ROM files structure

[VELESOFT]

+ Service ROM:

- Gluk Reset Service - for Pentagon;
- Kramis - for KAY;
- MOA Shadow Monitor - for Scorpion.

And any info about way to connect this rom to low 16kB ?
After press NMI only ?
After reset only ?
Via OUT command ?

KAY, Pentagon:

0 - Service
1 - TR_DOS
2 - SOS128
3 - SOS48

After reset is set service rom ?
After NMI jump CPU to service rom or to NMI code in TRDOS rom ?

Scorpion:

0 - SOS128
1 - SOS48
2 - Service
3 - TR_DOS

After reset is set SOS128 rom ?
What abou NMI function ?