BOS (Banked Operating System) used on expansions RAM card] from Vortex.
There are 3 versions :
- BOS 1.0
- BOS 2.0
- BOS 2.1
Manuals
- Vortex SP 512 Kb (BOS 1.0) Manual (pdf)
(August 1985) - Vortex BOS 2.0 Manual (pdf) (10.11.1986)
- Media:Vortex RAM Expansions SP64-SP512 User Handbook (English) (Screens Microcomputer Distribution Ltd).pdf (pdf)
(Oct 1985)
Downloads
- Media:Bos10.zip - BOS v1.0 ROM-image
- Media:BOS10ALT.ZIP - BOS v1.0 ROM-image (Alternative version)
- Media:Bos21.zip - BOS v2.1 ROM-image