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echo: power_bas
to: ERIC SCHONNING
from: WAYNE FOWLER
date: 1996-06-13 16:21:00
subject: Re: Parellel Port

ES> Sorry for delayed response, have been a bit busy....  You will need to
No worries. 
ES> make a special cable (or buy one) to send data between 2 computers via
ES> parallel port.  I checked the ms-dos 6.2 help for InterLink (the ms-dos
ES> "lan") and a cable with those pin connections would work fine. 
ES> Assuming you have that cable already, the code will have to send bytes
Yeah i already made it, and had a bit of a go myself, with some help from the 
sysop, but didn't really get it going. 
ES> 4 bits at a time, and then be re-assembled by the reciever.  The extra
ES> input/output is no doubt used as a handshaking line.  I will "wing"
ES> some code here, but cannot guarantee it will work.  The cable has data
ES> output bits D0-D4 going to status input bits S3-S7, respectively. 
ES> Assuming the D4 -> S7 bit will be used for the handshaking, the sending
ES> computer would do something like:
Oh, so yeah, ya use the staus register to get it..  I was trying to use the 
same address i sent it out.  LIke i have a interrupt list, and the status 
thingo, is at a different address  to the output one, i was tryin to get it 
in from tghe output one. hhe.  Stoopid me. :)
ES> hope it makes sense, as stated it is untested code but maybe you can
ES> get the idea of what I am saying.  Depending on your application, it
ES> may just be easier to use the serial port for data transfers between
ES> computers.  At least you can use the internal PB serial routines which
ES> work quite nicely....          Eric
ES> 
    Well, its made it a little but clearer on how it sorta works.  But to 
ell
ya the truth, its still over the top for me. heh.  I'l work her out. Yeah, .. 
Well, i would use the serial port but, they were being used.  Otherwise i 
would have used them, as they are HEAPS easier. ehhe :).   ThanX for ya help 
and the peice of source.  I'll try it when i get off here.. 
    CyA!  Wayne
--- GEcho 1.00
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