<< Does anyone know how to get access to the COM1 port on the OGO? On a PC
normally COM1 is accessed by its device address at hex 03F8 interrupt 4,
but when I try any comm program on the OGO it crashes big time. Ive
tried a compiled QBASIC program, a small terminal program, a TSR COM
driver, and all react the same. As soon as the program attempts to open
the port, BOOM!. Yet the OGCOMM program works fine (of course). >>
OmniGo: Serial flow control
The only pins connected are
Tx (transmit)
Rx (receive)
RTS (request to send)
CTS (clear to send)
The following pins are not connected and can not be used for flow control
DTR (data terminal ready)
DSR (data set ready)
RI (ring)
CD (carrier detect)
DTR is wired to digitizer, messing with it will blank screen.
DSR is wired to the battery indicator.
On the OmniGo, the built-in serial port is COM 1 and the PCMCIA serial port
is COM 4.
Q. Can I use hardware flow control on the OmniGo?
A. Yes and no. Yes you can use RTS/CTS, but you cannot use DTR.
On the OmniGo, DTR is always high, but when the transceiver isn't powered on,
the external DTR pin isn't driven. Since the pin is floating, it will most
likely appear as neither HIGH nor LOW.
Steve