'''BOS''' (''Banked Operating System'') used on [[Vortex Expansions RAM card|expansions RAM]] card from [[Vortex]].
== Versions ==
There are 3 versions:
=== BOS (Banked Operating System) used on expansions RAM from [[Vortex]]1.0 ===Initial release
There are 3 versions === BOS 2.0 ===Changes:* Enable resizing of the first memory bank from 32 Kb to up to 64 Kb to prevent issues with large BASIC programs* Allow usage of ramdisk from within BASIC (was previously only usable in CP/M)* Allow user to set sizes of RAM floppy, printer spooler and BASIC RAM area
Bugs:* BOS 1.0Cannot load files larger than 32 Kb from ramdisk in BASIC * === BOS 2.01 ===Bugfix release. Changes:* BOS 2.1Fix bug loading files larger than 32 Kb from ramdisk in BASIC
== Manuals ==
* [[Media:Vortex SP 512 Kb (BOS 1.0) Manual.pdf|Vortex SP 512 Kb (BOS 1.0) Manual]] (pdf) {{DE}} (August 1985)
* [[Media:Vortex BOS 2.0 Manual.pdf|Vortex BOS 2.0 Manual]] (pdf) {{DE}} (10.11.1986)
* [[Media:Vortex RAM Expansions SP64-SP512 User Handbook (English) (Screens Microcomputer Distribution Ltd).pdf|Vortex RAM Expansions SP64-SP512 (BOS 1.0) User Handbook]] (pdf) {{EN}} (Oct 1985)
== Downloads ==
* [[Media:Bos10.zip|BOS10.zip]] - BOS v1.0 (ROM-image)* [[Media:BOS10ALT.ZIP|BOS10ALT.ZIP]] - BOS v1.0 (ROM-image (Alternative version)* [[Media:Bos21.zip|BOS21.zip]] - BOS v2.1 (ROM-image)* [[Media:BOS21_664.rom|BOS21_664.rom]] - BOS v2.1 for the 664 (ROM-image)
[[Category:PeripheralsDisc Operating System]] [[Category:Expansion ROM]] [[Category:Manual]]