Teletype 43

Norman Jaffe turing at
Mon May 22 15:03:41 CDT 2017

I had an employee of an electronics store tell me that the IBM modem software on the 5.25" floppy for Windows would work fine on my Macintosh... in the days long before Macintosh systems used non-Motorola processors. 
That was a fun 'discussion'. 

From: "cctalk" <cctalk at> 
To: "Fred Cisin" <cisin at>, "cctalk" <cctalk at> 
Sent: Monday, May 22, 2017 12:57:52 PM 
Subject: Re: Teletype 43 

On Mon, 22 May 2017, Fred Cisin via cctalk wrote: 

> On Mon, 22 May 2017, Paul Koning via cctalk wrote: 
>> Does your PC have real RS232? A lot of "RS232" ports are serial ports, but 
>> not with correct RS232 levels. If you have "TTL RS232" [sic] it won't work 
>> with an actual RS232 port. 
> The "CLASSIC" example: manager of the Radio Shack Computer Center told me 
> that the TRS80 Model 1 Expansion Interface RS-232 board was, "by definition" 
> completely "standard" for RS-232, since "RS-232" stood for "RADIO SHACK 232". 
My jaw would not only have dropped at that statement, but it likely 
would've broken the hinge as well. 

It reminds me of the time a cow-orker went to the local Radio Shack 
looking for a GasFET and was told he'd have better luck at an auto parts 


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