Re: Neat hack proposal for old machines...

Article View: comp.sys.sinclair

Article #42

#42

From: Bob Manners
Date: Thu, 08 Feb 1996 13:38

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   Bob Manners (rjm@swift.eng.ox.ac.uk) wrote:

     I think the ZX80/81/Spectrum used the same encoding.

   elliott@teaching.physics.ox.ac.uk  (John Elliott) writes:

     I'm sorry to say you're wrong. I've no idea what the ZX80 used,
   but the ZX81 uses something at about 250 baud, and the Spectrum runs 
   at about 1500 baud. The Spectrum system works by detecting the time 
   between voltage level changes, rather than the levels themselves. 


Wouldn't be the first time I was wrong! I thought the Speccy could
read ZX81 tapes? Maybe it has a backwards compatibility mode? Seems
unlikely for Sinclair to do this though ...

Cheers,
Bob.

--

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Robert Manners                                  Osney Laboratory
rjm@swift.eng.ox.ac.uk                          Dept of Engineering Science
                                                University of Oxford
                                                01865 288762
Computer Museum: http://swift.eng.ox.ac.uk/rjm/museum.html
Also:            http://swift.eng.ox.ac.uk

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From: rjm@swift.eng.ox.ac.uk (Bob Manners)
Newsgroups: comp.sys.sinclair,comp.sys.cbm,comp.sys.tandy,alt.folklore.computers
Subject: Re: Neat hack proposal for old machines...
Followup-To: comp.sys.sinclair,comp.sys.cbm,comp.sys.tandy,alt.folklore.computers
Date: 08 Feb 1996 13:38:27 GMT
Organization: Oxford University Engineering Department
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In-reply-to: elliott@teaching.physics.ox.ac.uk's message of 7 Feb 1996 20:19:59 GMT

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