[Coco] NitrOS-9 instant boot CoCo
robert.gault at worldnet.att.net
Sun Aug 5 17:56:00 EDT 2007
Roger Taylor wrote:
> I'm trying to gather the setups some of you OS-9/NitrOS-9 users have in
> place that allows you to hit the power button on your CoCo then have the
> OS-9 prompt within a few seconds, with no moving hard drives or MPI, or
> DriveWire cable (although that's a very nice idea).
> Can the SuperIDE interface do this, and if so, what add-ons are needed?
> What about a NItrOS-9 ROM that completely boots up from the ROM? If so,
> can this ROM be put on a 32 kByte EPROM and replace the CoCo 3 ROM.
> What about piggybacking an EPROM on the CoCo motherboard and clipping
> some pins on the old ROM? Anyone done this kind of hack to avoid the
> infamous killer desolder job?
The "problem" with booting from a ROM as Roger asks rather than a hard
drive, is that you are locked into at least a specific kernel. That
means cobbler and os9gen have lost some of their usefulness. It is
important to be able to make changes to the core OS-9/NitrOS-9 modules
at will as needed without needing to burn a new EPROM.
Using a CF card more easily reloaded with new code should be just as
good as booting from hard drive directly.
At the moment the size of a typical NitrOS-9 OS9Boot file plus kernel
is about 12.5K. It would certainly fit into a ROM. However, if you plan
to include the CMDS directory as well, forget it!
It is not enough to load just the OS9Boot file to run OS-9. You also
need all of the commands and software. Where would they be without some
type of drive system unless you use a very large CF card?
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