Re: RS232 - built-in versus Interface 1

From	Russell Marks <zgedneil@spam^H^H^H^Hgmail.com>
Newsgroups	comp.sys.sinclair
Subject	Re: RS232 - built-in versus Interface 1
References	<3af4e4ae-3587-400c-8358-e1e38a83bcae@googlegroups.com> <E_htH.49936$zz79.40162@usenetxs.com> <10gh91uncbmkk.dlg@news.bartheld.net> <EjwtH.10590$oT47.7709@usenetxs.com> <1c0w91sg3z5mw$.dlg@news.bartheld.net>
Organization	this space intentionally left blank
Message-ID	<b2xtH.6833$Cp69.2319@usenetxs.com> (permalink)
Date	2020-11-19 16:27 +0000

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Volker Bartheld <news2020@bartheld.net> wrote:

> On Thu, 19 Nov 2020 15:38:12 GMT, Russell Marks wrote:
>> Volker Bartheld <news2020@bartheld.net> wrote:
>>> On Wed, 18 Nov 2020 23:20:04 GMT, Russell Marks wrote:
>>>> I seem to remember the IF1 port was very slow
>>> Well. The Z80 CPU runs at 3.5 MHz, there is no SIO available and the 16550
>>> UART (with FIFO) was born years after the Spectrum. In that light, serial
>>> communication via software...
>> To be fair, I don't think I ever used the IF1 port - it's just the
>> impression I had at the time. I could have phrased that better.
>
> Verdict: It's not USB3. Surprise, surprise. ;-)

...

Seriously?

-Rus.

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RS232 - built-in versus Interface 1 Lee Osborne <losborne74@gmail.com> - 2020-05-28 13:07 -0700
  Re: RS232 - built-in versus Interface 1 Russell Marks <zgedneil@spam^H^H^H^Hgmail.com> - 2020-11-18 23:20 +0000
    Re: RS232 - built-in versus Interface 1 Volker Bartheld <news2020@bartheld.net> - 2020-11-19 14:26 +0100
      Re: RS232 - built-in versus Interface 1 Russell Marks <zgedneil@spam^H^H^H^Hgmail.com> - 2020-11-19 15:38 +0000
        Re: RS232 - built-in versus Interface 1 Volker Bartheld <news2020@bartheld.net> - 2020-11-19 16:47 +0100
          Re: RS232 - built-in versus Interface 1 Russell Marks <zgedneil@spam^H^H^H^Hgmail.com> - 2020-11-19 16:27 +0000

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