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Old 23 December 2021, 10:47   #161
Jope
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Expansion.lib configures the big chunks to addresses beginning from $200000. The IO side of things gets autoconfigured beginning from $E90000

So yeah, you could potentially map yours from the top downwards.
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Old 28 December 2021, 06:26   #162
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Hello, I put this together and it worked once.. but then stupid me cleaned flux off with 90% IPA and may have reinstalled it before it had all dried under the CPU socket. This time I got a black screen and now it won't work at all. What components should I start troubleshooting? Replace CPU maybe?
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Old 28 December 2021, 08:49   #163
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Quote:
Originally Posted by opivy224 View Post
Hello, I put this together and it worked once.. but then stupid me cleaned flux off with 90% IPA and may have reinstalled it before it had all dried under the CPU socket. This time I got a black screen and now it won't work at all. What components should I start troubleshooting? Replace CPU maybe?
Sorry to hear that! I don't think something is really broken. I would rather think that some conducting stuff got stuck underneath chips, between pins, etc. The circuitry around the the 74HC(T)4046 is the most sensitive to that. I would recommend a second, thorough cleaning. Let it dry and try again!
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Old 01 January 2022, 00:17   #164
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Sorry to hear that! I don't think something is really broken. I would rather think that some conducting stuff got stuck underneath chips, between pins, etc. The circuitry around the the 74HC(T)4046 is the most sensitive to that. I would recommend a second, thorough cleaning. Let it dry and try again!
Thank you for the reply. I haven't cleaned it yet, but I noticed if I press down on it while in the socket it works somewhat but will eventually freeze with screen artifacting. I will give it a good cleaning tonight and try again.
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Old 04 January 2022, 20:29   #165
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Cleaned it and same issue. If I press down on the CPU socket it works but will eventually crash or display artifacts on the screen. I bought this as a kit from someone on ebay. Should I try a new CPU socket?
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Old 05 January 2022, 11:29   #166
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Ok, that definately sounds like some contact issues. Where exactly do you push down?
If you push down on one of the logic IC's it could also be a bad solder joint on the accelerator board that only makes contact when you push on it. I wouldn't immediately suspect the motherboard CPU socket.
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