hbg6@citek.mcdphx.mot.com (01/22/91)
I currently am working on a personal project where I need my XT to receive DTMF (touch tone). I have the circuit working fine feeding the parallel printer port but I really want to put the decoder on the bus. I have a few full length proto-boards but they do not have the interface circuitry ( just a jillion holes ). Could someone please give me a pointer to a source for an 8 bit bus interface schematic ( or any other good ideas ). Thanks in advance, John ..................................................................... reply to 'from' address; hbg6@citek.mcdphx.mot.com NOT the 'sender' line address! Someday my sysadm will decide this is a 'real' problem. :-) ..................................................................... All opinions expressed are mine and not Motorolas, their loss. .....................................................................
jon_sree@world.std.com (Jon Sreekanth) (01/22/91)
In article <14446@mcdphx.phx.mcd.mot.com> hbg6@citek.mcdphx.mot.com writes:
the parallel printer port but I really want to put the decoder on
the bus. I have a few full length proto-boards but they do not have
the interface circuitry ( just a jillion holes ).
If you're using wire wrapped proto boards, JDR 800-538-5000 sells
wirewrap cards with the layout for address decoder circuitry. If you
buy the card without any decoder (which is what I do), they have
a slim help manual, which shows a lot of nice interface schematics.
If you're interested, email me your US mail address, and I'll send
you a copy, or if you're in a hurry, I can fax the stuff.
Regards,
/ Jon Sreekanth
Assabet Valley Microsystems Fax and PC products
346 Lincoln St #722, Marlboro, MA 01752 508-562-0722
jon_sree@world.std.com