Sid interconnection problem..help!!

Testing/Troubleshooting
1

Hi all

Im new on the midibox…

the core seems to work ok, i upload de bootloader, the miox and the main of the midibox sid with MIOSStudio_beta7_5 and all ok but no sound.

reading the intruccions i try to check the conections with the mbsid_interconnection_test_b and the problem is only the pins “A”, res and CS works with the mod menssages, the rest nothing.

tested with 3 difernt 6581 sid that i have, so seems not a problem of the chips.

Anyone can help me?..  :-\ ???

Thx a lot

those ones doesnt go to 5V:

 

    # 6: Pin D0 = 5V

;    # 7: Pin D1 = 5V

;    # 8: Pin D2 = 5V

;    # 9: Pin D3 = 5V

;    #10: Pin D4 = 5V

;    #11: Pin D5 = 5V

;    #12: Pin D6 = 5V

;    #13: Pin D7 = 5V

sorry for my bad english.

2

Hi matcom,

it looks like there is a missing or bad connection between IC2 and IC3, see also the schematic http://www.ucapps.de/mbhp/mbhp_sid_v3.pdf

You will see three control lines which are going to the SCLK, RCLK and SER input of the 74HC595. At least one of them seems to be faulty. You can check these signal lines visually, and/or with an ohmmeter when no ICs are connected

Best Regards, Thorsten.

3

thx…, the problem was an error of soldering, SER and GND were together… a new midibox sid has born…and it was incredible…

thx again and “muchas gracias” as we tell in spain.

4

Great! :slight_smile:

Best Regards, Thorsten.