6.5.1 SCSI-Adaptor

Build your own SCSI-Adaptor Kable

Found a schematic to build your own 50 Pin SCSI to DB25 SCSI Adaptor.
All technical Data are found in the Service Manuals and in a Book named: 'How to upgrade and repair a PC'

Use that adaptor to connect a ZIP device after the internal SCSI Device of a C-LAB Machine. Do not connect anything to the external SCSI2 Connector of your Falcon C-LAB Case. SCSI can't work with a Bus in a 'Y' Form.

All SCSI Devices must be shown as one Line from Falcon to your last SCSI Device. Do not connect anything in a 'Y' Junction to yor Falcon!

Picture 1 - Wireing of a 50 to 25 SCSI Adaptor First

Do not build that SCSI Adaptor with a single GND wire from Plug to Plug!
Use ALL GND wires of the 50 Pin Plug! Split these wires to GND Pin of DB25
The only way to safe your data!

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   *         Do not connect unsigned pins to somewere          *
   *     Do not connect anyhing to open pins at your device    *
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Picture 2 - SCSI2 to DB25 Adaptor

Picture 3 - Schematic of a 50 pin Flatcable

SCSI 2.5" Pinout

Here is the pinout of a 2.5" HD device. If you need to connect a kind of that device outside of a notebook, so you can build your own SCSI 2.5" to 50 Pin SCSI adaptor
Also you can take this adaptor from some computer shops

Pin 1,2: +5 V logic supply
Pin 3,4,5: Logic return / GND
Pin 6: /Data 0
Pin 7,9,11,13,15,19,21,23,27,31: GND ? (I'm not sure by all pin!)
Pin 8: /Data 1
Pin 10: /Data 2
Pin 12: /Data 3
Pin 14: /Data 4
Pin 16: /Data 5
Pin 17: Key (n.c.)
Pin 18: /Data 6
Pin 20: /Data 7
Pin 22: /Parity Bit
Pin 24: Term_Pwr
Pin 25: /ATN
Pin 26: /BSY
Pin 28: /ACK
Pin 29: /RST
Pin 30: /MSG
Pin 32: /SEL
Pin 33: /I/O
Pin 34: /C/D
Pin 35,37,38: GND, 37,38 GND (Motor return)
Pin36: /REQ
Pin 39,40: +5 V motor supply

Use this pinout to you own risk!