ChrisHipgrave

Hi, Last night i tried to upload the DIN interconnection test and something weird happened. It showed me an error and the LCD came up with bars along the top row. I tried to upload the test again and nothing, so i tried to upload the main.hex from the MIDIbox SID file. This did not work either and MIOS studio showed a message saying something like "MIOS is already loaded". Anyway, i left it for a night and tried again a minute ago. This time it was fine and i re-loaded the main.hex file. The problem is that my buttons are still not working, Could it mean that there is a short somewhere and that is why i had the strange behaviour from it? Thank you Chris

Hi all, I made my MIDIbox SID as a university project and now i have to do a write up about it (not that it is finished). Anyway, i was wondering whether anyone had some sort of diagram showing how MIOS interacts with the PIC? Also any other diagrams of stuff would be much appreciated (I need to fill up more space)! Thank you Chris

yeah sorry, thats what i meant. I've soldered the five wires correctly.

Hi, I've checked and checked the connections and they all seem fine. I changed the double row IDC connector and soldered the four wire from the CORE to the DIN but now nothing is working. ??? I'm very confused. Can anyone help me on this? Thank you Chris

Yes i've connected J4 VS to the rotary encoder and to the menu button and button 5. Is this not correct? It shows this on the 2x20enc.pdf. Should i connect them to the VS on J3? Chris

Hi, For some reason, the menu button, button 5, and the rotary encoder does not work on my MIDIbox SID. All the connections are correct and i've swapped around the 74HC165's a couple of times but no luck. Is there anything else it could be? Another thing, i've connected J1 of the the DIN to J9 of the core with ribbon cable and a double row IDC connector so J8 is going to the second row of J1 on the DIN. Could this be why? Thank you Chris

Hi, Does anyone know where i can get a rotary encoder from in the UK? I need one really quick. Thanks Chris

Ok thanks, so are the 10k pots log or lin? Thanks Chris

Hi all, So i finally got the first sound out of my MIDIbox SID! Thanks to Tim for all your help. I still have a couple of questions though. I want to add a contrast pot to the synth and i'm not sure how to do it. Do i just remove the trimmer pots on the CORE and replace them for some pots which i can fix to the box? If so, what value are they? Also, i'm using a 2x20 LCD screen from SmashTV and wondered what the four holes on the right hand side are for? Thank you Chris

Hi, So, i got a new CORE module from SmashTV and i've built it up. I checked my PSU again and i'm getting 5.15v and 14.18v. The first thing i tested was the current from the 5v of the PSU to vd of the CORE and i'm still getting 0mA. So i'm guessing that it's something to do with my PSU? Does anybody know what it could be? Thank you Chris

I've checked all the pins and they seem fine. Is there anything else it could be? Thank you Chris

ok so i checked all the pins in the list and re-soldered a dodgy resistor. The pins were not touching each other and the board is from SmashTV so the connections cannot be wrong, can they? Tried it again and now i'm getting 4.5mA without the PIC and around 90mA with.

Oh yeah, sorry i had the multimeter on the wrong setting. I'm getting a reading of about 14mA without the PIC and about 100mA with, this is wrong is it? Thank you Chris

Yep the optimized PSU and j2 and the 7805 has been removed and the holes bridged. I wasn't measuring the current correctly before, but i snipped the +5v cable and measured the break and still 0mA. Chris

I'm getting 5.18v DC from the 5v and 14.18v DC from the 14v. With the multimeter on the current setting it's reading 0. Is that right? Thank you Chris

I tried it again and now the MIDI in window is coming up with the following message: 00000000036694 ms | [FF] System Reset 00000000043710 ms | [FF] System Reset 00000000053522 ms | [FF] System Reset Can anyone shed any light onto this? Thank you Chris

