I have a very nice Calcomp Graphics tablet which runs on the ADB
connection to my Mac IIvx. Unfortunately I cannot find a way to move the
pad over to my present Win2K box. Any thoughts on how to run Apple
Desktop Bus units on either USB or RS232 connections? The tablet is
powered by the ADB but I could run from external power. It is rather
large with an 18x24 inch active area but I was creating architectural
drawings and topographic maps at the time. Saves on having to splice
drawings together inside Photoshop too. If anyone has any hints on how to
get it running on this modern boxes I am all ears.
Kevin. KD5ONS
On Tue, 22 Nov 2005 19:05:01 -0800, Jack Brindle
<[EMAIL PROTECTED]> wrote:
Let's not get into an argument on this... The latest spec is RS-232F, I
believe. It now contains definitions for the DB25 and RJ-45 connectors
and maybe a few others. At over $100 for the spec, I don't have a
strong desire to find out what else. Amazingly, it does not contain
definitions for the commonly-used DE9 connector.
In D-shell connectors, the second letter specifies the size of the
connector shell. There are many pinouts and arrangements used in B-
sized shells, including Sun's video connections. The 15 pin connector
uses an A shell, while the 9 an E shell. Now that we note this, I
seriously doubt that we have any chance of convincing the world to use
the correct nomenclature, are we...
And lastly, the Macintosh has never used RS-232 levels on its serial
ports. Instead, they (we for a while) used RS422 levels, centered
around zero volts. This allowed the creation of AppleTalk and its
predecessor, AppleBus. It also allowed interfacing to the outside world
and the commonly used RS-232 levels. All have now been phased out and
Apple uses Ethernet and USB on its systems.
OK, so now back to our regularly scheduled radio discussions... ;-)
:-) :-)
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