Date: 2008-01-01 15:00:05
On 2007-12-31, at 19:54, Jim Brain wrote: > As stated before, I'd prefer to see the drive contain a std IDE boot > sector A little nitpicking - we probably all know what you mean but I wouldn't call it "IDE boot sector" or "IDE partition scheme" as you called it before. I believe the proper name is "PC-BIOS partition scheme" and "MBR". IDE can use _any_ partition scheme. > (with partition info), and put this stuff at the sector noted by the > partition info. > On the system-info sector, I'd be happy to look at 0x83, FAT, > IDEDOS, etc. to come up with a common FS-boot block if you want. Sounds good. >> My LBA system can support 256 and 512 bytes sized sectors: if the >> MS bit of the 4th byte of the link is set, then this sector is the >> last sector of a file. The first byte, in case of a 512-bytes sized >> sector the second byte as well, tells the system how many bytes of >> this sector are used. >> > I'm assuming you're talking bit 31 of the link, right? Hehe, that > means, of course, that one cannot use a sector above 1TB :-) no > worries here. The only practical way we'll get there is if someone > creates a partition on a >1TB disk near the end. 1TB disks being so > common and all, in PATA format... We should start buying PATA harddrives with capacities lower than 1TB just like *NOW* - otherwise we may not be able to find a suitable drive for our (Ruud's) device available on the market when we decide we want one.. ;-) >> I started with removing references to the second drive. I also want >> to remove all references to the disk ID. As I cannot swap a disk, >> why would we need a disk ID? Showing the directory, the first line >> will display: > On the disk, I think that is fine. However, I would still leave a > spot on the DIRectory block for the ID and DOS-type (2A), in case > someone wants to modify them. >> 0 "DISKNAME " X-IDE That's quite similar to what IDE64 does. >> >> 'DISKNAME' can be changed. Formatting of the disk can be done with >> and without the ID option. With ID the system only accepts the >> characters 'ID'. This because formatting a real disk will take >> quite some time. You can compare it with the quick option for DOS >> format. >> >> When writing this, I already removed the write protection routines. >> But it just occurred to me it could come in handy. Your oppinion, >> please! I think it may not be needed all too often but I'd remove it only when the available space become limiting - In other words - keep it now and remove along with those you start removing when you run out of space. > I'm not sure I understand this. You mean for "locked" files (>PRG) > and all? I _think_ Ruud was about routines that handle write protection on the disk, right? Message was sent through the cbm-hackers mailing list
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