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 HP 9123 dual floppy

HP 9123 3 1/2" dual floppy

The 9123 is designed for use with the HP150-II touchsceen computer, and takes its power from that machine's PSU.
It is otherwise logically similar (same disk format, same commands) as the HP9122 drive, although it's electronically rather different. If you can use the 9122 then you can probably use the 9123.
The unit takes +12V and +5V power line. The pinout of the DIN plug (pins numbered conventionally, 1 4 2 5 3 ) is :

Pin Function
1 +5V
2 Gnd
3 Gnd
4 +12V
5 +5V

 

 

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