Path: utzoo!attcan!uunet!portal!cup.portal.com!Thomas_E_Zerucha From: Thomas_E_Zerucha@cup.portal.com Newsgroups: comp.sys.atari.st Subject: Re: Bugs in new BETA ROMS? Message-ID: <8819@cup.portal.com> Date: 7 Sep 88 00:17:36 GMT References: <561@accelerator.eng.ohio-state.edu> <679@otto.lvsun.com> Organization: The Portal System (TM) Lines: 15 XPortal-User-Id: 1.1001.3273 I have just checked out exactly what MY PC wanted in the way of bytes to recognize an IBM disk, and as far as I know, Byte 0 has to be 0xEB, and byte 2 has to be 0x90 in the boot sector (from an 11/28/85 formatted disk on the ST). That's it. (The EB is a short jump to the real boot code, byte 1 would be the displacement; the 90 I have no idea about). You can try changing these with a sector editor. If your PC doesn't recognize this, then perhaps it is time you changed your BIOS. (Perhaps real release copies of both PC and ST software might help things - an article in the current "Computer Shopper" indicates problems with software from Sham Shui Po). (I am also not absolutely sure that *both* of the above bytes are necessary, it seemed to accept the disk after reporting an error with only 90H there, but that wasn't consistent).