Are there any RC2014 Z8000 boards ?

[Peter Onion]

Topic adjacent I suppose, but I have 3 x Z8001 chips, and as a medium term project I want  to get one working on a RC2014 board.  Obviously it's also going to need the data/address bus demultiplexing and a 16 bit RAM board (no problem with extended bus) and to use some of the "user defined" pins for extra segment number address pins.   I could go to an 80 pin bus if required.

I've looked but I can find any evidence of anyone putting a Z8001 on a RC2014 board.

PeterO

[Tadeusz Pycio]

I am not familiar with such solutions and the RC2014 bus is not very suitable for this purpose. I once made an attempt to transfer the Z-BUS bus to RCBus, but the idea was abandoned due to the differences between the signals of these buses being too great. I already have a preliminary concept for implementing a Z-BUS bus, but this will not be compatible with the solutions offered by RCBus. The project assumes a PCB size of 100x100mm and the use of a DIN41612 64-pin AB connector. The advantage of this solution is the full implementation of the Z-BUS bus, which allows the use of virtually all combinations of the 16-bit Zilog environment. I assume that the simplest configurations with Z8002 and Z280 as well as maximum configurations with Z8001+MMU+DMA including coprocessors will be able to work here.

[Keith Howell]

Is the Z-bus defined anywhere?

A quick google threw up a load of irrelevant links.

[Tadeusz Pycio]

There is no clearly defined Z-BUS; there are only Zilog recommendations as to which signals should be included on it, without specifying a particular hardware solution. This was left to the designers of specific machines. The diagram I presented earlier also became outdated, which was a result of my progress in working on such a computer.If you would like to familiarise yourself with the outline of the requirements for such a bus, you will find more information in section 5-3: http://bitsavers.informatik.uni-stuttgart.de/components/zilog/1981_Zilog_Microprocessor_Applications_Reference_Book_Volume_1.pdf

[Robert Porter]

I think there is a Z50Bus iirc...  Doesn't (or didn't?) SCC have some boards on it?

On Wed, Aug 27, 2025 at 10:10 AM Tadeusz Pycio <ta...@wp.pl> wrote:

There is no clearly defined Z-BUS; there are only Zilog recommendations as to which signals should be included on it, without specifying a particular hardware solution. This was left to the designers of specific machines. The diagram I presented earlier also became outdated, which was a result of my progress in working on such a computer.If you would like to familiarise yourself with the outline of the requirements for such a bus, you will find more information in section 5-3: http://bitsavers.informatik.uni-stuttgart.de/components/zilog/1981_Zilog_Microprocessor_Applications_Reference_Book_Volume_1.pdf

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