In a message dated 5/20/99 8:42:31 PM Eastern Daylight Time, McBorder@aol.com writes: > if you call _convop1 and op1 equals 5 will A,H or L contain the 5 > and if it is a word ( 65535 < ) will hl =op1 > the asm studio documentation is incorrect on that definition. OP1 is stored only in the a register.