l0calh05t

perhaps this is a dumb question, but how do i change patches and/or edit sounds? i have no control surface and no bankstick (yet)

ok, i guess i'll just use a switching jack on the in, so it's always grounded when not in use.

well, i just connected the audio out again, and guess what... it now plays the tones i press on the keyboard. this silent sound i heard before is still there and exactly the same as before, but now the sounds that are supposed to be played are played in the foreground. wierd.

finally got around to measuring with the sid inside: 11.7V (11.73V without this time), so no big difference oh, one more question: is it normal that when the mbsid software is installed that i get all this when booting the synth? [tt]timestamp 790996000 us: Sysex message: F0 00 00 7E 40 00 01 F7 timestamp 793300000 us: [C0 00] channel 1: program change 0 timestamp 793300000 us: [C0 00] channel 1: program change 0 timestamp 793300000 us: [C0 00] channel 1: program change 0 timestamp 795518000 us: Sysex message: F0 00 00 7E 46 01 0D 00 00 00 F7 timestamp 795527000 us: Sysex message: F0 00 00 7E 46 01 0D 01 00 00 F7 timestamp 795535000 us: Sysex message: F0 00 00 7E 46 01 0D 02 00 00 F7 timestamp 795544000 us: Sysex message: F0 00 00 7E 46 01 02 00 49 6E 74 65 72 6E 61 6C 20 50 61 74 63 68 20 20 7F 00 00 00 00 00 00 00 00 01 40 00 00 00 40 40 40 40 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 40 42 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 40 3E 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 00 00 7F 00 00 7F 00 00 7F 00 20 10 2E 00 00 00 07 10 7F 07 20 00 01 03 7F 01 40 00 01 50 7F 01 60 00 7F 40 40 40 40 00 60 60 20 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 38 F7 timestamp 795628000 us: Sysex message: F0 00 00 7E 46 02 0D 00 00 00 F7 timestamp 795637000 us: Sysex message: F0 00 00 7E 46 02 0D 01 00 00 F7 timestamp 795645000 us: Sysex message: F0 00 00 7E 46 02 0D 02 00 00 F7 timestamp 795654000 us: Sysex message: F0 00 00 7E 46 02 02 00 49 6E 74 65 72 6E 61 6C 20 50 61 74 63 68 20 20 7F 00 00 00 00 00 00 00 00 01 40 00 00 00 40 40 40 40 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 40 42 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 40 3E 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 00 00 7F 00 00 7F 00 00 7F 00 20 10 2E 00 00 00 07 10 7F 07 20 00 01 03 7F 01 40 00 01 50 7F 01 60 00 7F 40 40 40 40 00 60 60 20 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 38 F7 timestamp 795738000 us: Sysex message: F0 00 00 7E 46 03 0D 00 00 00 F7 timestamp 795747000 us: Sysex message: F0 00 00 7E 46 03 0D 01 00 00 F7 timestamp 795756000 us: Sysex message: F0 00 00 7E 46 03 0D 02 00 00 F7 timestamp 795765000 us: Sysex message: F0 00 00 7E 46 03 02 00 49 6E 74 65 72 6E 61 6C 20 50 61 74 63 68 20 20 7F 00 00 00 00 00 00 00 00 01 40 00 00 00 40 40 40 40 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 40 42 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 40 3E 02 00 04 40 00 00 00 00 7F 00 00 00 00 00 00 00 7F 00 00 7F 00 00 7F 00 20 10 2E 00 00 00 07 10 7F 07 20 00 01 03 7F 01 40 00 01 50 7F 01 60 00 7F 40 40 40 40 00 60 60 20 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 38 F7[/tt]

i'll check tomorrow morning it's *still* to hot to do anything right now...

it is mounted as shown in http://www.ucapps.de/mbhp/mbhp_sid_v2.gif , with the heatsink pointing towards the big electrolytic. (and it's a L78S12CV )

theoretically yes, but since im moving away in less than 14 days its a bad moment, perhaps as soon as i'm in cottbus might be better. i do have other sids i could try in the module but considering that this one was getting pretty warm, im scared they might break...

i'm in germany (frankfurt a.m. for the next two weeks, after that, cottbus) so i'm pretty sure there's at least one person with a midibox sid :P but i cant think of anyone close by who has either.

