xc8 wrote:forget 100% emulation of SID, as SID is a combo of analogue-digital circuits.
ericgus wrote:Pitty someone cant drop Jeri Ellsworth an email and ask her about SID in FPGA.. I'd say she is the definitive queen of c64 in FPGA. .. but she is busy with CastAR these days.
xc8 wrote:ericgus wrote:Pitty someone cant drop Jeri Ellsworth an email and ask her about SID in FPGA.. I'd say she is the definitive queen of c64 in FPGA. .. but she is busy with CastAR these days.
what FPGA? the first one (on c-one) was half-backed and definitely not contained SID emulation (SID socket on the machine), the second one (DTV) is ASIC (and closed source AFAIK)
Newsdee wrote:There is already a more advanced device than the C64DTV called the Turbo Chameleon 64 by Jens Schonfeld. I believe the MIST's c64 core is based off an older version of the TC64 core (which was open-source or at least gray area but available). The latest version of the TC64 isn't open but it has a very good SID implementation.
Perhaps now that the TC64 are out of stock they might consider opening the code, unless they're planning another run of it.
xc8 wrote:MiSTs core is based on fpga64 v27 (latest source available by Peter Wendrich) , there is a newer one -v29-, c-one only, there is not source code for this, but I think Peter can sell the code. I am using the TC64 core on the c-one, just for few games as the fpga64 has some freakin bugs (like the restore key is not working).
javidoom wrote:Mambrino tried too, to improve the 1541 disk drive compatibility (https://github.com/mist-devel/mist-binaries/issues/22)
sorgelig wrote:There is source code of 1541 Ultimate II on github with SID sources.
I didn't try to port that SID yet, although it's written that source cannot be used in other projects without explicit permission.
The code of SID is pretty large and may be has good emulation. VHDL is the biggest problem. Everything about C64 and SID is written in this ugly inconvenient language...
Is there any 1541UltimateII user around? Would be good to know about quality of SID before do anything.
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