C:\>ldebug
-a
2BC9:0100 mov ah, 80
2BC9:0102 int 21
2BC9:0104 nop
2BC9:0105 int3
2BC9:0106 nop
2BC9:0107
-di 21
int 21 B001:008C (IISP)
 --> F000:EAA1 (nonstandard IISP)
 --> 011C:109E
-g 11C:109E
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=011C IP=109E NV UP DI PL ZR NA PE NC
011C:109E 90                nop
-p
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=011C IP=109F NV UP DI PL ZR NA PE NC
011C:109F 90                nop
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=011C IP=10A0 NV UP DI PL ZR NA PE NC
011C:10A0 E8CC00            call    116F
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=011C IP=10A3 NV UP DI PL ZR NA PE NC
011C:10A3 2EFF2E6A10        jmp     far [cs:106A]             CS:106A=FDC8:40EB
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=FDC8 IP=40EB NV UP DI PL ZR NA PE NC
FDC8:40EB FA                cli
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=FDC8 IP=40EC NV UP DI PL ZR NA PE NC
FDC8:40EC 80FC6C            cmp     ah, 6C
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=FDC8 IP=40EF OV UP DI PL NZ AC PE NC
FDC8:40EF 77D2              ja      40C3                                jumping
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=FDC8 IP=40C3 OV UP DI PL NZ AC PE NC
FDC8:40C3 32C0              xor     al, modrm al
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFF8 BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=FDC8 IP=40C5 NV UP DI PL ZR NA PE NC
FDC8:40C5 CF                iret
-
AX=8000 BX=0000 CX=0000 DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=2BC9 ES=2BC9 SS=2BC9 CS=2BC9 IP=0104 NV UP EI PL ZR NA PE NC
2BC9:0104 90                nop
-