Powerbook G3 PDQ : Prevent boot from SCSI (HDI30)

CedsRepairs
Tue, 07 Mar 2023 21:18:43 +0000

Hey,

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I've been asking the same question on 68KMLA and we haven't found a solution.

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I'm trying to connect a G3 PDQ to a PB100 thru Target Mode.

On the PB100 end, all is good. I've got the proper connectors etc

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On the G3 PDQ end, the problem I have is that the G3 wants to boot from SCSI whatever I do.

Hitting "D" does not help (does nothing)

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A lot of documentation about open firmware and keys to hold during boot time is incorrect on the internet.

This is an old world mac, I can enter open firwamre ( ctrl/opt/O/F) but the command "multi-boot" does not exist.

Holding "D" doesn't seem to exist

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There seems to be no way to prevent a G3 to boot from SCSI if you ever connect it to a SCSI drive, which makes no sense to me...

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Any help/advice appreciated.

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PowerPC Macs