Jeff Blakeney writes: >Ewww, ick. I don't think I even have a copy of ProDOS v1.3 and I >didn't get an enhanced IIe until after I had a IIgs so I guess I never >learned that tidbit properly because it never affect me. Thanks for >the description of the bug. Here is the description as published in Open-Apple v3 n2 March 1987 page 3.12: ProDOS 8, version 1.3, released to developers in mid-January and mentioned here last month, mistakenly includes a BRA (branch always) machine language instruction in a critical piece of code. This is a significant problem, because BRA isn't supported by the original 6502 microprocessor. Consequently, this version of ProDOS causes bad things to happen when run on Apple II-Pluses and unenhanced IIes. If you BLOAD PRODOS,TSYS,A$2000, then the bad instruction appears at $4CCD. A BEQ (branch on equal) would work just as well here, so you can fix things with a POKE 19661,240 and a BSAVE PRODOS,TSYS,A$2000. I personally see no reason for anyone to be running any versions of ProDOS 8 other than v1.9 on 6502 equipped Apple IIs and v2.0.3 on 65C02 equipped systems. This way you get all the known bug fixes. -- David Wilson School of IT & CS, Uni of Wollongong, Australia