Multiple RAD devices on AMIGA 500 with extra fast ram

[matthey]

Is it possible to have more than 1 rad devices on amiga 500 with extra fast ram, and if so, how can you achieve that?

Probably, but maybe not with early versions of AmigaOS. Multiple RAD devices (that I can diskcopy to) work on my AmigaOS 3.x machine in a similar way to what you tried. The old RAD may not have supported more than 1 device or there may be bugs in diskcopy or the RAD device. A possible solutions would be to try a different recoverable ram device off of Aminet or upgrade to a newer version of the AmigaOS. Many games will not work out of RAD (NODOS/custom boot loaders and/or with on disk copy protection) but OS friendly games will of which many adventure games would be classified.

[matthey]

Depends. If  they stupidly are hard coded to DF0: then it won't work ( the older the more probable). But for instance F1 GP  could be put anywhere and assigned.

A few games like F-18, the "df0:" strings in the program could be edited to "f18:" or similar and then assigned. Some games will work to HD install them to the big RAD drive. Renaming the RAD volume name to "Work" will make some installs easier or keep them from failing. Some of the HD installs were poorly written.

You're blazing a seldom explored trail, don't give up!  It is amazing to me that very few have embraced the RAD: as a way to dramatically improve performance.

It's not new just forgotten. Many smart Amiga users used a RAD back in the day especially programmers. I bet a 4 MB RAD would cut the compile time of SAS/C in 1/2 back then and the Amiga was probably one of the fastest C development systems on this side of 5 grand because of it.