Hi All

Today (10-Sep-2018) an updated release v1.52 of the r65c02_tc was uploaded to opencores.org repository.
State "RELEASE CANDIDATE" was changed to "READY - PRODUCTION".

Because of the missing feedback since 2014 all work around this core has been canceled.
With Dave's and Ed's very good help ...

The user want to keep his current platform and like it, I believe.

Hi Arlet

Thanks for the additional information.
I'm using PLL/DLL blocks in such cases. Using the additional registered data/address lines with doubled clock rate to achieve the max. clocking rate of my system on FPGA.
There are special considerations about clock domain crossing in such cases. Also ...

Hi enso

Ok, it's clear now what you mean. My last answer to you reflects only a part of the situation.

Simple as possible for me:
I only give the fmax of my cores for a specific technology without any attached devices. No more - no less. The rest is a job like a "FAE" (Field Application Engineer ...

You are welcome...
I got the chance to clarify some details and fact around my ideas...;-)

My English is a little bit poor. I hope I can clarify what I meant -> NO RAM:
The cpu core cpu65x02_tc itself uses no ram blocks to increase lock up internal hidden operations like other cores do. This mean ...

Hi Tor

And why do you bought this fine board? What of ideas at the beginning do you had?
It is too bad to have a CycloneII in a drawer only, I think too...

What is name of the threat you referenced for?

Cheers
Jens

Hi and thanks for your questions

-Will it work on a Xilinx?
YES - The core is independent of the FPGA vendor.

-When you talk about clock rates, do you use internal FPGA RAM? I've been working with Arlet's core which runs at 105MHz with internal RAM, but with a 10ns SRAM getting 50MHz was a bit ...

Thanks for reply and additional information!

I planned to investigate both main target technologies Xilinx and Altera. The most effort might be to held the collection/comparison up to date.
I also think, that older types of FPGA chips are interesting for most users today. Day by day new users ...

If anyone encounter in some trouble by running cpu6502_tc in the past, may be you'll find an answer after looking to the actual revision history:

-- (C) 2008 - 2013 Jens Gutschmidt
-- (email: scantara2003@yahoo.de)
--
-- Versions:
-- Revision 1.5 RC 2013/07/31 11:53:00 jens
-- - Bug Fix CMP (IND ...

Dear 65x02 fans

I don't want to bother you.
But I inform you that the release candidate of the 65c02 soft core processor cpu65c02_tc is available on request by any user.
Because of the original r65c02 requirements regarding "Unknown op codes as special NOP" there is a performance penalty of -10 ...

Hello Ed and Michael

Thanks for valuable and nice feedback.

It might be a heavy job to work on a new cross-reference. There are new 6502 soft core variants around with new capabilities and performance borders.
I found many Spartan3 projects on the web are still active. But found less based on ...

Dear 65x02 fans

I found this threat while searching for r65c02_tc related topics over the internet.
I'm Jens Gutschmidt, the developer of the r6502_tc and r65c02_tc IP core. Designed for FPGA solutions which have real time requirements for internal and external cycle relationship.
I'm also very ...