matloh
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Hi - i'm a newbe here - need your advice pls
i have bought a c64g and i think i've got fake or dead filter in my sid - when i was using cynthcart (loaded from tape) when filter option is turned on there is no sound - if i turn it off everything is ok - when its disabled everything is ok - but with filter on i get very low almost unhearable sound - when i turn on fifhts option i can hear something - and when i press two notes or three at once there is a sound - shall i sell it or is there a way to fix it? maybe it's a fuse or something?

in couple of days i will be able to test my other c64 which i bought for 6581 sid (i hope it will be fine heh) - but i want 8580 too - can you pls help me? i've ordered mssiah and i'm afraid i will have to buy next c64g but right now i'm afraid there are a lot of fake /demaged sids out there -

where i can buy tested one? with working sid filter?

Last edited by matloh (Feb 17, 2015 12:46 am)

lvlzero
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Baja California

have you tried to change the filter amount (I don't remember right now the key combination, so check it out)?. if you still have issues, maybe you shoud check the motherboard for damaged parts. if your sid is damaged, your two only options are hunting for sid on the internet (pretty rare now days) or trying to get a new c64 with (hopefully) a working sid. most of the time. i've seen people selling c64's on ebay and clearly are you best choice to get a working one unless specified.

matloh
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thx for reply - i've changed the filter amout - not working - i've just found an post from 2005 with exacly the same problem:

https://groups.yahoo.com/neo/groups/syn … topics/767

- but guy just changed his c64g... so i guess there is no other way for me then buy another one heh or maybe it's the filter capacitors? (dunno how to check them smile - i've even found the code to test filters if someone is interested - will try to type it in tommorow :


10 poke54296,15+32 :rem filters:  +16=low-pass, +32=band-pass, +64=high-pass
20 forv=1to3:print:print"voice";v:forl=54272to54295:pokel,0:next
30 onvgosub80,90,100:pokehf,15:pokelf,35:pokehp,8:pokelp,0:pokea,9:pokes,128
40 pokew,65:poke54295,2^(v-1)+128:forp=0to1
50 forf=0to2047step9:gosub70:next:forf=2047to0step-9:gosub70:next:next:next
60 forl=54272to54296:pokel,0:next:end
70 printf;"{left} {up}":poke54294,f/8:poke54293,fand7:return
80 w=54276:a=54277:s=54278:hf=54273:lf=54272:hp=54275:lp=54274:return
90 w=54283:a=54284:s=54285:hf=54280:lf=54279:hp=54282:lp=54281:return
100 w=54290:a=54291:s=54292:hf=54287:lf=54286:hp=54289:lp=54288:return

Last edited by matloh (Feb 17, 2015 1:18 am)

matloh
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ok - now i found a wav file to test sid:

http://plogue.com/davidv/sidbench/sidbench1.zip

and a d64 image  program:
http://plogue.com/davidv/sidbench/sidbench1.d64

or simply go to:
http://ploguechipsounds.blogspot.com/20 … hmark.html

plgDavid
Offline
Montreal
matloh wrote:

ok - now i found a wav file to test sid:

http://plogue.com/davidv/sidbench/sidbench1.zip

and a d64 image  program:
http://plogue.com/davidv/sidbench/sidbench1.d64

or simply go to:
http://ploguechipsounds.blogspot.com/20 … hmark.html

I approve of this test smile

matloh
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great job!!!

Jazzmarazz
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Michigan

Do you really have a c64g? If so, those are kings rare. Flip it and buy yourself two regular breadbins or c64c's.

And yes, SIDs are notorious for dying of a number of reasons. Bad controller inputs, wrong power supplies, etc. Its tough, but the swinsids are pretty close too.

matloh
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c64g kings rare? really? they are like 25$ solo in Poland hehe - many of them i guess

this is my setup for 50$

http://img02.allegroimg.pl/photos/orygi … 5032340222
http://img02.allegroimg.pl/photos/orygi … 32340222_2


they were mass produced in Germany/China and many of them are being sold cheap in here - but most of them have filter problems...

i will be replaycing my c64g sid - just found a good dealer from Germany - 28$ for 8580 sid tested with working filter smile

Last edited by matloh (Feb 17, 2015 7:41 pm)

matloh
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wow swinsid looks nice - anybody did midibox sid with them? now i'm wondering about really digging this project because finding 8 similar sids is almost impossible right now smile