Difference between revisions of "DIY:Floppy Drives"
From CPCWiki - THE Amstrad CPC encyclopedia!
(Table formatting for the pin translation tables) |
(Fixed the Drive Select pin 4 description) |
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| 2 || /DCD || Disk Change Detect | | 2 || /DCD || Disk Change Detect | ||
|- | |- | ||
| − | | 4 || / | + | | 4 || /DS3 || Drive select 3 (Not always supported) |
|- | |- | ||
| 6 || /INUSE || Open collector LED driver | | 6 || /INUSE || Open collector LED driver | ||
Latest revision as of 07:19, 20 December 2022
Contents
Preface
This document shows pinning list, wiring diagrams and signal descriptions found on a CPC6128.
Multi-Adaptor Cable for External Floppies / HxC emulator
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.
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:
Signal assignment on connectors
Standard floppy connector 34pin
| Floppy connector |
Signal description | |
|---|---|---|
| 1..33 | GND | Ground |
| 2 | /DCD | Disk Change Detect |
| 4 | /DS3 | Drive select 3 (Not always supported) |
| 6 | /INUSE | Open collector LED driver |
| 8 | /IND | Index |
| 10 | /DS0 | Drive select 0 |
| 12 | /DS1 | Drive select 1 |
| 14 | /DS2 | Drive select 2 |
| 16 | /MTRON | Motor enable |
| 18 | /DIR | Direction select |
| 20 | /STEP | Head step |
| 22 | /WDAT | Write data |
| 24 | /WGAT | Write gate |
| 26 | /TRK0 | Track 0 |
| 28 | /WPT | Write protect |
| 30 | /RDAT | Read data |
| 32 | /S1 | Side select |
| 34 | /RDY | Ready/Disk change depending on drive configuration |
CPC-CD201 (internal floppy 26pin connector)
| CPC-CD201 | Signal description (numbering from Amstrads repair manual) | |
|---|---|---|
| 1..25 | GND | Ground |
| 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 |
CPC-PL-9 (external floppy 34pin centronics connector)
| CPC-PL-9 | Signal description external (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 |
Pinning translation between different connectors (CPC-PL-9, Centronics 36pin, Floppy connector 34pin)
Translation from CPC-PL-9 via Centronics 36 pin connector to floppy connector 34pin
===================================================================================
(flat cable / crimp variant view)
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---- GND
| | | | | | | | | | | | | | | | |
Floppy connector 34pin 33 31 29 27 25 23 21 19 17 15 13 11 09 07 05 03 01 NC
Centronics 36pin 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
Amstard CPC-PL-9 02 04 06 08 10 12 14 16 18 20 22 24 26 28 30 32 34 NC
**++**++**++**++**++**++**++**++**++**++**++**++**++**++**++**++**++**++
Amstard CPC-PL-9 01 03 05 07 09 11 13 15 17 19 21 23 25 27 29 31 33 NC
Centronics 36pin 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
Floppy connector 34pin 34 32 30 28 26 24 22 20 18 16 14 12 10 08 06 04 02 NC
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | +-- NC
| | | | | | | | | | | | | | | | +------ +5V
| | | | | | | | | | | | | | | +---------- +5V
| | | | | | | | | | | | | | +-------------- +5V
| | | | | | | | | | | | | +------------------ /IND
| | | | | | | | | | | | +---------------------- NC
| | | | | | | | | | | +-------------------------- /DRV1
| | | | | | | | | | +------------------------------ +5V
| | | | | | | | | +---------------------------------- /MED1
| | | | | | | | +-------------------------------------- /DIR
| | | | | | | +------------------------------------------ /STEP
| | | | | | +---------------------------------------------- /WDAT
| | | | | +-------------------------------------------------- /WGAT
| | | | +------------------------------------------------------ /TRK0
| | | +---------------------------------------------------------- /WPT
| | +-------------------------------------------------------------- /RDAT
| +------------------------------------------------------------------ /S1
+---------------------------------------------------------------------- /RDY
**/++ Flatcable signal
Wiring diagrams
External floppy connector CPC-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.
| PL-9 | CEN | PCF | 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 |
Internal floppy connector 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 |
Issues
Floppy drive
- 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.
Disk issues
If you think about to use a HD drive, make sure to close the HD detection hole on your disk. </pre>
