It may be of interest that the Outbound Model 125 reads and writes the Mac 800K format using a standard Citizen brand notebook floppy drive.
Of course there's a circuit board between the Citizen and the Outbound.
The main components on the circuit card are (IIRC):
WD 37C65
WD 92C32 (Digital Data Separator for floppies)
74LS624 (VCO)
XP9103 (digital potentiometer)
28C64
GAL16V8 (the part that holds me up cloning the thing)
and a few assorted 74 series logic chips.
Oh, yeah, and right at the input (host) end is an 85C30--makes me wonder what protocol the Outbound is using to talk to the thing.
One of these days I really need to whip up a schematic on this thing. It reads and writes 400K, 800K and 1.44MB format Mac floppies.
One kind of curious thing is that if my understanding is accurate, the 37C65 already has the functionality of the 92C32 built into it, so why the separate 92C32? I suspect that the VCO and the XP9103 are in some way used to control the motor speed of the floppy disk.
Other kind of interesting facts are that the Model 125 came out around 1990, uses the ROM of a Plus or SE and uses a standard IDE notebook drive (but only certain models). Arguably (or perhaps totally) the first Mac hardware to use an IDE drive.
Of course there's a circuit board between the Citizen and the Outbound.
The main components on the circuit card are (IIRC):
WD 37C65
WD 92C32 (Digital Data Separator for floppies)
74LS624 (VCO)
XP9103 (digital potentiometer)
28C64
GAL16V8 (the part that holds me up cloning the thing)
and a few assorted 74 series logic chips.
Oh, yeah, and right at the input (host) end is an 85C30--makes me wonder what protocol the Outbound is using to talk to the thing.
One of these days I really need to whip up a schematic on this thing. It reads and writes 400K, 800K and 1.44MB format Mac floppies.
One kind of curious thing is that if my understanding is accurate, the 37C65 already has the functionality of the 92C32 built into it, so why the separate 92C32? I suspect that the VCO and the XP9103 are in some way used to control the motor speed of the floppy disk.
Other kind of interesting facts are that the Model 125 came out around 1990, uses the ROM of a Plus or SE and uses a standard IDE notebook drive (but only certain models). Arguably (or perhaps totally) the first Mac hardware to use an IDE drive.