Ted Ashton ([log in to unmask]) wrote: : Can anyone give me information on the EDIT PB instruction? I'm assuming it : existed on the Series II and I know that it's octal 20470 and that you : push onto the stack the address of a "program", a destination pointer, a : data pointer (all word addresses, I believe) and a 0 and then : ASSEMBLE(CON %20470) : Ted Almost, they are byte address. It is documented in the Machine Instruction Set manual, 30000-90022. Printed in 2/80. 10 pages. You could compile with COBOLII and decompile the edit subprogram.