'''BOS''' (''Banked Operating System'') used on [[Vortex Expansions RAM card|expansions RAM]] card from [[Vortex]].
== Versions ==
There are 3 versions:
There are 3 versions :=== BOS 1.0 ===Initial release
==== BOS 1.0 ======== 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
* Cannot load files larger than 32 Kb from ramdisk in BASIC
==== BOS 2.1 ====Bugfix release.
Changes:
* Fix bug loading files larger than 32 Kb from ramdisk in BASIC
* [[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:Disc Operating System]] [[Category:Expansion ROM]] [[Category:Manual]]