132 lines
2.1 KiB
PHP
132 lines
2.1 KiB
PHP
MouseSearch_PS2:
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jmp MouseSearch_PS2_begin
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mouse_error equ MouseSearch_PS2_begin.error
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kb_cmd_c:
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call kb_cmd
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jmp check_kbd
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kb_write_c:
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call kb_write
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jmp check_kbd
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kb_read_c:
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call kb_read
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;jmp check_kbd
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check_kbd:
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cmp ah, 1
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je mouse_error
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ret
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uglobal
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mouse_cmd_byte db 0
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mouse_nr_tries db 0
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mouse_nr_resends db 0
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mouse_error_esp dd 0
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endg
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mouse_cmd:
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mov [mouse_cmd_byte], al
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mov [mouse_nr_resends], 5
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.resend:
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mov bl, 0xd4
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call kb_cmd_c
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mov al, [mouse_cmd_byte]
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call kb_write_c
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call mouse_read
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cmp al, 0xFA ; ack
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jne .noack
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ret
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.noack:
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cmp al, 0xFE ; resend
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jne .noresend
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dec [mouse_nr_resends]
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jnz .resend
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.noresend:
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jmp mouse_error
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mouse_read:
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mov [mouse_nr_tries], 100
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.repeat:
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call kb_read
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cmp ah, 1
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jne .fin
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mov esi, 10
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call delay_ms
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dec [mouse_nr_tries]
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jnz .repeat
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jmp mouse_error
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.fin:
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ret
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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MouseSearch_PS2_begin:
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pushad
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mov [mouse_error_esp], esp
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mov bl, 0xAD ; disable keyboard interface
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call kb_cmd_c
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mov bl, 0xA8 ; enable mouse interface
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call kb_cmd_c
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mov al, 0xFF ; reset
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call mouse_cmd
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; now the mouse is in Reset Mode
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; get the Basic Assurance Test completion code
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call mouse_read
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cmp al, 0xAA
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jne .error ; dead mouse
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; get device ID
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call mouse_read
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cmp al, 0x00
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jne .error ; unknown device
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; reset completed successfully
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; enable mouse interrupt - IRQ12
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mov bl, 0x20 ; read command byte
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call kb_cmd_c
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call kb_read_c
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or al, 10b
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push eax
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mov bl, 0x60 ; write command byte
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call kb_cmd_c
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pop eax
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call kb_write_c
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mov al, 0xF4 ; enable data reporting
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call mouse_cmd
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mov [ps2_mouse_detected], 1
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mov bl, 0xAE ; enable keyboard interface
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call kb_cmd
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mov esi, boot_setmouse_type
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call boot_log
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jmp .finish
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.error:
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mov esp, [mouse_error_esp] ; clear stack frame
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mov [ps2_mouse_detected], 0
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mov bl, 0xA7 ; disable mouse interface
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call kb_cmd
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mov bl, 0xAE ; enable keyboard interface
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call kb_cmd
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.finish:
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popad
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