Code:
BOOTSEG =0x07c0
entry start
start:
jmpi go,BOOTSEG
go: mov ax ,cs
mov ds,ax
mov es ,ax
mov [msg1+17],ah
mov cx,#20
mov dx,#0x1004
mov bx,#0x00c
mov bp,#msg1
mov ax,#0x1301
int 0x10
loop0: jmp loop0
msg1: .ascii "Loading system..."
.byte 13,10
org 510
.word 0xAA55
I want to know why we should use "jmpi go,BOOTSEG"?
I think when the first sector is read into memory,it is placed in 07c0:0000h.
If the directive "jmpi go,BOOTSEG" is not existed,the next directive is "mov ax ,cs"
And when the directive "jmpi go,BOOTSEG" is existed ,the program would jump to 07c0:go . The next directive is "mov ax ,cs" too!
I want to know does the directive "jmpi go,BOOTSEG" make any sense?
This is a Boot Sector written by as86,but I can't understand some directives
