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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

220.0. "Foreign floppies?" by CLOVAX::COBURN (John Coburn, Cleveland) Wed Dec 17 1986 11:04

I have been contemplating buying an Amiga (or an ST) and was wondering if
anyone has attempted to hook up the floppies that are used on the VT180? I
have a Robin now and would hate to junk the drives if I don't have to. 

Thanks for any information relating to interfacing external disk drives.

John.

PS - I am going to post a similar question to the ATARIST notes file

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220.1Unpaid EndorsementCHEF::ACCIARDIWed Dec 17 1986 12:4467
    The new version of AmigaDOS (V 1.2) has utilities and commands to
    configure virtually any floppy disk ever created into a usable device.
    
    Regarding your choice of purchase, I am admittedly a tad biased,
    but for just a little more money than the 1040 ST, the Amiga gives
    you:
    
    	* Real stereo output with 4 voices, A/D sound sampling capabilites,
    	  the sound has to be heard to be believed.  The ST provides
    	  a sound chip that is not quite as good as the C'64.  Granted,
    	  there is a MIDI port present, but it is not a great MIDI port,
    	  and an Amiga MIDI can be had from about 6 different vendors
    	  from $39.00 to $69.00.
    
    	* A color palette of 4,096 colors, and a zillion graphics modes,
          including 640 x 400 with 16 colors, and a HOLD_AND_MODIFY
    	  mode that allows all 4,096 colors on the screen at once in
    	  any of the resolution modes.  The Amiga also displays 32 colors
    	  in lo-res mode, vs the ST 16 colors from a palette of 512,
    	  and 16 colors in med-res (640 x 200) vs the STs 4 colors.
    
    	* Real multitasking, which has received rave reviews from everyone
    	  who has used it.  Great software really needs multitasking
    	  to run smoothly.
    
        * Built-in text-to-speech conversion.
    
    	* Command-driven operating system, with over 50 DOS commands,
    	  which is accessible from the Workbench (Icon-oriented)
          environment.
    
        * Works with virtually every kind of monitor or TV set ever
          created.
        
    	* Expansion bus, for connecting peripherals, extra memory, etc..
    
    	* 880 K floppys, vs 720 k on theh ST
    
    	* A real blitter chip, built in from day one.  (Atari has been
    	  announcing their blitter for over a year now).
    
    	* Cheap memory expansion boards are now available.  For example,
    	  2 Megs of fast RAM cost $525.00
    
    	* And on and on...
    
    My point is that Atari is trying to make the ST more Amiga-like
    with optional add-on Blitters and Sound cartridges.  Why bother?
    You can have it all right now.
    
    Also, the Amiga has outsold the ST in the USA (100,000 to 60,000).
    The ST still is more popular in Europe, where it was introduced
    about 9 months before the Amiga.  There are about equal amounts
    of software for each machine, but the Amiga has the ST clobbered
    in the graphics and sound areas.  The ST has better word-processing
    and business-type stuff for now.
    
    Couple of more points...Atari kinda left out some important parts
    of GEM on the ST, like GDOS, which they say will be available 'soon'.
    
    For a more professional (and admittedly biased) review of the strength
    and weakness of each machine, read the note called 'ST MYTHS' somewhere
    in this conference.
    
    All in all, neither Commodere or Atari has been very good at delivering
    on promises, but lots of people feel that the Amiga has the superior
    hardware today.
220.2interesting questionBAGELS::BRANNONDave BrannonWed Dec 17 1986 18:0931
    re:.0  why junk the VT180?  Hooking up the disks to the Amiga or
    ST require some hardware hacking.  Just run a null modem cable
    between the VT180 and your new computer whenever you need files
    off of a 5.25" disk.
    
    Can the Robin read MS-DOS 360K disks?
    
    The disk controller in the Amiga is mostly in a software driver
    that uses the blitter and general purpose hardware, in the ST it is
    a Western Digital chip.  Since both use industry standard disk drives
    the only real difference is the interface from the disk to the
    computer.  The Amiga uses a DB23 connector and the ST uses a DIN
    connector - both not carried by Radio Shack.  The DB23 can be made
    by cutting a DB25 down to that size.
    
    The new Wb 1.2 software on the Amiga allows you to tell the
    OS about a strange drive configuration - that makes the software
    side of hooking up the drive easier.  Depending on how strange
    the disk is, on the Amiga you could write your own disk controller.
    
    You need to know more about exactly what the vt180 drives need -
    can they be powered directly from an outlet or do they depend
    on the Vt100 for power?  Who is the manufacturer of the drive, etc.
    
    I'm real curious if it can be done.  I saw a dealer selling the
    drives for $100 at the computer show in Boxboro.  Very tempting if all
    it takes to hook it up is making a cable.
    
    -dave
    
                                                                       
220.3Din at RS, But Who Cares?DRUMS::FEHSKENSThu Dec 18 1986 11:256
    I have seen all forms (from 2 to 6 pins) of DIN connector at my
    local radio shack - is there some other kind of DIN connector?
    Not that it matters much, this being the *Amiga* conference.
    
    len.
    
220.4BAGELS::BRANNONDave BrannonThu Dec 18 1986 13:027
    its a lot more than 6 pins in that Din, don't remember the exact
    number.  I think its 13 pins, but the ST conference is a better place
    for that kind of info.  I only wanted to make the point that both
    computers use potentially hard to find connectors, and at least the
    Amiga DB23 could be made from a DB25 connector.
    
    -dave
220.5Here is what I knowCLOVAX::COBURNJohn Coburn, ClevelandFri Dec 19 1986 10:5517
    Re: < Note 220.2 by BAGELS::BRANNON "Dave Brannon" >
    
    Maybe junk was the wrong word. I have four floppies on the Robin that
    are externally powered (each pair plugs into 110v outlet). I would
    use 2 for CPM on the Robin and the other 2 for the other system.
    
    I don't believe the Robin can read the 360K RX50s. 
    
    I am not at home now but I believe that there is 2 different kinds of
    floppies that came with the Robin (I have both) and they are TEAC and
    Panasonic SS/DD for a total of 170K per drive. I don't have much
    technical info on the drives themselves put I think I can get some
    from other Robin owners within Digital. 
    
    BTW: The input on the drive cabinet is a DB25 connector. 
    
220.6..or what I didn't knowCLOVAX::COBURNJohn Coburn, ClevelandFri Dec 19 1986 11:286
    The VT180 used TEAC FD 50A and a Shugart (not Panasonic - where did I
    get that). Some more technical info can be found in BISON::VT180
    notefile.