thought so no, don't have any c64 to test the sid in... :(

nothing wrong on the interconnect test (unless it's a big error if i get 0.01V instead of 0V on CS# for mod wheel value 14)

ok, after solving all my psu troubles, i connected the sid module and the core module and powered everything up. uploading the midibox sid software went fine, but i'm getting nothing but a constant, fairly silent tone, of which i can change the pitch by pressing the keys of my keyboard (but the changes are totally out of tune and there is no attack or anything, and as i mentioned it's pretty quiet...). and the sid (6581R4AR is getting pretty warm) and yes, i did check all voltages they were a-ok, 11,8V for the sid and 5,3V for the core. edit: and the testtone app just produces some loud clicking/thumping directly after upload (just as after the upload of the sid software).

looks at board looks at schematic looks at board slaps head :-[ I hate desoldering... (edit:) because it never works...

ok, after solving my core module power problems i built the sid and to be able to test it i built the optimized c64 psu circuit on a piece of perfboard (though the way i soldered all that i might just as well have gone point-to-point... ::) ) but guess what! more psu problems! at the 5V pin i measured 5.23V (after getting 0V until i found a bad solder) but at the 14V pin i get a whopping 17V and the 7809 (and it *is* a 7809 not a 7812) is getting pretty warm pretty fast for there being practically no load... between pin 2 and ground i get 5V (as there should be) and between pin 2 and 3 of the 7809 i get 12V (not what there should be, this should be 9V)

i got my sid chip(s) on ebay. actually i bought a C64 but i talked a little with the seller and he suggested selling me a bunch of 6581's (two 6581's and a 6581R4AR) and a C64 psu for 15€ instead.

wohoo! i powered my core up, connected it to my motu traveler and got a nice steady blinking from my midi in port due to the upload requests. uploaded mios 1.9b: no errors. :D to do a little midi test i uploaded midi benchmark. seems to work great. on to the sid module!

i checked for bridges between tracks after every soldering, so it should be fine. the solder joints look ok (except for the rectifier and regulator, where they are real ugly, but they seem to conduct just fine) the decoupling caps are in place although not as close as shown on the images as i didn't have any tweezers i could use for this and didn't want to burn my fingers. the psu is an ebs psu (for guitar effects rated 9V 500mA) and i ordered a pic with a bootstrap loader so i guess as soon as i connect the midi ports i should be good to go (i sure hope it works...)

put in a new 7805 and now i got a nice and steady 5.04V at all pins mentioned in the soldering guide 8) i suppose i can put in the optocoupler and microcontroller now and connect the midi ports to check if my core is ok and then i can upload mios, right? (and then i'll start building the sid module and think about how i'll go about making a psu for both. probably using the C64 psu.)

well i reconnected the psu, got 0.09V this time at C5 and then figured that if everything seems ok, why is it wrong? i then checked the + an - pins of the rectifier directly by pushing the probes onto the pin ends directly (which wasn't particularly easy when the "helping hand" always slides away" and guess what? 9v. so yeah probably i fried the first rectifier and this one has a bad solder point (although it looks ok...)

a: value started at -15k (precision setting: 200k) which would be the capacitor discharging, value kept rising and rising and after approx 5 minutes the value surpassed 200k so i got a display of infinity and switched to 2M precision where the displayed resitance jumped to 1.98M and kept rising. so yeah, i was charging the cap reaaaaal slowly... b: basically a in reverse, and honestly i didnt feel like holding the multimeter there for more than 5 minutes again... c: infinity (or more than 2 megaohms) regardless of polarity, this does seem strange and can't really be true.

i never put the optocoupler in as according to the tips for soldering the core module. yeah, 9vdc is what i would have expected at the outputs of the rectifier even without that cut track, but that's not what i get... well, i'll try the cutting later on, maybe tomorrow.

actually no, it should turn infinite here as well. remember, the 7805 is removed (and i didn't put in a wire bridge, so everything else is connected only via ground, and not via "+5v" and should have no effect, and if i cut at the point you marked i would only be measuring the resistance between C5 and C6

so basically i should take the capacitors out of the equation so that i can see if i get 9v when they are removed, but why should i get an ohmic resistance as soon as c5 (and c6) is charged? shouldn't i get an infinite resitance as there are no resistors there?

it's the same as the core v2 module on the ucapps site

i already checked the first rectifier after removing it. it's completely dead, but that might also be due to my methods of removing it from the pcb... ::) the board *should* be ok, i ordered one of those pre-made ones from mike's electronics (or what it's called) and looked pretty much like the sample pcb i printed for mounting, except for an excess hole (far from the psu part, and absolutely harmless)

yeah, i understand. i'll have to check how much that stuff costs. ok lets recapitulate what i need: Breadboard Parts to emulate the PSU Input: uC 7805 0.17€ D40C800 0.17€ 2200 uF electrolytic 330 nF cap 10 uF electrolytic 100 nF cap did i miss anything?