73 lines
1.3 KiB
PHP
73 lines
1.3 KiB
PHP
;; File: kbd.inc
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;;
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;; Usefull links:
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;; - <https://wiki.osdev.org/PS/2_Keyboard>
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KBD_STATP = 0x64
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KBD_ATAP = 0x60
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KBS_DIB = 0x01
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;; function: kbd_probe
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;;
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;; Out:
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;; AL - 0 if not found
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kbd_probe:
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mov al, CMOS_INSTALLED_EQUIPMENT
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out CMOS_COMMAND, al
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in al, CMOS_DATA
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and al, 0x4
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ret
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kbd_init:
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call kbd_probe
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or al, al
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jz @f
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mov esi, szMsgKbdFound
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call klog
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@@:
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ret
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kbd_getc:
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in al, KBD_STATP
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and al, KBS_DIB
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jz @f
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in al, KBD_ATAP
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mov ah, al
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and ah, 0x80
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jnz @f
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mov edx, aKbdNormalMap
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movzx eax, al
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add edx, eax
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mov byte al, [edx]
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call cga_putc
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@@:
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ret
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kbd_irq:
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pusha
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mov al, PIC_EOI
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out PIC1_COMMAND, al
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call kbd_getc
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popa
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iret
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szMsgKbdFound db "KBD: found", 0
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aKbdNormalMap:
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db 0, 0x1B, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0'
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db '-', '=', 0x08, 0x09, 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i'
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db 'o', 'p', '[', ']', LF, 0, 'a', 's', 'd', 'f', 'g', 'h'
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db 'j', 'k', 'l', ';', "'", '`', 0, '\', 'z', 'x', 'c', 'v'
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db 'b', 'n', 'm', ',', '.', '/', 0, '*', 0, ' ', 0, 0
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db 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '7'
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db '8', '9', '-', '4', '5', '6', '+', '1', '2', '3', '0', '.'
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db 0, 0, 0, 0, 0, 0, 0, 0
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kbd_device:
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db 'kbd', 0, 0, 0, 0, 0
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dd kbd_init
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