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by **kierenj** » Sun Jun 05, 2005 10:32 pm

Sounds like a really great idea. I've designed quite a few CPUs, at least on paper.. with weird things such as reprogrammable microcode, register paging / swapping, programmable logic algorithms, etc etc.. but all just ideas on paper and never made it into Verilog

Good on you...
I'd be really interested to see an assembly snippet or morsel of information? Got me curious!

Ta
Kieren

by **fpga4fun** » Mon Jun 06, 2005 2:18 am

I got Spoc HDL working a couple of weeks ago but then the first Xylo PCB came back from fab and I had to work on it...
I'm almost done so I should be able to publish more info on Spoc very soon.

by **kierenj** » Mon Jun 06, 2005 1:57 pm

Cool. Of course the obvious question is, what's Xylo?

by **fpga4fun** » Mon Jun 06, 2005 3:34 pm

See here
http://www.fpga4fun.com/board_Xylo.html

by **kierenj** » Mon Jun 06, 2005 4:13 pm

Crikey that looks good - VGA/ethernet a great idea.. combined with a soft core it's unstoppable

I want me one of those.

by **kierenj** » Mon Jun 20, 2005 7:10 am

Just read over the pages up so far.. very interesting ideas there w/persistant registers and the such. Is it a new idea?

by **fpga4fun** » Mon Jun 20, 2005 4:53 pm

not sure but that was fitting well with my architecture.

by **bluefox420** » Tue Jun 21, 2005 1:40 pm

SPOC is awesome .. I am eagerly awating the release of the verilog/vhdl code for the CPU

by **fpga4fun** » Tue Jun 21, 2005 9:18 pm

yes, looks like it turned out alright but we'll only know that there are no fatal flow in the design when it really gets used.
I had a few weeks of free time, so I was able to finalize and debug the design. The last piece that needs a little work is the assembler. I should be able to release everything soon - if life permits...

by **kierenj** » Fri Jun 24, 2005 11:42 pm

I'd like to plan to buy a Xylo, then use my Pluto-II as a logic analyser, for helping with the Xylo circuits. My old 'scope really isnt up to the job!
Xylo + SPOC + I2C EEPROM = sounds like a mini computer. Simple bootloader to transfer the EEPROM contents into RAM. Add VGA to that and you've got a little game system.. ha, perhaps

by **fpga4fun** » Sun Jun 26, 2005 8:12 pm

ok, I've released Spoc0 1.00 yesterday. Hopefully there aren't too many bugs left…

by **fpga4fun** » Sat Jul 16, 2005 12:35 am

10 minutes sounds about right

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SPOC

SPOC

SPOC rocks!