Re: It's fixed, Thanks

IRQ Vector Issue on the Non-Standard Port.  Tracked it down using the Oscope
and found NO Data was going out.

Thanks again for everyones help.

"Richard Skinner" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> I have a PC104 SBC that has onboard RS485 ports.  I previously wrote
> standard RS232 comm port routines to talk to devices on the rs485 network
by
> using a 232 > 485 convertor and everything worked great.  Now, however, I
> want to use the onboard 485 ports.  I have two questions....
>
> 1, my port is a 4 wire, my network is a 2 wire.  This is how I converted.
> +TX & +RX Tied together,  -TX & - RX Tied together.    The -TX & -RX hook
to
> A on the Network, and the +TX & + RX hook to B on the network.  Is this
> correct?
>
>
> 2.  In my standard Rs232 Routines, I modified to simply Raise RTS, wait 10
> ms, then then the string, wait 10ms, lower RTS.
>      I don't do anything special at all waiting on chars to arrive.
>
> Problem is, none of this works.  Any pointers?  I assume I can use the
> standard Serial Port Routines if I turn off  All flowcontrol and use the
RTS
> line right?
>
>
> I find tons of info on the difference in the specs, but not much about
> writing to the ports.
>
> Richard
>
>