29 lines
433 B
NASM
29 lines
433 B
NASM
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heap_size:
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dw 0x0100
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heap_init:
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push ax ; byte value (0)
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push cx ; loop counter
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push di ; target ptr
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xor ax, ax
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mov cx, [heap_size]
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mov di, heap
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rep stosb ; rep makes this loop cx times, incrementing di, writing al
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pop di
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pop cx
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pop ax
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ret
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; in ax number of bytes to alloc
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; out ds:di
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malloc:
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push dx ; length of block index
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or ax,0x0F
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inc ax
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mov dx, 0x100
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mov bp, heap
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int 0x2E
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pop dx
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ret
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