The use of 8880 to achieve DTMF communications and dial-up procedures.

8880
....\8880.c
....\8880.cof
....\8880.dbg
....\8880.dp2
....\8880.h
....\8880.hex
....\8880.lis
....\8880.lk
....\8880.lst
....\8880.mak
....\8880.mp
....\8880.o
....\8880.prj
....\8880.s
....\8880.SRC
....\8880._c
....\8880._h
....\8880_cof.aps
....\8880_cof.aws
....\main.c
....\main.dp2
....\main.h
....\main.lis
....\main.o
....\main.s
....\main._c
....\main._h
....\serial.c
....\serial.dp2
....\serial.h
....\serial.lis
....\serial.o
....\serial.s
....\serial._c
....\serial._h
....\shell.c
....\shell.dp2
....\shell.h
....\shell.lis
....\shell.o
....\shell.s
....\shell._c
....\shell._h
....\timer.c
....\timer.dp2
....\timer.h
....\timer.lis
....\timer.o
....\timer.s
....\timer._c
....\timer._h

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