are these voltages in sid correct?

Testing/Troubleshooting
1

now that the interconnection test works, but none of my sid seem to work, i wonder if these voltage i read between GND and SID socket are correct:

pin     V

1      0

2      0

3      0

4      0

5      5

6      0

7      0

8      5

9      0

10      0

11      0

12      5

13      5

14      GND

15      5

16      5

17      5

18      5

19      5

20      0

21      0

22      0

23      0

24      0

25      5      

26      0

27      0

28      12

(using 6581, mios 1.7 and sid 1.6)

core is working correctly

the problem is that when i power up, all i hear are electric transients. i also tried with sidplayer, but no note are heard… just very small volume clicks and blips…

beside this the sid was gettin really really HOT

by the way, could the transistor on the audio output of sid be fused?? is the only thing that’s lets (apart the fault of all my sids)

2

Hi,

You can find pin list (these don’t refer to sid pins, but pin names) from main.asm of the sid interconnect test and then use sid schematics for cross reference.

Bye, Moebius

3

no, you either misunderstood or i asked the wrong question:

these are the voltages that i read on SID socket when i load the SID MIOS application, not the interconnecting test!

the interconn. test is good

but the sid still won’t play…

i’m using mios 1.7, sid 1.6, hardware mods for mios 1.7

the core is working, i see the text on LCD and i’m able to use the control surface

4

Sorry.. I didn’t understand..

Well, “power” seem ok.. and I don’t know what to expect from other voltages, other than measuring osc or data/address lines, doesn’t make any sense :wink: (Did you check that in interconn. test lines also were in default state, when not selected.. of course you did)

It’s very unlikely that all your sids are broken..

Do you use onboard oscillator on SID? If that is the case, you could try clock supplied from core.

Also it’s worth trying to change BC547 on sid output.

Bye, Moebius