11 Aug
2019
11 Aug
'19
8:21 p.m.
On Sun, Aug 11, 2019 at 7:44 PM Chuck Guzis via cctech
<cctech at classiccmp.org> wrote:
On 8/11/19 6:00 PM, Douglas Taylor via cctech wrote:
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
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?