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 | Signal description connector | for standard floppy connector 34pin ----------+--------------------------------------------------- 1..33 | GND 2 | /DCD Disk Change Detect 4 | /DS4 Drive selct 4 (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 | 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
CPC-PL-9 (external floppy 34pin centronics connector)
CPC-PL-9 | Signal description external | for CPC external floppy 34 pin centronics connector | (numbering from Amstrads repair manual) ---------+-------------------------------------------------- 2..34 | GND 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
Wireing diagrams
External floppy connector CPC-PL-9 to standard floppy connector 34pin
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 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
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
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>