AstridRedfern
Member
- Joined
- Oct 19, 2022
- Messages
- 19
This post follows on from discussion in https://forum.vcfed.org/index.php?t...-gx-hardware-e-g-sparcstations.1240578/page-2 - in which @tokenalt mentioned that they couldn't run SunOS 4.1 or earlier on their 4C because it had PROM 2.X.
One of the places I went to in search of a PROM 1.X file was forums DOT sgi DOT sh. And a user (the owner and main admin, I think!) of those forums posted this quote from Discord chat:
(I don't know what OBP stands for. Maybe "onboard PROM".)
Does anyone know anything about this magic, this environment variable, and how to enable 1X compatibility mode? And are there any limitations to its compatibility? (that you know of.)
Thanks to anyone who can help,
Astrid.
One of the places I went to in search of a PROM 1.X file was forums DOT sgi DOT sh. And a user (the owner and main admin, I think!) of those forums posted this quote from Discord chat:
actually, you don't strictly need a version 1 .X OBP to run SunOS 4.0. There is some documented OBP magic you can use to enable 1.X compatibility on a 2.X OBP version. It is pretty much just an environment variable (that I currently forgot...).
(I don't know what OBP stands for. Maybe "onboard PROM".)
Does anyone know anything about this magic, this environment variable, and how to enable 1X compatibility mode? And are there any limitations to its compatibility? (that you know of.)
Thanks to anyone who can help,
Astrid.