always supported) 6 | NC/INUSE Open collector LED driver 8 | /IND index Index 10 | /MED0 motor enable drive DS0 Drive select 0 12 | /DRV1 drive DS1 Drive select 1 14 | /DRV0 drive DS2 Drive select 02 16 | /MED1 motor MTRON Motor enable drive 1 18 | /DIR direction Direction select 20 | /STEP head Head step 22 | /WDAT write Write data 24 | /WGAT write Write gate 26 | /TRK0 track Track 0 28 | /WPT write Write protect 30 | /RDAT read Read data 32 | /S1 side 1 Side select 34 | /RDY ready (or Ready/DSKCHG) Disk change depending on model or drive configuration</pre> <br>  ==== CPC-CD201 (internal floppy 26pin connector) ====<pre>CPC-CD201 | Signal description internal
| for CPC internal floppy 26 pin connector
| (numbering from amstrads Amstrads repair manual)
----------+---------------------------------------------------
1..25 | GND
26 | /RDY ready (or /DSKCHG) depending on model or drive configuration</pre>
<br>
 
==== CPC-PL-9 (external floppy 34pin centronics connector) ====
<pre>CPC-PL-9 | Signal description external
| for CPC external floppy 34 pin centronics connector | (numbering from amstrads Amstrads repair manual)
---------+--------------------------------------------------
2..34 | GND
<br>
=== Pinning translation between different connectors(CPC-PL-9, Centronics 36pin, Floppy connector 34pin)<br> ===
<pre>Translation from CPC-PL-9 via Centronics 36 pin connector to floppy connector 34pin
===================================================================================
=== Wireing diagrams<br> ===
 ==== External floppy connector CPC-PL-9 to standard floppy connector 34pin ====<pre>External floppy connector PL-9 to standard floppy connector 34pin=================================================================
(flat cable / crimp variant view)
Note: Disconnect wire 03-35-32 /S1 if there is no support by the operating system or if you want to use a side selector switch which is connected to the floppy drive.
PL9 CEN PCF SIGNAL
-- 19 -- NC
-- 01 -- NC
 
</pre>
<br>
 ==== Internal floppy connector CD201 to standard floppy connector 34pin ====<pre>Internal floppy conntector CD201 to standard floppy connector 34pin===================================================================
(flat cable / crimp variant view)
Note: Disconnect wire 24-32 /S1 if there is no support by the operating system or if you want to use a side selector switch which is connected to the floppy drive.
CD201 PCF SIGNAL
03 NC
02 NC
01 NC</pre> === Issues ===<pre>Floppy drive issues===================This cables work for drive which are jumpered as drive 1 or DS1. This is normally the default selection on drive delivery. Also make sure you find a drive which has the possibility to generate a ready signal instead of a disc change signal.
</pre>
=== Issues ===
==== Floppy drive ====
<pre>Floppy drive issues
===================
* This cables work for drive which are jumpered as drive 1/DS1. This is normally the default selection on drive delivery.
* Make sure you find a drive which has the possibility to generate a ready signal instead of a disc change signal.
</pre>
==== Disk issues<br> ====
<pre>Disk issues
============
If you intend think about to use a HD drive, make sure to close the HD detection hole on your disk. </pre> [[Category:DIY]]
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