Help! I Need some suggestions

MIDIbox SID
1

Hello,

I’m trying to build a MIDIbox SID. I already assembled the Core and the SID modules.

The core seems to comunicate through MIDI ports with MIDIOX, so I update MIOS_v1_8 and

I load MIDIBOX SID_v1_7a.

And now the problems start.

  1. The LCD doesn’t show anything. To be more precise: the back lite is on but it is not possible to read anything.

I checked the connection between LC and Core module and everything seems OK!

Since I’m tryng to use a 4*20 LCD I changed main.asm file for 2*40 LCD. Is it correct?

With MIDI-OX I sent        F0 00 00 7E 40 00 0D 02 00 0B 0A 00 00 00 01 00 00 00 00 F7

and MIDI-OX received    F0 00 00 7E 40 00 0F 04 00 F7

I expecetd to receive      F0 00 00 7E 40 00 0F 00 02 F7

Where is the problem?

  1. SID MODULE: no sound only a small noise that could due to a bad 50Hz filter.

I run the interconnection test and everything is fine.

I’m using the C64 PSU modified (but not optimized)

Which other test can i do to solve the problem?

Any suggestion is welcome

Ciao

Antonio

2

hi,

  1. The LCD doesn’t show anything. To be more precise: the back lite is on but it is not possible to read anything.

just to be sure, did you adjust the trimpot for lcd-contrast on the core module?

Since I’m tryng to use a 4*20 LCD I changed main.asm file for 2*40 LCD. Is it correct?

i dont know if this is possible

cheers, marcel

3

Hurrah!!!

my SID is working  and my LCD is displayng the following characters:

A 1    C 1    1 ------------

Internal Patch.

Is it ok???

4

The MIDI SID  is working but after a while of nice sound there was a reduction of volume and an increase of noise.

I don’t know what happened. Maybe something too hot, maybe some bad connection, maybe…

Is there anyone that want to suggest me something?

Regards

Antonio

5

The MIDI SID  is working but after a while of nice sound there was a reduction of volume and an increase of noise.

Be shure that all capacitors are stuffed in the right way, perhapse this will solve your problem…

… just an idea :smiley:

greets,

pwx

6

Thanks!

Another problem could be some bad connection!

Tomorrow i will check!

What about the display?

It shows the following message:

A 1    C 1    1 ------------

Internal Patch.

Is it correct?

7

Yes, thats correct

It will change, once you press the exec button

Best Regards, Thorsten.