Re: Reversing the Disney Sound Source

Posted on 2015-02-12, 10:20

by

by shock__

in Marvin \ Sound

in Marvin \ Sound

Thanks :) Going with a MCU might actually be a better approach, considering the 74ALS232 bills in at $5-$9 each these days making the clone as it is not very cost effective. Seeing how i.e. the ATMega8 costs ~$2 and supports 2x8bit I/O along with various control pins it might probably be a better …

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Re: Covox Sound Master Reverse Engineering / Replica

Posted on 2015-02-12, 08:26

by

by shock__

in Marvin \ Sound

in Marvin \ Sound

Well, even with all traces redrawn it would be a useless effort if you can't figure out the GAL (and a full scheme/wiring for it may not be very conclusive at all).

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Re: Covox Sound Master Reverse Engineering / Replica

Posted on 2015-02-11, 17:41

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Nice effort! Don't expect too much tho, I managed to find the guy who designed the SSI-2001 who actually promised me schemes & docs ... and possibly a card. After a year of "I didn't get to check yet" I stopped asking. That was a bit less than 4 years ago.

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Re: Reversing the Disney Sound Source

Posted on 2015-02-11, 16:37

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Good news everyone! After changing the LPT ports adress to a more standard one (0x378 instead of 0x3bc) and changing the mode from "bi-directional" to EPP - I can now confirm the sound in Wolf3d as working :) Guten Tag! NiteRaid & Duke3D (which actually does quite a lot [mixing various channels, …

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Re: Reversing the Disney Sound Source

Posted on 2015-02-11, 14:58

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Got the missing parts today, wired up a hastly prototype on breadboard, adjusted the variable resistor by some guesswork (was too lazy/excited to measure) and on the second try ... SUCCESS http://i.imgur.com/rsttAeY.jpg Now off to wire the actual data lines and the connector to the Covox. (yes, …

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-11, 07:02

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Yup, they're from SLY. I even picked up some more (11 in total - 8 going to Fagear) - all working perfectly (after I figured out the original sockets in my C64 are the worst, cheap crap ever) - they still have a considerable amount left. So there shouldn't be a shortpass anytime soon. The datecode …

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-10, 19:39

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Candytime? Candytime! (warning: 500kb jpeg) http://i.imgur.com/DIBja0I.jpg Shipping off to Fagear in the next days.

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-10, 08:37

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by shock__

in Marvin \ Sound

in Marvin \ Sound

I did a little thinking, couldnt have capacitance choosing for either chip be done with a simple dipswitch, or jumper? I tihnk that would be more modular than fixing the card to one chip. Like I said ... just add sockets, that way switching caps is as easy as switching jumpers ... except that you'd …

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-09, 22:41

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by shock__

in Marvin \ Sound

in Marvin \ Sound

If all else fails, wouldn't it be an option to create "sid dumps" (being just basic timing info and sid data) from .sid files, so you'd just have to send data to the ports on the card, rather than emulating a whole c64 enviroment at the same time. Certainly not very elegant, but that way no one …

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-09, 22:10

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by shock__

in Marvin \ Sound

in Marvin \ Sound

I used to frequent #c-64 on ircnet ... maybe they know where to point me for obtaining source codes for the hardsid programs/drivers (which could then be adapted).

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Re: Reversing the Disney Sound Source

Posted on 2015-02-09, 21:02

by

by shock__

in Marvin \ Sound

in Marvin \ Sound

Still waiting for the parts to arrive (pre-ordering for pickup seemed to have been a stupid choice) But I got bored today, enjoy an awesome 90s rendering of the emulator and a covox plug rotating ... in Dolby GIF (where available - warning 2MB file) http://i.imgur.com/8tfrQQ0.gif

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-09, 19:18

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by shock__

in Marvin \ Sound

in Marvin \ Sound

is it a good idea to fix a heatsink on the SID? If I remember correctly I saw some users doing that on their C64s... It certainly doesn't harm. Even though it's probably not the cure of all problems either. It probably has a slight positive effect on long term usage as lower heat means lower stress …

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-09, 18:33

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Another tip: Make sure to only touch the plastic/ceramic of the chip, not the pins itself whenever possible. In any case, even that may not help. I just picked up 5 SIDs for Fagear, which were new (not _like_ new, virtually new, unused old stock - late '92 datecodes, pins still slightly bent …

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Re: Innovation SSI 2001 re-engineering and/or conclusions

Posted on 2015-02-09, 11:25

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by shock__

in Marvin \ Sound

in Marvin \ Sound

For fully-assembled cards I also need to know, what SID will be installed in it. Because with 8580 there must be a 78L09 reg and filter caps 6.8nF, but for 6581 there must be short on +12 and 1nF caps. Would it be possible to design this in a way that you can easily switch between SID types using a …

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Re: Reversing the Disney Sound Source

Posted on 2015-02-06, 09:23

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Can you also post schematics (with componen values too) if you want to have a review? That would be very welcome :) http://i.imgur.com/Ss9CHJd.png I just want to see how the FULL signal handling is now. If one of them is full, the other one should also be full, or they are one or more samples out …

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Re: Reversing the Disney Sound Source

Posted on 2015-02-05, 12:44

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Breaking news! Another PCB update (aka still waiting for the ICs to arrive). http://i.imgur.com/VmO6cAR.png Adapted the single input NOT-gate to a dual input NAND-gate for the FULL signal. Cut down most jumper wires to sane lenghts. Added pre-resistor for finetuning the output rate, while …

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Re: Reversing the Disney Sound Source

Posted on 2015-02-03, 14:59

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by shock__

in Marvin \ Sound

in Marvin \ Sound

Ok, just double-checked my reversed scheme based upon photos I took - no base resistor there either. Not being familiar with that concept, maybe you should push me into a direction Jepael ... my googled knowledge has led me to anything between 1k and 1M being a suitable value.

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Re: Reversing the Disney Sound Source

Posted on 2015-02-03, 11:17

by

by shock__

in Marvin \ Sound

in Marvin \ Sound

Oudated - and doublepost, please delete/ignore.

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Re: Reversing the Disney Sound Source

Posted on 2015-02-02, 11:44

by

by shock__

in Marvin \ Sound

in Marvin \ Sound

Thanks. Should work. If there exists a "HC" version, it will have more symmetrical output drive for the R2R dac, but I would not worry (the original LPT port had "LS" types as well). To my knowledge the ALS variant is the only one in existance (I tried checking for pretty much anything (HCT/HC/F) …

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Re: Reversing the Disney Sound Source

Posted on 2015-02-01, 21:51

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by shock__

in Marvin \ Sound

in Marvin \ Sound

What's the type of the 4-bit FIFO chips? 74ALS232 (16x 4Bit) The two FULL output pins should not be tied together, only one push-pull output should drive the transistor. Alright, thought so :) And, there is no series resistor between FULL output pin and transistor base, it needs one or it might …

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