Re: int 0x13 utility

Am Wed, 26 Mar 2008 23:39:22 +0000 schrieb João Jerónimo:

Wolfgang Kern wrote:
But if you write your own HD-driver, the physical CHS-limit is:
16 heads, 255 sectors, 65536 tracks(cylinders), and this gives
us 267386880 sectors (= 127.5 GB).
So if the the hardware can handle it then it works almost like LBA28
(max= 128 GB), ...except for the unconvenient calculation needs.

But is this a DOS or a BIOS level driver?

If you write the driver for DOS it´s a DOS-driver, else if you write
it for your own OS maybe you can call it BIOS-driver?

Dirk

.

Relevant Pages

  • Re: int 0x13 utility
    ... 16 heads, 255 sectors, 65536 tracks, and this gives ... So if the the hardware can handle it then it works almost like LBA28 ... so bypassing all limits from DOS and BIOS int13. ...
    (comp.lang.asm.x86)
  • Re: DOS 3.3 disk usage
    ... I've been messing around with DOS 3.3, ... They use 6 _sectors_ on the disk, where each sector is 256 bytes. ... Still, your 1024 byte file consumes 1536 bytes of disk space though, i.e. ... apart from the actual file data. ...
    (comp.sys.apple2)
  • Re: atari 800xl emulator
    ... reset the pointers and then save it to a DOS file. ... you still don't have the D: handler to save it to a DOS ... Where'd you get the DOS.SYS to dump to sectors on a disk? ...
    (comp.sys.atari.8bit)
  • Re: Making disk images of NorthStar CP/M disks with Catweasel
    ... is to just write the data from the single density sectors ... I don't think you can make disks that will work correctly in mixed ... NS DOS accesses the MDS-AD put a "handler routine" on that specific ...
    (comp.os.cpm)
  • Re: atari 800xl emulator
    ... reset the pointers and then save it to a DOS file. ... you still don't have the D: handler to save it to a DOS ... Where'd you get the DOS.SYS to dump to sectors on a disk? ...
    (comp.sys.atari.8bit)