56 lines
964 B
NASM
56 lines
964 B
NASM
%include "multiboot_header.asm"
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%include "x86_vram.asm"
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%define stack_size 0x1000
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section .bss
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stack resb stack_size ;define stack_size worth of uninitialized space
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section .data
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print_word db 'Hahaha',0
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section .text
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extern get_vram_offset
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extern c_entry
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global write_to_coord
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global boot
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mov esp, stack + stack_size ;stack is stack-size bytes higher than highest uninitialized memory
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xor ebp, ebp ; zero ebp
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jmp main
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main:
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push word BG.CYAN | ' ' ; repeatdly set cell to be black space
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call clear
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add esp, 2
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push dword BG.BLACK | FG.RED | 'A'
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push dword 0
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push dword 0
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call write_to_coord
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add esp, 12
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mov ecx, 0
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.loop:
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add ecx, 1
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cmp ecx, 5
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jne .loop
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push dword BG.BLACK | FG.YELLOW | FG.BRIGHT | 'Z'
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push dword 0
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push dword 24
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call write_to_coord
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add esp, 12
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call c_entry
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jmp halt
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halt:
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hlt
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jmp halt
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%include "x86_vram_functions.asm"
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