Hi Peter, Bitsavers has an example for each of 16 & 32 bit Eclipse: http://bitsavers.org/pdf/dg/eclipse/014-000050-00_Eclipse_WCS_microPgmg_Nov74.pdf http://bitsavers.org/pdf/dg/mv10000/014-701003_MV10000_microgramming_May83.pdf Did you work in this area much yourself? Rgds Evan