The bug that delete background near the left border of the screen is caused by star shield routine at #0ED9.
If you want to try to use theses informations, beware in some version some code is not located in the same place.Theses informations has have been taken on from the Aldo Reset version and the original dump.
[[User:Fano|Fano]] 09:58, 19 November 2009 (UTC)
In Nicholas CAMPBELL and CNG versions, code seems to be offseted to -14 bytes.
In original code, the subprogram that load levels is located at #5B64.It gets level number at #719C ,compute track number track=((lvl-#30)*4)+8 and download the 3 tracks (#3600 bytes) at #C4AE so levels are located at track 8,4,12,16,20,24,28 and to finish it calls #8F2A to do loading.
[[User:Fano|Fano]] 13:08, 20 November 2009 (UTC)