Félicitation voilà du travail nickel propre !
Il existes des solutions permettant de mettre une pile boutton:
NVRAM/RTC replacement module for Falcon030 · centuriontech.eucenturiontech.euPlug-in replacement for original NVRAM chip in Atari Falcon030 computer. Designed to be compact, fully compatible with original bulky Dallas DS12887(A) chip. Additionally, it features conveniently placed 2p pinheader allowing you to easily reset NVRAM contents, if needed. Backed by a replaceble CR1220 coin cell battery (not included).
Sinon il faut faire de la chirurgie, il y a des liens ici:
http://christophe.bray.free.fr/informatique/falcon/pile_falcon/index.htm
Bon courage !
Vincent