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Developer tools · #msdos
Load relocatable MS-DOS drivers and TSRs into Upper Memory Blocks with DEVICEHIGH and LOADHIGH after enabling UMBs to free conventional memory below 640 KB.
Learn how MS‑DOS uses CONFIG.SYS and AUTOEXEC.BAT to load drivers and set environment, with a concrete example, trade‑offs, and a safe‑change checklist.
Explore the engineering trade-offs of MS-DOS FAT16, specifically how cluster sizing affects disk capacity versus internal fragmentation and slack space.
Avoid silent failures in MS-DOS automation by using COPY /B for binary integrity and explicit ERRORLEVEL checks to ensure your backups actually completed.
Learn how to resolve 'Insufficient memory' errors in MS-DOS by managing the 640KB conventional memory limit using HIMEM.SYS, EMM386.EXE, and UMB relocation.
The BACKUP and RESTORE utilities in MS-DOS 6.22 are used to archive file data and directory structures into sequential .BAK files. While these tools maintain standard file metadata, behavior varies when restoring archives to disks with different FAT sizes (such as transitioning from 16-bit to 32-bit FAT). There is uncertainty regarding how the RESTORE comman