Realfun 3

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By Grauw

Ascended (9379)

Grauw's picture

22-10-2020, 10:57

There are different variations of the SN76489 which amongst others have differrent noise patterns. Franky uses the Sega VDP whilst MMM uses the original SN76489. Also the treatment of period 0 values differs.

By mth

Champion (496)

mth's picture

22-10-2020, 16:18

I don't have any experience with real-life ColecoVision or MMM; I implemented everything using only tech docs. If you can point to some clear examples of dissimilarity, I can have a look at either fixing bugs or making the different variations of the chip selectable from the hardware description XML.

It would have to be dissimilarity in the digital output though; if it's analog filtering causing the differences then that's outside my area of expertise.

By GhostwriterP

Hero (551)

GhostwriterP's picture

22-10-2020, 17:30

knm1983 wrote:

A small detail, when I access the music loader, the background image of the tracker is still active and the file browser is mixed with the tracker.

This is probably due to that I use LMMV on the name table to clear the screen, which works apparently different than I assumed, which also means emulation needs to be looked at Wink. I guess I will change it to the conventional way for now.

Quote:

Out of curiosity, why do you call it "trial"? Will it be for sale later on or something?

I called it trial, for you guys to play around with. I have no intent to sell it, unless you prepared to offer a lot of money for it Smile .

By GhostwriterP

Hero (551)

GhostwriterP's picture

25-10-2020, 12:29

Few minor updates:

  • added 50 Hz equalizer (toggle with ctrl+f)
  • changed the clear screen routine (should now also work on real V9990).

Also I had a second go at metal squad song, still more like heavy synth instead of guitar sound, but getting closer Wink

The updated zip file can be downloaded with the same adress (www.xl2s.tk/realfun3trial.zip) or link

By Pac

Guardian (5918)

Pac's picture

26-10-2020, 19:41

Thank you! I tried to contact you through your email but it was refused. Then I wrote to the one is shown on the XL2S website and no problem. Are you still using that address too?

By GhostwriterP

Hero (551)

GhostwriterP's picture

26-10-2020, 22:08

Yes, the email reached me in the end.

By Manuel

Ascended (17063)

Manuel's picture

26-10-2020, 22:24

GhostwriterP wrote:

This is probably due to that I use LMMV on the name table to clear the screen, which works apparently different than I assumed, which also means emulation needs to be looked at Wink.

When you have the time, please make a ticket with a showcase and what it should do instead (or a patch Smile).

By GhostwriterP

Hero (551)

GhostwriterP's picture

28-10-2020, 18:27

It is not high on my to do list.
In P1 it is possible because all vram is interleaved, i.e. both PGT and PNT areas. In P2 PGT is interleaved but the PNT & SPAT is suddenly not interleaved anymore, which could be causing the problems.

By knm1983

Champion (510)

knm1983's picture

28-10-2020, 21:52

Now work ok for me with real V9990 with clear screen routine, and the new last music is spectacular Wink Wink

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