3/17    Hi, I'm getting kind of desperate now. Here is the repost:
        Does anyone know where to obtain specification on PC serial port
        interface, for input AND output? More specifically, which TTL/CMOS
        serial decoder do I need to buy to do I/O for a typical 152 or EErobot
        project? THANKS!
        \_ Pins 2,3 for send/receive.  What more do you need?
           \_ yeah, knowing the port #'s and irq's isn't very
              useful.
                \_ IRQ 3 and 4, 2e8, 3e8, 2f8,3f8.  Anything else?
        \_ Try some sort of electronics hobbyist store.  Or ask your TA.
        \_ I remember finding this data on the web when doing my 150
           project.  Just hunt around for a little while.  It is out there.
                -aspo
        \_ When I took 150, the chip we used was made by Maxim. Why not
           check http://www.maxim-ic.com and look for datasheet on their
           interface chips?
          \_ Good advice, especially since the serial port uses some 12
             volt signaling, and you probably only want a 5/0/-5 volt
             power supply.  Maxim chips rock.  -Evil 150 head TA.