On Sun, Aug 11, 2019 at 7:44 PM Chuck Guzis via cctech <cct...@classiccmp.org> wrote: > > On 8/11/19 6:00 PM, Douglas Taylor via cctech wrote: > > > I just looked at the TC02 and the Qualstar, there are termination > > resistor packs on each. The Qualstar has a bunch of 74LS240 IC's near > > the J1 and J2 pertec interface cables. The TC02 has a bunch of 74LS374 > > chips near the J1 and J2 connectors. > > > > This is where the electrical engineer could help. How do you determine > > how long a cable the 74LS240 can drive? > > TC02? The DECtape controller? >
I assume TC02 here refers to an Emulex TC02, a Q-Bus Pertec interface tape controller which emulates a TS11 tape controller. http://www.bitsavers.org/pdf/emulex/TC0251002-G_TC02tech_Jul85.pdf
