Make up a positive bus interface and a DMA (data
break) card.
Which is nice. But what does this get me in the real world?
I believe they are required to support the DECTape interface but Eric Smith
would know for sure.
Yes, the positive bus interface is useful for hooking up any number
of PDP-8 postive bus devices (which are daisy-chained). You can also
add a positive-to-negative bus converter (DW08?) at the end of the
positive bus chain if you need to hook up older negative bus devices.
For each PDP-8 positive bus device that needs data break, such as a
TC08-P DECtape control, you need one data break interface card in the 8/e;
the data break cables are radial rather than daisy-chain.
If you don't have any older (non-Omnibus) PDP-8 peripherals, those
cards won't do you much good, so the only sensible thing to do would be
to give, trade, or sell them to Chuck or to me. :-)
