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It should be possible to connect a RX33 to your ST if you take care
of some things: (as the Atari drives work with Shugart internally
as well as the RX33 as I was told by FS engineers)
- for a 1040 ST you only can use one of the drives as B:
- Atari has two drive select lines, you have to connect them in
the right order to the RX
- take care of the pullup resistors, you may have to change them
to another value in the RX, in some 5 1/4 '' drives the resistors
have a value the controller in the ST may not handle
- except the drive select lines you just have to connect the ribbon
cable in parallel to the ribbon cable inside a Atari drive.
- for MS-DOS floppies you have to change the step rate of the drive
by SW
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| If you are going to connect the RX33 to the ribbon cable inside drive A, you
can just connect the cable directly with no mods (ie: 1 for 1 connection) and
then move the drive select jumper on the RX33 over one position to configure
it as drive B (marked DS1 on the circuit board if I recall).
If instead you are going to make up a cable (edge connector to DIN connector)
to go from the RX33 to the floppy out connector on drive A (or floppy out on
the 1040 case), you should wire the drive select in the cable to connect to
drive select A on the DIN. This is because ST floppy drives take the drive
select B coming in and route it to drive select A going out. In this case you
can just leave the RX33 drive select jumper set for drive A (DS0).
Ray
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