What do I need in order to write an FST for GS/OS, or am I not permitted to write them being that would modify that system? I know they can't be disassembled in the usual way because they are some type of Object Module. If anyone has any experience with FSTs, I'd appreciate any help in this area. Thank you, Bill @ GarberStreet Enterprizez };-) Web Site - http://garberstreet.netfirms.com Email - willy4SPAM6pa@comXcast.net Remove - SPAM and X to contact me --- This email ain't infected, dude! Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.522 / Virus Database: 320 - Release Date: 9/29/03 As others have said, Apple never published the FST specifications. The word from insiders was that the specification was never actually finalized, and in fact Apple actually had to change parts of the rest of GS/OS for very new FST that they wrote! Along with many other people, I made attempts at disassembling the MSDOS FST. With a decent OMF disassembler like ORCA/Disasm you can make what seems like a lot of progress very quickly. A lot of the entry code is not too different from a device driver or toolset, and some of the specific disk format stuff (eg. for MS-DOS) is not too hard to spot, but you are still left with large areas of "unknown" code which make (and this is the worst part of all) *undocumented* calls into the rest of GS/OS. I have some pre-release GS/OS documentation that all-too-briefly described a few of the calls, but in fact far from helping, it actually discouraged me. :-( -- Peter Watson -- Write to MSDOS disks on the Apple IIgs? -- Impossible! ;-) "Bill Garber" wrote in message news:Xzudnc0Z4PvT7x6iU-KYgg@comcast.com... > > What do I need in order to write an FST for GS/OS, > or am I not permitted to write them being that would > modify that system? I know they can't be disassembled > in the usual way because they are some type of Object > Module. If anyone has any experience with FSTs, I'd > appreciate any help in this area. > > Thank you, > > Bill @ GarberStreet Enterprizez };-) > Web Site - http://garberstreet.netfirms.com > Email - willy4SPAM6pa@comXcast.net > Remove - SPAM and X to contact me > > --- > This email ain't infected, dude! > > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.522 / Virus Database: 320 - Release Date: 9/29/03