> On 2018-03-15, at 18:02, Mia Magnusson <mia@plea.se> wrote: > >>> The 65xx SID has highly non-linear "opamps". The 85xx fixes that. >>> Not everyone likes it, of course. >> >> It fixes also the bad clicks during volume change for example. Or is >> it the side-effect of the above? > > Clicks when changing volume is due to DC present somewhere. It's > probably related but a different thing. The problem with this was that due to those fixes, 8580 didn't properly emulate 6581. For that reason, for several months after CBM introduced the narrow boards, I had a queue of people wanting their 8580 replaced with the real SID ;-) and couldn't source 6581s fast enough to satisfy the demand. >>> causing >>> the sparkles. A little cap (from CS to ground) solves this. There >>> is no difference between the 65xx and 85xx VIC here. >> >> Even sparking aside, the picture is noticeably different. I don't say >> "better" or "worse" but it is different. > > IMHO this is a problem with VICE. Iirc I've tried all settings and no > one looks like most real PAL C64/C128's do. My memory may be incorrect. VICE is a different thing, and as smf mentioned, a "100%" accurate emulation of all the analogue idiosyncrasies of various combinations of VIC/mainboard revisions is close to impossible. What we talked about are the perceivable differences of the hardware's output. The biggest one (we talk PAL) is between 6569R1 and the later revisions. The second biggest is between 6569R[2-4] and 8565 (was it? I dislike this VIC so much that I am not even sure if this is its proper number :-). The third is between the 6569R5 and 8565. If I didn't mix things up and differences inherent to various variants of the RF modulator aside. -- SD! - http://e4aws.silverdr.com/Received on 2018-03-15 22:00:01
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