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build multiple disk images, and console to vid & serial
[eightysix]
/
kern
/
src
/
startup.asm
1
; second stage boot loader C startup
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cpu 8086
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bits 16
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section .startup
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; memory reserved at the top of the kernel segment for the stack
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STACKSZ equ 4096
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extern kmain
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extern _bss_start
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extern _bss_size
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global _start
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_start:
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; TODO floppy off if necessary
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; move stack to the top of the kernel segment
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xor ax, ax
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mov sp, ax
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mov ds, ax
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mov es, ax
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mov ss, ax
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; zero .bss
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mov di, _bss_start
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mov cx, _bss_size
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shr cx, 1
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rep stosw
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call kmain
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hang: hlt
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jmp hang
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; vi:set ts=8 sts=8 sw=8 ft=nasm: