mirror of
https://github.com/ichmagmaus111/ghostgram.git
synced 2026-07-17 04:57:18 +02:00
Ilya Laktyushin
32 lines
774 B
NASM
32 lines
774 B
NASM
[BITS 32]
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[MAP all]
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; This file is loaded as a DOS .COM file.
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[SEGMENT _TEXT start=0 vstart=100h]
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; shrink & relocate stack:
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mov sp, stack_ends ; NASM puts 460h here -
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; 9B0h is desired.
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mov bx, sp
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mov cl, 4
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shr bx, cl
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mov ah, 4Ah ; DOS resize mem.block
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int 21h
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[SEGMENT GATESEG align=1 follows=_TEXT vstart=0]
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; label to use for copying this segment at run-time.
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gate0cpy:
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dd 0
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; 32-bit ring-0 protected mode code that interacts
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; with the VMM (Win3.x/9x kernel). To be relocated
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; at run-time to memory dynamically allocated with
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; DPMI, and called through a call-gate from ring-3.
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; vstart=0 makes some calculations easier.
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; Reserve space for stack:
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[SEGMENT .bss follows=GATESEG align=16]
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resb 400h
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stack_ends:
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