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| author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
|---|---|---|
| committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
| commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
| tree | 65ca85f13617aee1dce474596800950f266a456c /roms/ipxe/src/tests/comboot/shuffle-simple.asm | |
| download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip | |
Diffstat (limited to 'roms/ipxe/src/tests/comboot/shuffle-simple.asm')
| -rw-r--r-- | roms/ipxe/src/tests/comboot/shuffle-simple.asm | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/roms/ipxe/src/tests/comboot/shuffle-simple.asm b/roms/ipxe/src/tests/comboot/shuffle-simple.asm new file mode 100644 index 00000000..efc7d9b4 --- /dev/null +++ b/roms/ipxe/src/tests/comboot/shuffle-simple.asm @@ -0,0 +1,40 @@ + 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 + |