[TUHS] DCJ-11 processor with 20k FPGA

[TUHS] DCJ-11 processor with 20k FPGA

[Jason Stevens via TUHS]

I assume people have seen this?

https://github.com/ryomuk/TangNanoDCJ11MEM/tree/main


It's capable of running Unix v1 & some limited amount of v6 among other
things.   The FPGA in question the Tang Nano 20k is sub 30GBP delivered from
AliExpress.

Kind of neat to combine a real processor with a simple FPGA implementation
of the hardware.

[TUHS] Re: DCJ-11 processor with 20k FPGA

[emanuel stiebler]

On 2025-03-01 07:11, Jason Stevens via TUHS wrote:
> I assume people have seen this?
> 
> https://github.com/ryomuk/TangNanoDCJ11MEM/tree/main
> 
> 
> It's capable of running Unix v1 & some limited amount of v6 among other
> things.   The FPGA in question the Tang Nano 20k is sub 30GBP delivered from
> AliExpress.
> 
> Kind of neat to combine a real processor with a simple FPGA implementation
> of the hardware.

I just had a look at it, but he doesn't show the code, which runs on the 
TangNano?

[TUHS] Re: DCJ-11 processor with 20k FPGA

[Sebastien F4GRX]

Hello,

Would that be it? 
https://github.com/ryomuk/TangNanoDCJ11MEM/tree/main/applications/unix-v1/TangNanoDCJ11MEM_project.20240729.beta/src

I have not found synthesis toolchain info. All the doc is written in 
japanese with no way to get proper english info except via ai translation.

Sebastien


On 05/03/2025 15:50, emanuel stiebler wrote:
> On 2025-03-01 07:11, Jason Stevens via TUHS wrote:
>> I assume people have seen this?
>>
>> https://github.com/ryomuk/TangNanoDCJ11MEM/tree/main
>>
>>
>> It's capable of running Unix v1 & some limited amount of v6 among other
>> things.   The FPGA in question the Tang Nano 20k is sub 30GBP 
>> delivered from
>> AliExpress.
>>
>> Kind of neat to combine a real processor with a simple FPGA 
>> implementation
>> of the hardware.
>
> I just had a look at it, but he doesn't show the code, which runs on 
> the TangNano?

[TUHS] Re: DCJ-11 processor with 20k FPGA

[emanuel stiebler]

On 2025-03-05 13:54, Jason Stevens wrote:
>   the code in the repo is for the FPGA, the processor that is strapped to the
> FPGA well it runs the real code.
> 
> It's like the 'minimig' Amiga emulator platform, a real processor, and FPGA
> to do all the IO heavy lifting.
> 
> So it's not 100% FPGA but you are executing code on a real processor so you
> aren't exactly full emulation either.  And it doesn't cost a fortune,
> assuming you can find one of these ancient microprocessors.

You are right, I just found it. Didn't expect the HDL code in the 
"applications" folder ...

[TUHS] Re: DCJ-11 processor with 20k FPGA

[Jason Stevens via TUHS]

 the code in the repo is for the FPGA, the processor that is strapped to the
FPGA well it runs the real code.

It's like the 'minimig' Amiga emulator platform, a real processor, and FPGA
to do all the IO heavy lifting.

So it's not 100% FPGA but you are executing code on a real processor so you
aren't exactly full emulation either.  And it doesn't cost a fortune,
assuming you can find one of these ancient microprocessors.



-----Original Message-----
From: emanuel stiebler
To: Jason Stevens; 'tuhs@tuhs.org'
Sent: 3/5/25 2:50 PM
Subject: Re: [TUHS] DCJ-11 processor with 20k FPGA

On 2025-03-01 07:11, Jason Stevens via TUHS wrote:
> I assume people have seen this?
> 
> https://github.com/ryomuk/TangNanoDCJ11MEM/tree/main
> 
> 
> It's capable of running Unix v1 & some limited amount of v6 among
other
> things.   The FPGA in question the Tang Nano 20k is sub 30GBP
delivered from
> AliExpress.
> 
> Kind of neat to combine a real processor with a simple FPGA
implementation
> of the hardware.

I just had a look at it, but he doesn't show the code, which runs on the

TangNano?