🚀 go-pugleaf

From article <billq.661025394@s.ms.uky.edu>, by billq@ms.uky.edu (fill in blank):
> I am playing with a simple ADC0804 A/D converter.  But I don't have much
> data about it. I have enough schematics to let me know what the pin outs
> are but thats it.  I am trying to use my PC(XT)'s paralle port to read the
> 8-bits information from the chip.  I have had some luck reading in from the
> OUTPUT lines on the parallel port (i.e. I am breaking some rules ... I guess?).
>
>     Billy Quinn (billq@ms.uky.edu)
>                 (pr01527@ukpr.uky.edu)
>                 (home phone: 606-233-1568)
	The original PC/XT and PC/AT had printer ports that were WRITE ONLY. you


couldn't read them. (The original designers thought that no one would want to
READ from a PRINTER.)

	The PS/2 series now has the bi-directional ports.

	some attachment cards that have a parrelell port (LPT1) have the ability
to read. Some of them merely read back the information that you just wrote to the
port.

	The moral of the story is that you shouldn't be too dissapointed if 
you cannot input from your printer port. If you are determined to do this then
you will need the schematic of the port from the manufacutrer of the LPT port.

-- 
That is all ...
Christopher J. Pikus,               Megatek Corp.
INTERNET:     cjp@megatek.uucp      San Diego, CA
UUCP:         uunet!megatek!cjp or ucsd!megatek!cjp