Re: The Postscript option and AppleTalk? (Re: parallel card)

[supertimer@aol.com (Supertimer)]

CUTblakeney@home.com (Jeff Blakeney) wrote:

>supertimer@aol.com (Supertimer) wrote:
>
>>Apparently, your printer is a very good model that has
>>AppleTalk built in.  Since the IIGS also has AppleTalk
>>built in, this is good because the two can then
>>communicate at 230000!  No need for a parallel card
>>on THIS printer.  ;-)
>
>As far as I know, a parallel connection can still go faster than
>AppleTalk.  230,400 bits/second = 28,800 bytes/second (not counting
>start and stop bits because it is a synchronous connection) so the
>parallel connection just has to have a bit rate of 28,800 bits/second
>but as it is sending 8 bits at a time that equals 28,800 bytes/second.
>Anything faster than that, 38,400 bps or 57,600 bps bit rate means
>that the parallel connection will be going faster than the AppleTalk
>connection.

You are correct, but AppleTalk is usually paired with
Postscript.  Since the printer does all the rendering,
the printer's speed is the limiting factor in both parallel
and AppleTalk.  No Postscript printer that I know of
can outrun AppleTalk, so there's really no need for
a parallel card on Postscript laser printers that support
AppleTalk.