FYI: the USA version of the Hicom 300 is very different than the European (used by the rest of the world) Hicom 300. When Siemens joined into the ownership of the IBM/ROLM company in 1989, the European Hicom was re-engineered for the USA market by engineers in Boca Raton, Florida and Santa Clara, California. The result was new AMOs and new hardware for the USA. The HiPath 4000 project was referred to as "UNITY", to merge the two Hicom 300 platforms. For example, in the USA Hicom, Least Cost Routing was simplified, e.g. Euro-AMOs RICHT & LDAT were consolidated into USA AMO LROUT. The HiPath 4000 actually uses many of the European Hicom 300 AMOs, and a few AMOs from the US Hicom 300 (LDPLN, for example). So when someone seeks assistance for "Hicom 300" on this forum, it is a good idea to know which version is involved!!!
Anatrejo2000 has provided a very nice Euro-Hicom 300 document, but Jill5 (who appears to be a USA forum member) will probably not benefit from it because the AMOs ZAND, DIMSU, etc, are not valid on the USA Hicom 300. Jill5, if you know the HiPath 4000, then these AMOs may make sense. ZAND is "SYSDA" on the US Hicom, and "DIMSU" is DIMEN. There may be a file somewhere on the internet that will provide a complete cross-reference of these AMOs.
Good luck!