- Released with the 16-bit 6MHz (overclocked to 8-9MHz) 80286
IBM PC AT, 1984.
- OEM IBM Corporation and various other manufacturers.
- Added support for 40ms 20Mb hard disk, holds 56 standard 360K
double-density floppies of information.
- Added support for 'high capacity' (high density) 1.2Mb disk
- Added 16-bit FAT entries to minimize slack space on hard
- Added extended error reporting for DOS functions.
- Added DOS functions 3dH through 62H and INT 24H.
- DOS function 4fH (Find Next File) requires you to keep DS:DX
pointing to the information from a 4eH (Find First File)
- DOS function 30H modifies BX and CX.
- The three 16-bit words at the end of the BPB are
- Lets you run a program by specifying a path in the
- Stored computer setup information in CMOS chip.
- Future support of Local-Area-Networks (LAN) begun, IBM.
- Commands introduced:
- Commands enhanced:
- Extremely buggy:
- Batch file parsing problems.
- DOS environment problems.
- Network support nonfunctional.