| bits 16 |
| org 100h |
| |
| jmp start |
| |
| shuffle_start: |
| push 0xB800 |
| pop es |
| mov cx, 80*24*2 |
| mov ax, 'AA' |
| xor di, di |
| rep stosw |
| .lbl: jmp .lbl |
| shuffle_end: |
| nop |
| shuffle_len equ (shuffle_end - shuffle_start + 1) |
| |
| start: |
| ; calculate physical address of shuffled part |
| xor eax, eax |
| push ds |
| pop ax |
| shl eax, 4 |
| add ax, shuffle_start |
| mov dword [source], eax |
| |
| mov ax, 0012h |
| mov di, shuffle_descriptors |
| mov cx, num_shuffle_descriptors |
| mov ebp, 0x7c00 |
| int 22h |
| int3 |
| |
| shuffle_descriptors: |
| dd 0x7C00 |
| source: dd 0 |
| dd shuffle_len |
| |
| num_shuffle_descriptors equ 1 |
