os9 for pismo

The original MacOS9 version would be correct & harder to locate.

A full installer (retail) for MacOS9.1 could be a better match; if not

9.2.1. The later or last available media such as 9.2.2 may be nice.

WeLoveMacs among a few other resellers may list such items, but

some of them are only listings; without a reliable inventory stock...

And the amazon-affiliated resellers have spotty or non-availability.

From Pismo/FW window in MacTracker.ca application via G4 Mini Mac:

There are a few present Mac users who have or had the Pismo 400/500

G3 FW powerbook; not sure how many still have working examples...

The LowEndMac used to be a source some years back -- now they are

mostly source of names to search for who's still in vintage Mac business.

Some of their user groups listings go to google groups, & many are stale.

{A few listings such as http://www.headgapstore.com/ may be helpful if

you were to contact such examples to ask if they have any more info.

A search such as duck-duck-go using words 'pismo' MacOS9.1, etc

may yield dogpiles of results to sift through. I just tried that awhile ago.}

Hopefully you'll get some traction on this topic; certainly not mainstream.

Good luck & happy trails! 🙂

The Pismo didn't ship with a retail version MacOS9.0; and shipped with a required ROM build.

The full retail installer 9.1+ media CD could build the system per each supported hardware from

the disc, with later updates from servers. ~ However those bits may be found on other archives

than Apple server; some of their old software archive site URLs had changed so may be gone...

Been awhile since I last installed a stand-alone MacOS9.1 or later. With properly prepared HDD

and correct formatting, it is possible to copy a working boot-ready system from another mac or

from an archive. This isn't possible with later Mac OS X. {A drag-drop copy allows some latitude.}

And with an OS X machine, you may be able to extract MacOS9.x parts from original orphaned

media discs for use in other devices. Those parts can be used to restore & run original hardware.

A software utility by name of Pacifist had been great for partial re-installs from original media.

As it only works in OS X, (not sure if updated for latest X) it runs free indefinitely in demo-mode.

Because this area is outside usual suggestion, the recommendation is retail discs of the era, as

the original part numbered restore install CD media or DVD media would be rarer & cost; also

a resulting first supported system would not be able to use most later archival software.

For non-system games an example of some place to look for software may be here; providing

they have been orphaned, outside the realm of intellectual property rules. Some links will fail.

Sorry for not exactly answering your question with specific detailed clarity.

And I'm offline more than on; especially when online w/ local interruptions.

Best hunting when locating suitable software from reliable sources... and compatible hardware,

as to keep the vintage obsolete Mac functionally alive. Batteries may be rebuilt. Power adapters

replacement may be matched in output. You may be able to use a 'flash memory card' as an SSD.

Good luck & happy trails! 🙂