Changes

DIY:Floppy Drives

2,055 bytes added, 12:19, 20 December 2022
Fixed the Drive Select pin 4 description
=== Preface ===
This document shows pinning list, wireing 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<br> ===
==== Standard floppy connector 34pin<br> ====
{| class="wikitable"! Floppy<prebr>Floppy connector !!colspan="2"| Signal descriptionconnector | for standard floppy connector 34pin----------+--------------------------------------------------- | 1..33 || GND || Ground |-| 2 || /DS (density select 1=low desnity / 0=high densityDCD || Disk Change Detect|-| 4 | NC| /DS3 || Drive select 3 (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
| for CPC internal floppy 26 pin connector
| (numbering from Amstrads repair manual)
----------+---------------------------------------------------
1..25 | GND
2 | /IND index
4 | /DRV1 drive select 1
6 | NC
8 | /MED1 motor enable drive 1
10 | /DIR direction select
12 | /STEP head step
14 | /WDAT write data
16 | /WGAT write gate
18 | /TRK0 track 0
20 | /WPT write protect
22 | /RDAT read data
24 | /S1 side 1 select
26 | /RDY ready (or /DSKCHG) depending on model or drive configuration</pre>
<br>
{| class==== "wikitable"!CPC-PL-9 (external floopy 34pin centronics connector) CD201 !!colspan====<pre>CPC-PL-9 "2"| Signal description external | for CPC external floppy 34 pin centronics connector | <br>(numbering from Amstrads repair manual) ---------+-------------------------------------------------|- 2| 1..34 25 || GND33 | +5V31 | +5VGround29 | +5V-27 | 2 || /IND index|| Index25 | NC-23 | 4 || /DRV1 drive || Drive select 121 |-| 6 | +5V | NC19 |-| 8 || /MED1 motor || Motor enable drive 117 |-| 10 || /DIR direction || Direction select15 |-| 12 || /STEP head || Head step13 |-| 14 || /WDAT write || Write data11 |-| 16 || /WGAT write || Write gate|-| 9 18 || /TRK0 track || Track 0|-| 7 20 || /WPT write || Write protect|-| 5 22 || /RDAT read || Read data|-| 3 24 || /S1 side || Side 1 select|-| 1 26 || /RDY ready || Ready (or /DSKCHG) depending on model or drive configuration</pre> |} 
<br>
 
==== CPC-PL-9 (external floppy 34pin centronics connector) ====
 
{| class="wikitable"
! CPC-PL-9 !!colspan="2"| Signal description external<br>(numbering from Amstrads repair manual)
|-
| 2..34 || GND || Ground
|-
| 33 || +5V ||
|-
| 31 || +5V ||
|-
| 29 || +5V ||
|-
| 27 || /IND || Index
|-
| 25 || NC ||
|-
| 23 || /DRV1 || Drive select 1
|-
| 21 || +5V
|-
| 19 || /MED1 || Motor enable drive 1
|-
| 17 || /DIR || Direction select
|-
| 15 || /STEP || Head step
|-
| 13 || /WDAT || Write data
|-
| 11 || /WGAT || Write gate
|-
| 9 || /TRK0 || Track 0
|-
| 7 || /WPT || Write protect
|-
| 5 || /RDAT || Read data
|-
| 3 || /S1 || Side 1 select
|-
| 1 || /RDY || Ready (or /DSKCHG) depending on model or drive configuration
|}
 
<br>
=== Pinning translation between different connectors (CPC-PL-9, Centronics 36pin, Floppy connector 34pin)<br> ===
<br>
=== Wireing Wiring 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 you use a side selector switch which is connected to the floppy drive.
PL9 {| class="wikitable"!width="25%"| PL-9 !!width="25%"| CEN !!width="25%"| PCF !!width="25%"| SIGNAL|-| 01 || 36 || 34 || /RDY|-| 02 || 18 || 33 || GND|-| 03 || 35 || 32 || /S1|-| 04 || 17 || 31 || GND|-| 05 || 34 || 30 || /RDAT|-| 06 || 16 || 29 || GND|-| 07 || 33 || 28 || /WPT|-| 08 || 15 || 27 || GND|-| 09 || 32 || 26 || /TRK0|-| 10 || 14 || 25 || GND|-| 11 || 31 || 24 || /WGAT|-| 12 || 13 || 23 || GND|-| 13 || 30 || 22 || /WDAT|-| 14 || 12 || 21 || GND|-| 15 || 29 || 20 || /STEP|-| 16 || 10 || 19 || GND|-| 17 || 28 || 18 || /DIR|-| 18 || 10 || 17 || GND|-| 19 || 27 || 16 || /MED1|-| 20 || 09 || 15 || GND|-| 21 || 26 || 14 || NC|-| 22 || 08 || 13 || GND|-| 23 || 25 || 12 || /DRV1|-| 24 || 07 || 11 || GND|-| 25 || 24 || 10 || NC|-| 26 || 06 || 09 || GND|-| 27 || 23 || 08 || /IND|-| 28 || 05 || 07 || GND|-| 29 || 22 || 06 || NC|-| 30 || 04 || 05 || GND|-| 31 || 21 || 04 || NC|-| 32 || 03 || 03 || GND|-| 33 || 20 || 02 || NC|-| 34 || 02 || 01 || GND -|- | || 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[[Image:20110805068.jpg|thumb|right]]==================================================================
(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.
{| class="wikitable"!width="33%"| CD201 !!width="33%"| PCF !!width="33%"| 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|}
[[File:20110805068.jpg|200px|thumb|left|alt text]]
 
</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 think about to use a HD drive, make sure to close the HD detection hole on your disk. </pre>
 
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