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Conrad
Registered: Nov 2006
Posts: 849 |
SID2SID board at $de00 ... problems...
First of all, there is nothing wrong with the circuit board, the components on it, the two 8580 SID chips, or the C64C. I have cleaned pin 7 of the cart port, there is no contact with the CIA chip as mentioned in the manual... and I'm using a C64C PSU providing 5V/1.7A... but the board still hangs up the C64 when the switch is turned ON! ... the switch is turned off when the C64 starts, no problems.... but switching it on crashes it.
There surely must be something else, programming wise, that I am missing to get this working. There is no cartridge inserted either.
Can anyone help me please? ... and Mace, I know this is going to make you think that I am not listening to your advice... but I am getting really frustrated with this board.
I heard on prophet64 forums that others had the same problem, but no one seems to help them on there these days... that's why I'm asking here. |
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Mace
Registered: May 2002
Posts: 1799 |
No offence taken, I'm curious too as to what the problem (or rather, the solution) is :-) |
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Hermit
Registered: May 2008
Posts: 208 |
Hi, Conrad
When I built this 2SID PCB (came with my MSSIAH) into my C64 it worked fine. I don't remember any flaws on the PCB, however I had to solve it with 2 IC-sockets (one at the top one soldered to it at the bottom) as here I couldn't acquire a long-legged socket - this was the only difference to the building-manual.
Also I didn't have to disturb anything with CIA chips IIRC, pin7 of the User Port was a good $DE00 chip-select method for me.
Can you show/send some good quality photos about the top and bottom of the board and when it's put in the machine.
Maybe we can point out some issues on the pictures...
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Conrad
Registered: Nov 2006
Posts: 849 |
@Hermit:
I've took some photos of the board etc...
https://picasaweb.google.com/101855972263378458104/SID2SIDPhoto..
i also have a video, will post that later on.
components on board:
103, 471, (2x) 22n (for 8580 chip), 10uf, and 2N/3904/617 |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
the first thing i'd do: measure the 5v DC voltage with and without the board. if it drops below ~4,7V then take your PSU and burn it =) |
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Conrad
Registered: Nov 2006
Posts: 849 |
Video is on that album now.
@Groepaz: me and my mate tested that yesterday... voltage went down to about 4.9V in both cases... so the PSU's fine. |
