THANK YOU! Ah, I searched for 74LS943 and it didn't show up as a modem chip... that's because the 74*HC*943 is the modem chip. There is no 74LS943...
Now I can delete it and get on with my video series. :) On Wed, Jan 10, 2024 at 11:14 PM Darren Clark <[email protected]> wrote: > It is a very basic 300 BAUD modem built into the case and wired up to > unused pins on the RS232 connector where a custom phone line adapter > plug would be used. > > The MN74HC943N is a 300 BAUD modem chip > https://www.digchip.com/datasheets/parts/datasheet/321/MM74HC943N.php > > The NM80C98N is a 3 state hex inverter > > > Darren Clark > > > On 1/10/24 20:05, David Plass wrote: > > Hi all, > > I just bought an NEC 8201 and it has a strange mod inside: there's a > > daughterboard on top of the motherboard with 5 or 6 alligator clips > > attached to various spots on the board including 3 or 4 on the RS-232 > > connector. > > > > For more details, I published a video to see what I'm talking about: > > https://www.youtube.com/watch?v=Q7G7Ozaf_mk > > > > Does anyone know what this is? > > > > -David > > >
