A2091 and CDROM issues

[Ral-Clan]

You cleaned the edge connector but did you clean the edge connector socket on the motherboard?  Wrap a thin piece of cloth around a credit card, put cleaning agent on the cloth and move it back and forth gently in the slot.

An A2091 might have problems with removable media drives if it doesn't have 7.0 ROMS and the latest Western Digital chip.

However, your errors sound more like possible termination errors.  Is the CD-ROM drive terminated?

Are the terminator blister packs still present near the SCSI connector on the A2091?  If not, you'll also need to install a terminator on the external DB-25 port of the A2091.

[Ral-Clan]

Termination on on the last item (HD is zero, CDROM is 3).  I know not what those blister packs look like.  There is no termination on the external port, so perhaps that is where my problem lies?

The resistor pack terminator on the A2091 will consist of three long, plastic looking things to the right and parallel to the SCSI connector on the A2091.  They are the three black looking things to the right of the connector in this photograph (RN1, RN2, RN3):

http://www.amiga-hardware.com/download_photos/a2091_2_big.jpg

If they are still there then the A2091 card is terminated.

Termination should be on the physical first and last item in the SCSI chain (i.e. the last item on the SCSI ribbon connector away from the controller) regardless of what SCSI ID you assign that device.

I.e. even if the CD-ROM drive was the last item on the Ribbon connector, it could still have any ID from 0 to 7, but it should have a terminator on it regardless.

I believe the A2091 uses SCSI device 7 for itself.