I have a 68010 based Heurikon HK68/M10-5 Multibus CPU board. Does anyone know where to find the Heurikon UNIX . This board came with MC68451 and MC68450. I have installed a RTC so this board is ready for UNIX.
I have tried both KiCad and Eagle but none of them can open the *.sch file. I don't have OrCAD to try so I am not able to see the *.sch file. How was the original *.sch file created ?
I asked AI. Below is the answer from OpenAI...
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## Bing
Yes, QBus requires bus terminator. The backplane in the BA23 chassis (H9278A) has four onboard socketed resistor packs for termination, so a separate terminator board is not required.
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I have made a simple terminator. As soon as I have...
I will make a simple small PCB populated with 180ohms and 390ohm resistors as shown in the pdf file. I plan to place the PCB on the back side of the backplane with the help of the wire wrap pins.
It seems no termination is required for C and D slots ??? Can I add terminators to both AB and CD.
I suspect that my 9-slot backplane needs termination to be inserted in slot #9. There are no resistors or sockets for resistors on my backplane. Can someone confirm that the termination is an important configuration ? If the termination is required, where to find schematics to manually add...
jack, private/direct email sent. I am so lucky to have valuable comments from PDP-11 experts and experienced PDP-11 users
who quickly bring me to PDP-11 world. All my hardware components were obtained form the eBay with the cheapest prices.
The learning path for me is very long but successful...