On 2023-01-30 1:50 p.m., Paul Berger via cctalk wrote:
On 2023-01-30 2:12 p.m., Fred Cisin via cctalk wrote:
The 5150 had a cassette port!
. . . The 5160 no longer had the cassette port.
On Mon, 30 Jan 2023, Paul Berger via cctalk wrote:
The cassette port on the 5150 could also be used as a
Telecommunication Device for the Deaf (TDD) many years ago I made up
a ISA bus card with the same function as the cassette port for a
gentleman that wanted to move on from a 5150 but still needed the
cassette port for a TDD device.
Interesting!
Was that stand-alone and compatible with the ordinary TDD/TTY units?
(and coupled to a modem)
Or was that solely for communicating with other 5150s?
Or was that to use the 5150 as a KSR terminal for a TDD/TTY handling
the POT communication?
--
Grumpy Ol' Fred [email protected]
I don't recall all the details but I seem to recall that the cassette
interface was used to generate the modem tones and would be connected to
an acoustic coupler. I believe the software emulated a TDD/TTY but I
don't recall if it was Baudot or ACSII. It would not have been a stretch
to do it all in software as the rate is only 45 Baud and the tone
generation for the cassette interface was done in software.
Paul.
RTTY software might do that.
Ben.
