Once again, the binary and source don't quite agree, so I've gone with the binary. The binary stores in location 0000, so beware. The source copy uses an on-page temporary instead. The source doesn't compile correctly with the cross assembler, however. The line *.-1 177+1 does not get you to the next page; it assembles as if you'd written *.-1;177+1 There are also a versional differences at 01150 and 01336. dec-8e-apsta/pstd1 and dec-8e-atiha/tihd2 are quite similar. Vince