DOS startup values assumed [edited 15/09/2014] src : http://www.fysnet.net/yourhelp.htm by Benjamin "Fys" Lunt src : http://corkami.googlecode.com/svn/wiki/InitialValues.wiki by Ange "corkami" Albertini src : http://pferrie.host22.com/misc/lowlevel12.htm by Peter "Qkumba" Ferrie Brand/Version AX BX CX DX SI DI BP SP Flags * MS DOS 1.25 (OEM ?) 0000h CS 02CFh 03F6h 0F2Bh 0FC9h 00C6h xxxx 0282h Toshiba MS DOS 2.11 /R2A20US 0000h 0000h 00FFh CS 0100h 0100h 4322h FFFEh 0746h MS DOS 3.20, 3.30, & 3.30a 0000h 0000h 00FFh CS 0100h FFFEh 0882h FFFEh xx02h MS DOS 4.00, 4.01, & 4.01a 0000h 0000h 00FFh CS 0100h FFFEh 091Ch** FFFEh ? MS DOS 5.0a 0000h 0000h 00FFh CS 0100h FFFEh 091Ch** FFFEh 7202h * MS DOS 6.00 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFCh xx02h MS DOS 6.22 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh xx02h MS DOS 7.10 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFCh 7286h MS Windows 95a & OSR2.1 0000h 0000h 00FFh CS 0100h FFFEh 091Ch** FFFEh ? * MS Windows 95b & 95c 0000h 0000h 00FFh CS 0100h FFFEh 0912h** FFFEh ? * MS Windows 98 0000h 0000h 00FFh CS 0100h FFFEh 0912h** FFFEh ? MS Windows 98 (DOS license only) 0000h 0000h 00FFh CS 0100h FFFEh 0912h** FFFEh 7246h * MS Windows 98SE 0000h 0000h 00FFh CS 0100h FFFEh 0912h** FFFEh 3202h * MS Windows 98SE (Boot to DOS) 0000h 0000h 00FFh CS 0100h FFFEh 0912h** FFFEh 7202h * MS Windows ME 0000h 0000h 00FFh CS 0100h FFFEh 0912h** FFFEh ? MS Windows NT 4 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh ? MS Windows 2000 Pro 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh ? * MS Windows XP Home 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh 3202h * MS Windows XP Pro 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh 3202h * MS Windows Server 2000 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh 3202h MS Windows Server 2003 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh 7202h MS Windows NT4 Server 0000h 0000h 00FFh CS 0100h FFFEh 09xxh FFFEh 3202h IBM DOS 1.10 (1981-2) 0000h 0307h 02C1h 03EEh 0F1Bh 0FB9h 00BFh FFFDh ? * IBM DOS 3.30 (1987) 0000h 0000h 00FFh CS 0100h FFFEh 0882h FFFEh ? IBM PC DOS 1.00 0000h CS 02B1h 03FBh 08CEh 0960h 0200h FFEBh ? IBM PC DOS 1.10 0000h CS 02C1h 03EEh 0F1Bh 0FB9h 00BFh FFEDh ? IBM PC DOS 2.00 & 2.10 0000h 0000h 00FFh CS 0100h 0100h 0000h FFEEh ? IBM PC DOS 3.00 0000h 0000h 00FFh CS 0100h 0100h 0081h FFEEh ? IBM PC DOS 3.10, 3.20, & 3.30 0000h 0000h 00FFh CS 0100h FFFEh 0882h FFEEh ? IBM PC DOS 4.00 & 4.01 0000h 0000h 00FFh CS 0100h FFFEh 091Ch FFFEh ? IBM PC DOS 5.00, 5.00.1a, & 5.02 0000h 0000h 00FFh CS 0100h FFFEh 091Ch FFFEh ? IBM PC DOS 6.10 & 6.30 0000h 0000h 00FFh CS 0100h FFFEh 091Ch FFFEh ? IBM PC DOS 7.00 & 7.00r1 (PC-DOS 2000) 0000h 0000h 00FFh