Back from exams and ready to go again !

MIDIbox SID
1

Hi ! By now the exams are gone finally and I have some time for this project.( I left it on chrystmas more or less ). Yesterday I took everything out of the box and I connected it to my PC MIDI port. I’ve been learning and reading a lot about Sysex and MID while I was studying, so right now I can talk better about the thing that phushed me out to leave the project till now.

The main problem was  : I can send Sysex messages to the PCIF ( It used to be the MIOS v1.8 and the sid testtone ) I mean, the communication exist between the two parts, but I can hear no sound coming out from the 8580 and the 6581 once I test them. I even tryed to play some notes from my master keyboard and nothing comes out. The last time I tryed to get sound from them back on last xmas, I remember that I revised the voltages coming in and out from the PSU and in all the circuits. It was ok. What could happen ? Can somebody help me getting inside the project again ?

Will you suggest me to start over again  ? Thanks. Very cool new style for the forum, greets !

I’ll add some pics to show you how my crap look like :

2

Hi,

the most common error which are made are wrong interconnections between SID and CORE module - note that on the old PCB versions, the two 8pin ports are not connected 1:1. At the MBHP_SID module webpage you will find some diagrams which show the wiring (e.g. mbhp_sid_c64_psu.pdf), and at the MIOS download page you will find an mbsid_interconnection_test which allows you to test all cables to the SID module

Is this test passing? (Test procedure is described in the header of main.asm)

Best Regards, Thorsten.

3

Ok, no I did not try that. I will do it and I will post it here then, thank you for your help, T.

4

Ooof, your J2 connections at the SID module are looking very error prone!

Best Regards, Thorsten.

5

I’m following the Optimized PSU. I revised the interconnection and there’s something I did not connected before. Can you explain how do you connect the J7 SO to the CLK pin of the SID ? I don’t know what pin is it. I did not make the bridge at J4, is it right to do it ? Thanks a lot.

I’m debugging here.

1- The 8580 gets very very hot, unlike the 6XXX.

2- In MIOS STUDIO, I get message errors now while uploading applications: Less bytes than expected where returned.

A picture of my crap with the revised connections :

6

just a heads-up, dcx… Edited posts do not show up as unread, even though they are, so it’s best to make a new post if you want to draw attention to it :slight_smile:

7

Don’t swap out the 6581 for an 8580 unless you also change the regulator, otherwise you’re putting too much voltage to the 8580.  The 8580 takes 9V, 6581 takes 12V.  I see from one of the shots in your first post you’ve got a 7812 regulator but you should use a 7809.

8

As for the clock pin, the details are on http://ucapps.de/mbhp_sid.html - take a look at the second last picture on the page.  To follow this revision (which may not have been there when you first started) you need to remove the oscillator from the SID board.

Welcome to the joyous world of desoldering.  For home use I personally use a “sold-a-pullt” although vacuum bulbs or solder remover wick both work well.  (On boards with plated through-holes, however, the wick is less effective).

9

Hi nebula ! Thank you for your help here. The removing of the oscilator is done now. When I try to upload any aplication, the MIOS studio give a message back : error, less bytes than expected. And then the system makes a reset. What happens there ? Thanks.

10

Could you please copy&paste all messages which are print by MIOS Studio within the upload window?

Best Regards, Thorsten.

11

Of course T.

This is the total output when trying to upload something (always happens the same )

SYSEX UPLOAD MONITOR WHEN TRYING TO UPLOAD :

Starting upload of setup_6581_without_cs.HEX

Sending block 00003000-000030FF

Received error code 01: Less bytes than expected have been received

Sending block 00003000-000030FF

Received error code 01: Less bytes than expected have been received

Sending block 00003000-000030FF

Received error code 01: Less bytes than expected have been received

Sending block 00003000-000030FF

Received unexpected MIOS SysEx message = 000040000E016AF7  expected = 00007E4000

MIDI IN WINDOW AFTER TRYING TO UPLOAD SOMETHING :

timestamp 24950000 us: Sysex message: F0 00 00 7E 40 00 0E 01 30 F7

timestamp 62074000 us: Sysex message: F0 00 00 7E 40 00 0E 01 7C F7

timestamp 62166000 us: Sysex message: F0 00 00 7E 40 00 0E 01 46 F7

timestamp 62292000 us: Sysex message: F0 00 00 7E 40 00 0E 01 43 F7

timestamp 62396000 us: [FF] System Reset

timestamp 62395000 us: Sysex message: F0 00 00 40 00 0E 01 6A F7

Before doing some changes on the board, I remember that I was able to upload apps without any problem. Best regards, Xavi.

12

So, if it has worked before, there is a high chance to detect the problem by going through the MIDI troubleshooting list:

http://www.ucapps.de/howto_debug_midi.html

Which tests are working, which not?

Best Regards, Thorsten.

13

I’ve noticed that I don’t have any jumpers on the programming port. I remember to troubleshoot the MIDI before I left the project, and then I was able to upload MIOS and so. Do I need the jumpers on the programming port ? When I try to upload using : Don’t use feedback from core, first I get the error messages, but after 3 errors It continue uploading and then it finish right.

14

Of course, the jumpers at the programming port should always be closed. They are only for programming via JDM or MBHP_BURNER

Without these jumpers, your core will be powered from the MIDI connection, and this cannot work reliable

So, is the upload working again with the jumpers?

Best Regards, Thorsten.

15

I measured voltages at the core with mbhp_core_extract and everything is ok too. MIDI jack polarity, port connections are done too. Ground measurement is done. Everything seems to be fine, I even tryed to do the LED test on the midi out jack and it works fine. My core module does not have any programming port ! Maybe I have a newer version ? Thanks T.

16

Could you please try the complete test? (e.g. io loopbacks…)

Best Regards, Thorsten.

17

New error message, different from the common :

Starting upload of mios_v1_8.hex

Sending block 00000000-000000FF

Received error code 01: Less bytes than expected have been received

Sending block 00000000-000000FF

Received error code 01: Less bytes than expected have been received

Sending block 00000000-000000FF

Received error code 01: Less bytes than expected have been received

Sending block 00000000-000000FF

Received error code 04: Write failed (verify error or invalid address)

Aborting after 3 errors

18

Is your core running with bootloader v1.1b or v1.2?

Did you already update to Bootloader V1.2, MIOS V1.9, MBSID V1.7303?

(Please don’t do it immediately, I only want to know, if you did this before, and that you are now trying to upload an incompatible version)

Best Regards, Thorsten.

19

And again: please try the io loopback tests! They are important, no additional answer before you’ve checked the MIDI connections in this way - it’s just too time consuming

Best Regards, Thorsten.

20

Let’s see : I can’t test the loopback because I just can’t upload any app to the pic. I tested to play notes but nothing comes out of the midiboxsid. Otherways I have a single response from MIOS when I plug it.

Versions : Bootloader from Smash TV on summer last year, MIOS V.1.8 and MIDIboxSID V1.7a.

Thanks and sorry for being a little ansious.