5 Jun
2012
5 Jun
'12
12:03 p.m.
On 4 Jun 2012 at 20:51, Tony Duell wrote:
I am pretty sure the Epson drive does have an ST412 interface. The one is
the siaze of a helaf-height 5.25" floppy and has 34 pi nand 20 pin card
edges and a normal 4 pin power connector. It's in a case (similar to the
case of a TF20 -- the floppy drive for the HX20) with a PSU and a
controller board. This has what looks to be a custom parallel interfce to
the host, and contains a processor (Z80 IIRC), ROM, RAM, etc, an NEC hard
disk cotnrolelr IC and what I'd expect foran ST412 interface.
The drive its;ef has a very wel-packed PCB with some custom ICs in PGA
packages. Due to the amount of custom silicon o nthat board, I can't
comment on things like whether it uses an embedded servo. If it does, it
must micro-step the positioned motor.
I think the whole unit is a BN-5, but I might be mis-remembering it.
-tony
I've come across an Epson 5.25" floppy
drive with an ST412-like
interface. Apparently it gets about 5MBytes o na disk. I don;t think
it was servotracked (the positioner is a nromal stepper motor) and I
think the heads are in contact with the media when it's in use. Anyone
know anything about it?
No, I don't think I've seen one. But the Drivetek 320 drives had two
edge connectors--one 34-position, the other 8-position, in an
arrangement such that you could make contact with both using a 50
position edge connector.