512K 3.9 ROM, how?

[kolla]

Why do you want it in ROM?

If you have OS3.9, I presume you have a hard drive? You can load workbench.library and icon.library to be boot resident from hard drive using LoadModule, and after that they will be there even if you boot from floppy, till you either remove them or power off.

[kolla]

You don't need to loadresident or loadmodule icon.library or workbench.library under 3.9.  If you need to boot an old game that tries to start workbench to launch it, you could be boned, but you could always softkick for those scenarios.

Well, if you have an A600 accelerator card that allows softkicking, I know my Apollo 630 is not easily softkicked.

[kolla]

mkick should work as long as you have fast ram. Whether it will cope with 1mb custom roms is another matter, but it should be possible in theory.

Nope, mkick does not work, and I only use 512kB kickstarts.

[kolla]

Even RemApollo doesn't work with the Apollo 630
(and yes, this 030 has MMU, I used it for OpenBSD once upon a time)

[kolla]

I'm curious - how do you switch kickstarts?