19 Feb
2017
19 Feb
'17
3:51 a.m.
On 17.02.2017 23:47, Charles Dickman wrote:
What I am wishing for are Omnibus and Unibus adapters to an FPGA.
I also thought about that. As a lab tool I'm totally fine with plugging
anything into my 8 or 11.
This could be done much easier for the Unibus than for Omnibus!
In fact I first thought about making a universal Omnibus interface.
Then I realized that it would have taken a massive amount of drivers and
receivers because every peripheral can use/manipulate so many signals on
the bus. And at that time I wanted to have
It's not address decoding and data lines, it's about data break, CPU
control lines and so on. The Omnibus contains much CPU-internal stuff
which *might* be usable or used for a certain interface board.
A peripheral board can force the CPU to continue at any address for
example...
The pdp8 external IO bus or the Unibus are more clear: You need this,
that and that. And that's it.