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Finally got a chance to try my Tapuino out. I wonder if my settings are correct? I can browse and select a .tap file and it appears to start loading as the spinner spins and there is loading text but the percentage number doesn't grow and the C64 doesn't seem to find the program. The screen just stays blank.
Anything to try?
Sounds like the motor detect line is not working. Does the display show a lower case 'm'? If so, then the Arduino is not getting the motor signal. Check wiring and the opto coupler
Yes, it does show 'm'. The optocoupler I have is 4N36 as my local store didn't have the 4N35. The 4N36 is pin compatible with 4N35. Could that be the issue?Quote:
Originally Posted by sweetlilmre
Also I don't seem to be able to update the firmware as I'm getting avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x30 in the Arduino. I've checked that the board, processor and port are correct.
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The upload now works. It was a case of bad USB cable.
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Think I found the problem. I tried with a datassette. The C64 isn't giving motor signal. :(
On no :'( Have you checked your PSU voltages and 5v on the datasette edge connector?
@protek are you using JiffyDos by any chance?
Edit: you need to check the fuse in your machine as well. Seems this often happens with a blown fuse. Be sure to test the PSU as well...
No JiffyDos in this one, just normal Basic prompt. The fuse seems ok visually and gives continuity with multimeter, when removed. Tried with two PSUs. Can the PSU be measured straight from the plug?
You can measure the PSU at the plug side. It would also be good to measure after the switch on the C64 as this can cause issues (corrodes and causes massive resistance and voltage drop).
The two closest together pins on the PSU should be the 5V DC line, you should read over 5V. The other two will be the 9V AC line (remember to set your meter to AC :)).
Test the 5V line on the Datasette edge connector as well (this is a way to see if the switch is causing issues: if it registers much less than the PSU 5V line there is a problem).
The Motor line power is provided by the 9V AC supply so there may be other factors at work. I hope its not the CIA.
Do you have any way of testing sound? The 9V line also provides power to the SID.
-(e)
Ok, Tapuino tested working. Dug out my breadbin. It loads games fine with two of the three tested PSUs. The one that came with the C64 C won't even give a picture with the breadbin even though it does with the C. Tapuino won't get motor signal from breadbin either with the C's PSU.
Motor doesn't get signal on the C with any of the tested PSUs. A capacitor issue perhaps? I'll try and change also the fuse just in case.
No sound on the C model. Does it turn the odds in favor of the 9V instead of the CIA? I have a junker C128 motherboard, from which I can take the CIA.
About measuring the plug, the 5V is pretty obvious but do I measure the 9VAC from both 9VAC pins and not one 9VAC and ground? My intuition tells to measure from both 9VAC pins.
Brave man... that bad PSU could have done nasty things to your breadbin! :) luckily not.
So the PSU isn't good. Please test and report back, it might help to know what it is supplying.
If fuse has continuity then it seems that is not the issue, but it doesn't hurt to swap and test.
If there is no sound and no motor, then there is a problem with the 9V supply. I'll have a look and see what I can learn about this issue.
-(e)
Voltages measured. Both good PSUs gave 10,9 VAC and the bad one only 1,3 VAC. All three gave around 5,1 V.
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Did a bit of sanity check on the sound. I am getting sound on the C with a good PSU. That pretty much rules out the fuse.