Hi, Now i've changed both resistors 9 and 10. I'm now getting 4v in pin 20 so i thought i'd try uploading MIOS again. This time i got a different set of errors: Starting upload of mios_v1_9c_pic18f452.hex Hex file contains code in MIOS range, forcing reboot! Received Upload Request Sending block 00000400-000004FF Received Checksum: 1D - OK Sending block 00000500-000005FF Received Checksum: 4D - OK Sending block 00000600-000006FF Received Checksum: 11 - OK Sending block 00000700-000007FF Received Checksum: 0D - OK Sending block 00000800-000008FF Received Checksum: 1A - OK Sending block 00000900-000009FF Received Checksum: 61 - OK Sending block 00000A00-00000AFF Received Checksum: 4B - OK Sending block 00000B00-00000BFF Received Checksum: 1E - OK Sending block 00000C00-00000CFF Received Checksum: 68 - OK Sending block 00000D00-00000DFF Received Checksum: 09 - OK Sending block 00000E00-00000EFF Received Checksum: 36 - OK Sending block 00000F00-00000FFF Received Checksum: 63 - OK Sending block 00001000-000010FF Received Checksum: 78 - OK Sending block 00001100-000011FF Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error This was an expected error - please ignore! Error: Received unexpected Upload Request Sending block 00001000-000010FF Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Sending block 00000800-000008FF Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Sending block 00000600-000006FF Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Received error code 0B: MIDI IN Overrun Error Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Received error code 0B: MIDI IN Overrun Error Aborting after 16 errors Looks to me like it almost worked, does anyone know what could be wrong now? Is it still to do with pin 20? TK? edit: i've just realised that i sometimes get 4v from pin 20 and sometimes it's 1.7v! Thank you Chris

Anybody seen this? http://www.bigmech.com/misc/c64mods/index.html

Ok, i've changed resistor 9 and now i'm getting 1.7v from pin 20 and 5v from everywhere else shown in mbhp_core_extract_measuring_vdd.gif. The schematic doesn't show anything else is connected to pin 20, does this mean that the board is broken somewhere?

Thanks for the reply. I do not seem to be getting 5v from pins 20(0.3v) ad 26(1.3v) of IC1 when the SID and CORE are connected. When they are not i get 5v from pin 20. Could this be why? How can i fix it? Another question: When turned on my boards sometimes make a sizzling sound, is this anything to worry about? Thank you Chris

Hi, I'm having some trouble uploading MIOS to my CORE. I'm getting the following errors: Starting upload of mios_v1_9c_pic18f452.hex Hex file contains code in MIOS range, forcing reboot! Received Upload Request Sending block 00000400-000004FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Sending block 00000500-000005FF Error: Received unexpected Upload Request Aborting after 16 errors I'm using a preloaded PIC from SmashTV and am trying to upload the "mios_v1_9c_pic18f452.hex" file. I've seen that Toneburst has the same problem but he had a different error with the same file, i think that he solved the problem by getting a new optocoupler. Will i also need to do that? Thank you Chris

http://www.danielprice.org.uk/synth-diy/sid_2.htm

I've taken the 7805 out and bridged holes 1 and 3. Thats right isn't it?

Hi, I've sorted the PSU and am getting the 14v and 5v needed but my CORE and SID are not showing the right voltages. The CORE module shows the following:- IC1:MCLR(1) - IC1:Vss(12) = 5.16v IC1:Vdd(11) - IC1:Vss(12) = 5.16v IC1:Vdd(32) - IC1:Vss(31) = 0.06v ????? IC2(8 ) - IC2:(5) = 5.18v The SID module shows the following:- IC1:Vcc(25) - IC1:Vss(14) = 0.70v ????? IC2:Vdd(16) - IC2:Vss(8 ) = 2.55v ????? IC3:Vdd(16) - IC3:Vss(8 ) = 3.58v ????? What should i do? Also there is a kind of crackle noise (like flux melting) when it's turned on, what could this be? Thank you Chris

So i got my new c64 psu (finally) but i've got another problem :'( The 5v output is now reading 3.30v and the 14 is reading 12.30v Does anybody have any ideas what might be wrong with my psu board? I'm guessing that a component(s) broke when i wired it up to the SID and CORE?