How do you diagnose NUBUS slot problems on a IIci? Are they repairable?
Here is the situation: IIci, hard drive was replaced with a SCSI2SD. We have a special card in the NUBUS slot which communicates with a motion control board which is attached externally. From everything I can see, the software is installed correctly on the IIci, and it starts up as expected. The problems start when the IIci starts communicating with motion control board. It appears to be sending the wrong instructions to the motion control board and as a result, the large machine it controls is exhibiting some odd behavior. I am using the same SCSI2SD setup on 2 IIsi that are attached to 2 other machines that are the same model as the one with the IIci in it, without issue.
Due to the bizarre behavior, we swapped the SCSI2SD IIci for an older one we have for back up with an ancient HDD in it. Same software, same NUBUS card, same motion board. The problems with the large machine disappeared. The only significant difference is the SCSI2SD. As I am running those two other machines on a SCSI2SD without issues, I am reluctant to focus on the SCSI2SD as the problem, especially since it boots the way it is supposed to, and starts up the software the way it is supposed to.
Could it possibly be the NUBUS slot? Considering that the boards are the same and the strange behavior ceases to exist when installed and attached to another IIci, I thought it would be worth asking how to determine if that is indeed the problem, and how to tell what can be done to fix it.
Here is the situation: IIci, hard drive was replaced with a SCSI2SD. We have a special card in the NUBUS slot which communicates with a motion control board which is attached externally. From everything I can see, the software is installed correctly on the IIci, and it starts up as expected. The problems start when the IIci starts communicating with motion control board. It appears to be sending the wrong instructions to the motion control board and as a result, the large machine it controls is exhibiting some odd behavior. I am using the same SCSI2SD setup on 2 IIsi that are attached to 2 other machines that are the same model as the one with the IIci in it, without issue.
Due to the bizarre behavior, we swapped the SCSI2SD IIci for an older one we have for back up with an ancient HDD in it. Same software, same NUBUS card, same motion board. The problems with the large machine disappeared. The only significant difference is the SCSI2SD. As I am running those two other machines on a SCSI2SD without issues, I am reluctant to focus on the SCSI2SD as the problem, especially since it boots the way it is supposed to, and starts up the software the way it is supposed to.
Could it possibly be the NUBUS slot? Considering that the boards are the same and the strange behavior ceases to exist when installed and attached to another IIci, I thought it would be worth asking how to determine if that is indeed the problem, and how to tell what can be done to fix it.
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