Re: Hardware-based vs software-based emulation

Date: Sat, 18 Feb 2017 09:38:37 +0100
Message-ID: <135235244.rRq33xPAXI@rakete>
On Saturday 18 February 2017, 08:24:26 smf <> wrote:
> On 17/02/2017 20:26, Gerrit Heitsch wrote:
> > That can be fixed by using a static RAM instead of DRAMs.
> It can be fixed by latching signals as well.
> My point is that a 100% VIC II in an FPGA would have the VSP problem, or
> it's not 100%. AFAIK vice doesn't have the VSP problem either.

actually x64sc can emulate it :) (its optional, "VSP Bug Emulation" in VICII 

and no, the problem can _not_ be fixed (only) by using SRAM - that was tried 
and proven wrong long ago. its an urban myth that doesn't want to die :) it 
might do the trick on a particular board, but then its just pure luck and 
replacing the DRAMs by other DRAMs with slightly different timing (eg from 
another vendor) might "fix" it just the same.


Ich ahne, wovon ich spreche, meine Damen und Herren. 
<Angela Merkel, CDU>

       Message was sent through the cbm-hackers mailing list
Received on 2017-02-18 09:00:38

Archive generated by hypermail 2.2.0.