14b109ea24
modified: compiler/create_crosscompiler.sh deleted: notes modified: src/.gdb_history deleted: src/amd64_vol2.pdf modified: src/bootloader/bios_functions/bios_disk.asm modified: src/bootloader/bios_functions/print.asm modified: src/bootloader/bootloader.asm modified: src/bootloader/cpu_check.asm modified: src/bootloader/enter_kernel.asm deleted: src/bootloader/enter_kernel_backup modified: src/bootloader/gdt.asm deleted: src/bootloader/multicore.asm deleted: src/bootloader/notes new file: src/debug/gdbinit.gdb deleted: src/indigo_os modified: src/kernel/include/libc.h modified: src/kernel/include/paging.h modified: src/kernel/include/video.h modified: src/kernel/kernel.c modified: src/kernel/libs/acpi.c modified: src/kernel/libs/drivers/serial.c modified: src/kernel/libs/drivers/video.c modified: src/kernel/libs/libc.c modified: src/kernel/libs/page.c modified: src/link.ld modified: src/makefile new file: tools/README.md modified: tools/page/page.py
59 lines
789 B
NASM
59 lines
789 B
NASM
;TODO fix null problem, allow passing value insted of pointer
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bios_print:
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pusha
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mov ah, 0x0e
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.print_loop:
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mov al, [bx]
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cmp al, 0
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je .fini
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test cx, cx ; if cx is zero, ascii, otherwise hex string
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jne .print_hex
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int 0x10
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.print_hex_ret:
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inc bx
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jmp .print_loop
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.fini:
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mov al, 0xd
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int 0x10
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mov al, 0xa
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int 0x10
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popa
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ret
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.print_hex:
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mov al, '0'
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int 0x10
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mov al, 'x'
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int 0x10
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mov al, [bx]
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shr al, 4
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call .bios_print_nibble
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mov al, [bx]
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and al, 0x0f
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call .bios_print_nibble
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mov al, ' '
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int 0x10
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jmp .print_hex_ret
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.bios_print_nibble:
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cmp al, 9
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ja .print_hex_letter
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add al, 0x30
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int 0x10
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ret
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.print_hex_letter:
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add al, 0x57
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int 0x10
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ret
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