Conference hydra::amiga_v1

   "DF1: BAD" is suspicious, since that is a floppy device designation.
    I believe you'll need to change your mountlist entry for the '23
    to something like DH1:. Just a guess ...
    

    I bought a Sony drive (720K IBM compatible drive) and got it to
    work by adding 3 chips for the "change" signal required by all
    Amigas.  I soldered the 3 chips one over the other to make it quite
    compact, but, basicaly it works OK.
    
    If you want the circuit,let me know. I can post it here.
    
    The only requirement is that the RX23 has a switch to detect
    the insert/removal of a floppy.  My Sony had one but I know 
    nothing about the RX23, does it?
    
    The 3 chips are standard SN74xx serie (inverter, flip-flop etc).
    
    Vince,

    RE .2
    
    If you could upload that circuit it would be much appreciated.
    
    
    Shaun.
    

    pg 27 of the May 1990 AmigaWorld has an ad from Applied Engineering
    
    AE 3.5 Drive is the first high density external disk drive for the
    Amiga.  It supports both standard 880K and 1.76 MEG 3.5" disks.  Housed
    in a thick, high impact, Amiga-beige ABS case, the drive incorporates
    the finest Sony drive mechanism available.  The AE 3.5 also supports
    1.44 high density MS-DOS disk and features electronic disk ejection. 
    $189.
    
    for info call (214) 241-6060, 9am-11pm, 7 days.
    
    
    The drive looks like an Apple external disk drive, with an eject button
    added (or do they come with that now?).  My suspicion is that they are
    describing what the drive can do, not what it can do when hooked to an
    Amiga.  Know of any Amiga that supports electronic disk ejection?
    
    Or maybe they figured a way past the problem with some sort of
    buffering scheme.
    
    -Dave

    
>mount 0 ohm resistors) and also the fact that the RX23
>do not use the normal power connector.  Anybody knows
>where the RX23 get it's power from? Must be some pins on 
>the 34 pin cable but how did you guys got it to work on 
>the amiga?
    
    The RX23 I have, has exactly the same power connector as the Chinon
    drive I replaced ! I had to put a single twist in both the power and
    the 34 way cables though i.e. the two connectors are mounted
    "underneath" the Chinon board and "on top" of the Sony.
    
    				Alan T.
    

    I assume that there must be many flavour of RX23 then.
    
    I looked at some 30-xxxxx class part number.  What is 
    the RX23 model you refer? It may be fun to have a look
    at that one, and compare with my 720K Sony the jumpers.
    
    Thanks in advance,  Vince.

    
\\\    I looked at some 30-xxxxx class part number.  What is 
\\\    the RX23 model you refer? It may be fun to have a look
\\\    at that one, and compare with my 720K Sony the jumpers.
    
I got the same problem with RX23 on Ami, the part# is RX23-A
Let us know....
Regards.
Luca

    I don't know what the DEC part number will be, but I'll take a note of
    the Sony part numbers off the drive.
    
    I had a real close look at it last night and there are dozens of
    jumpers all over the thing..... some are 'made' (with 0 ohm resistors)
    and some are 'open'. All appear to labeled RJnnn. There are too many to
    use trial and error, as I originally intended, so I must get a hold of
    the specs.
    
    				Alan T.
    

    The RX23 is definitely a Sony and is labeled MFD-17W-5GD
    
    				Alan T.