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386 MAX (originally 386 to the Max, later Qualitas MAX) is a computer memory manager for DOS-based personal computers. [1] It competed with Quarterdeck's QEMM memory manager. It was manufactured by Qualitas. BlueMax was a special version designed for the IBM PS/2 with ROM compression to get the most of the Upper Memory Blocks.
The specification allows use of up to 8 MB of RAM. Above Board packs up to 2 MB, and two Above Boards can coexist in the same system. A source estimated that 4 MB of RAM would yield about 500,000 cells in a spreadsheet. EMS is implemented with the expanded memory manager (EMM), a device driver supplied by the board manufacturer as a CONFIG.SYS ...
Hard drive: partition size max Native support: File systems Native support: floppy capacities 3.5" Native support: floppy capacities 5.25" Native support: floppy capacities 8.0" Integrated disk compression utility Native support: long file names 86-DOS 0.42-1.00 — FAT12; (CP/M 2 through RDCPM) — NorthStar 87.5 KB; Cromemco 90 KB
Both IBM and Microsoft chose 640 kibibytes (KiB) as the maximum amount of memory available to programs and reserved the remaining 384 KiB for video memory, the read-only memory of adapters on some video and network peripherals, and the system's BIOS. By 1985, some DOS applications were already hitting the memory limit, while much of reserved ...
In 2018, Microsoft released the source code for MS-DOS 1.25 and 2.0 on GitHub, with the source code for MS-DOS 4.00 being released in the same repository six years later. [ 3 ] [ 24 ] The purpose of this, according to Microsoft, is mainly for education and experimentation with historic operating systems and for new programmers to gain an ...
MSX-DOS and the extended BASIC with 3½-inch floppy disk support were simultaneously developed by Microsoft and ASCII Corporation as a software and hardware standard for the MSX home computer standard, to add disk capabilities to BASIC and to give the system a cheaper software medium than Memory Cartridges, and a more powerful storage system than cassette tape. [1]
In addition to bug fixes, DOS 2.0S featured improved NOTE/POINT support and the ability to automatically run an Atari executable file named AUTORUN.SYS. Since user memory was erased when DUP.SYS was loaded, an option to create a MEM.SAV file was added. This stored user memory in a temporary file (MEM.SAV) and restored it after DUP.SYS was unloaded.
CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems.It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system's DOS BIOS (typically residing in IBMBIO.COM or IO.SYS) during boot.