Classic Mac OS debugging output: Difference between revisions
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If you want a log of this output, you should hook your machine up to the local network, then run this, replacing the IP address with whatever is available for the machine to use: |
If you want a log of this output, you should hook your machine up to the local network, then run this, replacing the IP address with whatever is available for the machine to use: |
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dev /packages |
dev /packages/telnet |
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" enet:telnet,10.42.0.10" io |
" enet:telnet,10.42.0.10" io |
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Revision as of 04:33, 26 September 2025
You can make the Classic Mac OS dump a bunch of debugging output to Open Firmware during boot and sometimes the screen after boot.
To do this, open Open Firmware during boot with Command-Option-O-F and enter dev / 3013FFF encode-int " AAPL,debug" property. Then, boot with mac-boot.
If you want a log of this output, you should hook your machine up to the local network, then run this, replacing the IP address with whatever is available for the machine to use:
dev /packages/telnet " enet:telnet,10.42.0.10" io
Then connect to your machine via Telnet before booting.
Notes
- This does not work on a tray-loading iMac G3 because
/packages/telnetdoes not exist. - The screen will become blank after connecting from the client machine.