CS 0100h FFFEh 091Ch FFFEh ? PC-MOS/386 1.02, 3.00, 5.01 0000h 0000h 00A5h 0000h xxxxh 0000h 0000h FFEEh ? DR DOS 1.0 ? ? ? ? ? ? ? ? ? DR DOS Plus 1.20 0000h 0000h 0000h 0000h 0000h 0000h 0000h FFECh ? DR Concurrent DOS 386 2.00 0000h 0000h 0000h 0000h 0000h 0000h 0000h FFFEh ? DR Concurrent DOS XM 6.00 and 6.21 0000h 0000h 0000h 0000h 0000h 0000h 0000h FFFCh 7202h DR DOS 3.40 & 3.41 0000h 0000h 0000h 0000h 0000h 0000h 0882h FFFEh ? DR DOS 5.00 & 5.10 0000h 0000h 0000h 0000h 0000h 0000h 0882h FFFEh ? DR DOS 6.00 0000h 0000h 0000h 0000h 0000h 0000h 0882h FFFEh ? DR DOS 6.22 ? ? ? ? ? ? ? ? ? DR DOS 7.00 0000h 0000h CS CS 0100h FFFEh 0D7Ah FFFEh ? DR DOS 7.01 (Open Source) 0000h 0000h CS CS 0100h FFFEh 0D8Ch FFFEh ? DR DOS 7.02 0000h 0000h CS CS 0100h FFFEh 17DAh FFFEh ? DR DOS 7.03 0000h 0000h CS CS 0100h FFFEh 17D6 FFFEh ? DR DOS 8.00 0000h 0000h CS CS 0100h FFFEh 17DAh FFFCh 3246h DR DOS 8.10 0000h 0000h CS CS 0100h FFFEh 0D7Ch FFFCh 3246h DR Multiuser DOS Gold 7.22 0000h 0000h 0000h 0000h 0000h 0000h 0882h FFFEh ? Datalight ROM DOS 7.1 r2 0000h 0000h 0000h 0000h 0000h 0000h 0000h FFFEh ? * FDOS 6.22 0000h 0000h 00FFh CS 0100h FFFCh 0000h FFFCh ? FreeDOS Alpha 5 & Beta 1-6 FFFFh 0000h 0000h 0000h 0000h 0000h 0000h FFFEh ? FreeDOS Beta 7 & 8 0000h 0000h 0000h 0000h 0000h 0000h 0000h FFFEh ? FreeDOS Beta 8 & 9 rev 5 (Kernel 1.1.35) 0000h 0000h 00FFh CS 0100h FFFEh 091Eh FFFCh 3202h FreeDOS 1.00 and 1.10 0000h 0000h 00FFh CS 0100h FFFEh 091Eh FFFCh 0202h IMS Multiuser DOS 7.10 0000h 0000h 0000h 0000h 0000h 0000h 0882h FFFEh ? MoeDOS Beta 1 FFFFh 0000h 0000h 0000h 0000h 0000h 0000h FFFEh ? PTSDOS 6.70, 7.00 beta, 2000, & 2000 Pro 0000h 0000h xxxxh CS 0100h FFFCh 0000h FFFCh ? Real32 7.92a 0000h 0000h 0000h 0000h 0000h 0000h 0882h FFFEh ? RxDOS 7.1.5 & 7.2 beta 0000h 0000h 00A5h 0000h 0000h 0000h 0882h FFFEh ? Wendin-DOS 2.11 0000h 0000h 0000h D304h 0000h 0000h 0882h FFFCh ? Any other brand? ? ? ? ? ? ? ? ? ? =DOS= ==XP== * general registers || Flags || DI || SI || BP || SP || BX || DX || CX || AX || || 3202 || fffe || 0100 || 091e || fffe || 0000 || 06bc || 00ff || 0000 || * selectors || CS || DS || ES || FS || SS || GS || || 06bc || 06bc || 06bc || 0000 || 06bc || 0000 || ===+ Debug=== * general registers || Flags || DI || SI || BP || SP || BX || DX || CX || AX || || 7202 || 0000 || 0000 || 0000 || fffe || 0000 || 0000 || 01d6 || 0000 || * selectors || CS || DS || ES || FS || SS || GS || || 0cb5 || 0cb5 || 0cb5 || 0000 || 0cb5 || 0000 || ==DOSBox 0.74== * general registers || Flags || DI || SI || BP || SP || BX || DX || CX || AX || || 7202 || fffe || 0100|| 091c|| fffe || 0000||0192 || 00ff || 0000 || * selectors || CS || DS || ES || FS || SS || GS || || 0192 || 0192 || 0192 || 0000 || 0192 || 0000 ||