.sect .text; .sect .rom; .sect .data; .sect .bss .define __lseek .sect .text __lseek: mov ax,19 push bp mov bp,sp push si push di mov di,10(bp) mov si,8(bp) mov cx,6(bp) mov bx,4(bp) call syscal pop di pop si pop bp jae 1f mov (_errno),ax mov ax,-1 mov dx,ax ret 1: mov dx,bx ret