xbas132.hex	old OS
xbas208.hex	latest OS without Tempo lock
xbas209.hex	latest OS with Tempo lock
xbsx209.hex	latest SX OS with Tempo lock (requires hardware update, too)


XBase09 ROM updates can be burnt yourself...the hex files are in the download area
of the jomox website.

2x 27C512 (-120ns minimum speed) or 2x 27C256 are required. 
If the unit is an older one, there might be UV erasable chips in it. 
In this case, just remove the sticker from the windows and erase them with a UV lamp and reprogram them.
The hex file has to be split up in even/odd bytes to obtain High byte/Low byte
chips. In case they are mistaken, nothing works,  but no damadge occurs. 
Every better electronics store has a burn service or there is certainly
someone on the newsgroups who has a programmer:)

Installation instructions are on the website in the manuals section.