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Old 20 January 2021, 11:54   #6
ex. demoscener "Bigmama"

Join Date: Jun 2012
Location: Fyn / Denmark
Posts: 1,229
Originally Posted by maaarcooose View Post
Also with the drive select 1,2 or 3, is there some logic that is needed at the drive end, so it responds to the select.
I also assume there is a specific way that the Amiga knows that there is another drive connected an what number it is.

Any light anyone can shed on this?

You need two things:
- The motor signal for the drive needs to be latched using e.g. a d-flipflop, latching the mtr line using the appropriate sel line.
- When the amiga is clocking the sel line with mtr deasserted, you need to clock out a pulse train on the rdy line - this is how the amiga detects if and what type of drive is connected.
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