One chip MSX improvement project

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By caro

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15-10-2012, 21:28

@vanfanel: Try version from 15.10.12 http://caro.su/msx/ocm_de1.htm

By vanfanel

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15-10-2012, 23:18

@caro: ouch!! A new version and I'm out in the mountains, far from my Altera DE1!! I will test it when I go back to civilization!!

By x-nen Aivalahostia

Paragon (1484)

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16-10-2012, 10:06

@caro:I tried the latest version, and the bug sound in SCC carditges continues, The scc sounds but is "compressed" i'll record it, other bugs on real carditges:
-Palysiniq:every thing works but sega not.
-Nemesis 1, don't start (the rom image works fine)
-Melal gear, don't start (the rom image works fine)
-Game Master. don't start alone and with other konami.
-External floppy drive, don't work.
That isn't an importatnt bugs, all of the rest work's fine, tape imput and joystick ports ond many other carditges works fine( exept mouse port, i'll test it soon).
Thank you for your exellet works and time.

By vanfanel

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17-10-2012, 23:55

@caro: I finished testing core version 15.10.2012

Invasion Of The Zombie Monsters has the same audio problem; lost percussions on the intro scene.
I got to record the sound DIRECTLY from the DE1, so you can see what I mean:

Zombie Monsters BAD PSG: core 15.10.2012

This would be the correct audio with all percussion sounds in place:

Zombie Monsters CORRECT PSG audio

Now you can compare both audios directly and you can see that half of the percussions are lost in the 15.10.2012 core. They are lost since you fixed Eggerland standing tone :(

thanks!

By caro

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18-10-2012, 14:41

It would be not bad to hear as it sounds on natural 1ChipMSX

By KdL

Paragon (1436)

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18-10-2012, 15:41

By caro

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18-10-2012, 16:21

Thank you.

By vanfanel

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24-10-2012, 15:21

@caro: did you notice the missing percussions on the Altera DE1 vs natural 1ChipMSX? Does it sound different to you, too?

By caro

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26-10-2012, 03:04

It seems the case for additional filter before codec, without which it can not function properly. There is no time to deal with this.

By vanfanel

Champion (446)

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26-10-2012, 10:34

@caro: So, does the natural 1Chip MSX have this filter implemented, then?

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