[weblacky]

Answer...NO PROM from Irix Only...maybe from Inst Miniroot...but I'd not chance it.

Okay...I've just re-read your entire thread...you still don't have a valid L1 dallas chip, the one you bought on eBay is wrong...period.

Everything you've done is still using the wrong chip, which means that it has the wrong memory layout, which means all of this is very likely because you CANNOT store valid BASEIO inventory settings at all.  You never obtained a working chip, you shoved "something" in the L1 dallas slot that claims DS1220 Compatibility.  But no one has ever proved that a simple DS1220 RTC can function in these machines correctly.

Looks like glitchwrks has released a replacement 3.3v RTC for Tezro now (perhaps not perfect, but functional): https://www.tindie.com/products/glitchwr...placement/

Your Ethernet BASEIO complaint and SCSI BASEIO complaint are part of a default inventory that is initialized into L1 NVRAM, I don't think you have a valid hardware inventory because your RTC chip memory layout isn't exactly like the required Tezro L1 RTC.  For the record, I've never heard of anybody successfully using a normal DS1220 (OEM or compatible chip) in any SGI and actually work.

Go get a known-working L1 RTC, then re-init everything...then we'll circle back here.