AX=FFFF BX=0000 CX=0B64 DX=0000 SP=4000 BP=0000 SI=0000 DI=0000
DS=PSP ES=PSP SS=STCK CS=CODE IP=0000 NV UP EI PL NZ NA PO NC
CODE0000: CALL SYS:0000
CODE0005: PUSH BP
CODE0006: MOV BP,SP
CODE0008: XOR AX,AX
CODE000A: CALL SYS:02CD
CODE000F: POP BP
CODE0010: XOR AX,AX
CODE0012: CALL SYS:0116