In SX Microcontrollers, SX/B Compiler and SX-Key Tool, John Bond wrote:

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">Hi Guys<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"> <o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">Has anyone got the code for a Parallel to serial converter?<o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p> </o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">We want to run a serial printer off a parallel port.<o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"> <o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">We have some old test equipment in our factory that uses Centronics parallel printer ports, unfortunately, we have standardized on (equally old) serial label printers. One used to be able to buy a converter but everything is USB there days and the "Western disposal culture" dictated that we just chuck perfectly good stuff away because it doesn't have a USB V2.0 sticker on it. Someone has just caught up with me on the shop floor and said "Bond, you're into electronics, why not just make a parallel to serial converter?" Well.<o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p> </o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">The circuit can't be too difficult, but the software frightens me. How do you handle flow control, what about the roughly 10 parallel lines that seem to go the wrong way, from printer to computer?<o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p> </o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">An intriguing problem, any comments would be welcome.<o:p></o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p> </o:p>

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">From South Africans where we communicate in 11 different official languages. Parallel to Serial must be easier than that.

<SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">John Bond<o:p></o:p>

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