68kMLA Classic Interface

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SCSI port power
Posted by: beachycove on 2017-02-18 07:02:32
I've been tinkering again with my Color Classic, putting an LC575 with full 68040 and a Comm Slot plus 64 mb ram in the little thing. For years it's had an LC550 board in there, but I decided just to see what difference an 040 made in usage.

Connecting an external drive to the SCSI port, however, led to peculiar behaviour: the green power LED flickered constantly, as if the power were marginal. The drive was also not recognized.

Does a drive connected to the rear SCSI port draw power in a quantity that would explain this behaviour? I would have thought the additional power required would be marginal, given the external power supply in the drive itself.

Posted by: CelGen on 2017-02-18 08:58:36
The bus itself doesn't consume power but the termination power does however it is a very small amount.

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