[comp.os.cpm] Null Modem Help

abodnar@APG-EMH5.APG.ARMY.MIL ("'Alex Bodnar Jr - abodnar@apg-emh5.army.mil'") (03/02/90)

hello all ....

    i guess its time i stop being a 'lurker' after seeing all
the good info thats come across the net....  and ask the experts
what i am doing wrong! i am trying to get to H89's (z80 cpu) to 
talk to each other. i first tried going rs-232 cables to a modem
on each machine then a direct phone connect cable instead of going
into the wall i went to the other modem with xmodem running on 
each machine. but i could not get the modems to "See" each other.
next step i tried to use a null modem cable going from one modem
port to the other. no luck there either. i guess this weekend ill
try a regular rs-232 cable from modem port to modem port and see 
if that will work. all the time i am using xmodem for software.
any and all assistance will be appreciated.
thank-you in advance
Alex Bodnar
Aberdeen Proving Ground, MD
Information Systems Command
KA3CIM

abodnar@APG-EMH5.APG.ARMY.MIL (Alex Bodnar, STEAP-IMD 5545) (03/10/90)

a big THANK-YOU for all the people who responded to my plea for assistance!

after getting one of those little rs232 testers from trash-shack i 
discovered that the magnolia cpm in this H89 switched the physical
ports with the port numbers in the software hense.....once i used a 
male 2 female converter and plugged in to the other port everything
is running great so far.

THANKX AGAIN


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Alex M. Bodnar Jr.   Amateur Radio - KA3CIM               PPSEL
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Information Systems Command
Systems Engineering Management Division
Aberdeen Proving Ground, MD
DSN 298-5545 Comm 1-301-278-5545
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