DGH103@PSUVM.BITNET (12/12/89)
Ok, I don't think that I explained myself very well the last time I posted this
message. I will try to explain it better this time. I have a Tandy 1400LT and
for some reason they have the modem and the com port attached together,
consequently I cannot use the modem and the mouse at the same time, but that's
not the problem. What I want to do is write a program that I will run when I am
going to use ProComm that will switch from the com port to the modem. I have
the service manual for the 1400 and I am a little lost. I will show how thw pag
e looks:
I/O Address Map
System Status Register
Address Bit Contents Control
(Write Register)
0FCH 2 Modem/RS-232C Switch 1/Modem,0/RS-232C
I guess I should explain that to switch between them now I have to use the
CTRL-ALT-INS key sequence to get to a setup menu then switch to the one I want.
Can anyone help me? Any help would really be appreciated!!
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* Darryl G. Hickson Penn State University *
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*************************************************************************jmv@sppy00.UUCP (Jim Vickroy) (12/13/89)
In article <89346.001555DGH103@PSUVM.BITNET> DGH103@PSUVM.BITNET writes: =>not the problem. What I want to do is write a program that I will run when I am =>going to use ProComm that will switch from the com port to the modem. I have => I/O Address Map =>System Status Register => => Address Bit Contents Control => =>(Write Register) => 0FCH 2 Modem/RS-232C Switch 1/Modem,0/RS-232C => =>Can anyone help me? Any help would really be appreciated!! => From the "man" page you included above it looks like you need to tweek port 0FCH to switch to either the modem or the RS232 port. Try this: ; ; Switch to modem ; IN AL,0FCH OR AL,02H OUT 0FCH,AL ; ; Switch to RS232 ; IN AL,0FCH AND AL,0FDH OUT 0FCH,AL Now you'll have to build the rest of the logic around these segments. The same could easily be done in 'C'. jim -- ============================================================================== :::: ::: :: :: : : Jim Vickroy |OC| ||| || || | | Telecommunications Systems Engineering |LC| ||| || || | | Online Computer Library Center, Inc. :::: ::: :: :: : : Dublin, Ohio ------------------------------------------------------------------------------ Internet: jmv@rsch.oclc.org UUCP: {att|pyramid|killer}!osu-cis!sppy00!jmv domain: jmv@sppy00.uucp USSNAIL: 6565 Frantz Rd., Dublin, Ohio 43017-0702 ------------------------------------------------------------------------------ "Why turn a perfectly good frog into a prince?" -Pogo ==============================================================================
JGROVER@MAINE.BITNET (John Grover) (12/16/89)
I think Jim Vickroy is on the right track except the register is write only -- so we need to find a way to read the current status before writing to the register. Otherwise, we don't know what value to write to the register. John Grover University of Maine Computing Center