Welcome to dosemu2!
    Build 2.0pre9-dev-20260520-4680-g849a11e06
E:\>ldebug verrbug.bin
&; Welcome to lDebug!
AFORMAT installed.
EXTNAME installed.
-u 100 l bxcx
29AD:0100 90                nop
29AD:0101 90                nop
29AD:0102 90                nop
29AD:0103 90                nop
29AD:0104 D1750B            shl     word [di+0B], 1
29AD:0107 0F00E3            verr    bx
29AD:010A 90                nop
29AD:010B 90                nop
29AD:010C B8004C            mov     ax, 4C00
29AD:010F CD21              int     21
-t
AX=0000 BX=0000 CX=0011 DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=29AD ES=29AD SS=29AD CS=29AD IP=0101 NV UP EI PL ZR NA PE NC
29AD:0101 90                nop
-
AX=0000 BX=0000 CX=0011 DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=29AD ES=29AD SS=29AD CS=29AD IP=0102 NV UP EI PL ZR NA PE NC
29AD:0102 90                nop
-
AX=0000 BX=0000 CX=0011 DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=29AD ES=29AD SS=29AD CS=29AD IP=0103 NV UP EI PL ZR NA PE NC
29AD:0103 90                nop
-
AX=0000 BX=0000 CX=0011 DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=29AD ES=29AD SS=29AD CS=29AD IP=0104 NV UP EI PL ZR NA PE NC
29AD:0104 D1750B            shl     word [di+0B], 1                DS:000B=DC56
-
Invalid opcode
AX=0000 BX=0000 CX=0011 DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=29AD ES=29AD SS=29AD CS=29AD IP=0104 NV UP EI PL ZR NA PE NC
29AD:0104 D1750B            shl     word [di+0B], 1                DS:000B=DC56
-
Invalid opcode
AX=0000 BX=0000 CX=0011 DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=29AD ES=29AD SS=29AD CS=29AD IP=0104 NV UP EI PL ZR NA PE NC
29AD:0104 D1750B            shl     word [di+0B], 1                DS:000B=DC56
-