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1 
; for information on PS2 mouse/keyboard programming
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2 
; refer to http://www.computer-engineering.org/ps2mouse/
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3 
; and http://www.computer-engineering.org/ps2keyboard/
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4 
; respectively
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6 
MouseSearch_PS2:
 1 
MouseSearch_PS2:
7 
        jmp .begin
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	jmp	MouseSearch_PS2_begin
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 3 
 
- 
 
 4 
mouse_error equ MouseSearch_PS2_begin.error
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8 
 
 5 
 
9 
.kb_cmd_c:
 6 
 kb_cmd_c:
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	call	kb_cmd
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 8 
	jmp	check_kbd
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 9 
 
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 10 
 kb_write_c:
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 11 
	call	kb_write
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	jmp	check_kbd
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 13 
 
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 14 
 kb_read_c:
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	call	kb_read
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 16 
	;jmp	check_kbd
10 
        call    kb_cmd
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11 
.check:
 18 
 check_kbd:
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        cmp     ah, 1
 19 
	cmp	ah, 1
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        je      @f
 20 
	je	mouse_error
14 
        ret
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15 
@@:
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16 
        add     esp, 4  ; return address
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 21 
	ret
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 22 
 
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 23 
uglobal
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 24 
  mouse_cmd_byte   db 0
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 25 
  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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 29 
endg
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 30 
 
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 31 
 
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 32 
 mouse_cmd:
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 33 
	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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        jmp     .DataInputError
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	call	kb_cmd_c
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	mov	al, [mouse_cmd_byte]
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 39 
	call	kb_write_c
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 40 
 
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 41 
	call	mouse_read
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 43 
	cmp	al, 0xFA	; ack
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	jne	.noack
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.kb_write_c:
 45 
	ret
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 46 
   .noack:
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 47 
	cmp	al, 0xFE	; resend
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 48 
	jne	.noresend
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	dec	[mouse_nr_resends]
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 50 
	jnz	.resend
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 51 
   .noresend:
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20 
        call    kb_write
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	jmp	mouse_error
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 54 
 
21 
        jmp     .check
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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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 60 
	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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.kb_read_c:
 66 
   .fin:
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        call    kb_read
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	ret
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        jmp     .check
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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 71 
MouseSearch_PS2_begin:
27 
;--------------------------------------------
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	pushad
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.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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        mov     bl, 0xAD	; disable keyboard interface
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        call    .kb_cmd_c
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36 
 
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        mov     bl, 0xd4        ; to mouse
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        call    kb_cmd_c
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        call    .kb_cmd_c
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39 
        mov     al, 0xFF        ; reset
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        mov     bl, 0xA8	; enable mouse interface
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        call    .kb_write_c
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        call    kb_cmd_c
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        call    .kb_read_c
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 82 
	mov	al, 0xFF	; reset
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        cmp     al, 0xFA        ; ack
 83 
	call	mouse_cmd
43 
        jne     .no_ack
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44 
 
 85 
	; now the mouse is in Reset Mode
45 
        ; now the mouse is in Reset Mode
 86 
	; get the Basic Assurance Test completion code
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46 
        ; get the Basic Assurance Test completion code
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	call	mouse_read
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47 
        call    .kb_read_c
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	cmp	al, 0xAA
48 
        cmp     al, 0xAA
 89 
	jne	.error		; dead mouse
49 
        jne     .dead_mouse
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50 
        ; get device ID
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	; get device ID
51 
        call    .kb_read_c
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	call	mouse_read
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        cmp     al, 0x00
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	cmp	al, 0x00
53 
        jne     .unknown_device
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	jne	.error		; unknown device
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 95 
 
55 
        ; reset completed successfully
 96 
	; reset completed successfully
56 
 
 97 
 
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57 
        ; enable mouse interrupt - IRQ12
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58 
        mov     bl, 0x20        ; read command byte
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59 
        call    .kb_cmd_c
 98 
	; enable mouse interrupt - IRQ12
60 
        call    .kb_read_c
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61 
        or      al, 10b         ; set mouse IRQ bit
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62 
        push    eax
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        mov     bl, 0x60        ; write command byte
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        call    .kb_cmd_c
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65 
        pop     eax
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66 
        call    .kb_write_c
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67 
 
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68 
        mov     bl, 0xd4        ; to mouse
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69 
        call    .kb_cmd_c
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        mov     al, 0xf4        ; enable data reporting
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71 
        call    .kb_write_c
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72 
        call    .kb_read_c
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73 
        cmp     al, 0xFA
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74 
        jne     .no_ack
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75 
 
 - 
 
76 
;       jmp     @f
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77 
;.set_sample_rate:
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78 
;       push    eax
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79 
;       mov     bl, 0xd4        ; to mouse
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80 
;       call    .kb_cmd_c
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81 
;       mov     al, 0xF3        ; set sample rate
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82 
;       call    .kb_write_c
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83 
;       call    .kb_read_c      ; ack
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84 
;       pop     eax
 99 
	mov	bl, 0x20	; read command byte
85 
;       call    .kb_write_c
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86 
;       call    .kb_read_c      ; ack
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87 
; @@:
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88 
;       mov     eax, 200
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89 
;       call    .set_sample_rate
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90 
;       mov     eax, 100
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91 
;       call    .set_sample_rate
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92 
;       mov     eax, 80
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93 
;       call    .set_sample_rate
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94 
;       mov     bl, 0xd4
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Line 95... Line 100...
95 
;       call    .kb_cmd_c
 100 
	call	kb_cmd_c
96 
;       mov     al, 0xF2        ; read device type
 101 
	call	kb_read_c
97 
;       call    .kb_write_c
 102 
	or	al, 10b
Line 98... Line 103...
98 
;       call    .kb_read_c      ; ack
 103 
	push	eax
99 
;       call    .kb_read_c      ; mouse ID
 104 
	mov	bl, 0x60	; write command byte
Line 100... Line 105...
100 
;       cmp     al, 0x03
 105 
	call	kb_cmd_c
Line 101... Line -...
101 
;       jne     .no_scroll
 - 
 
102 
;       mov     [ps2_mouse_scroll], 1
 106 
	pop	eax
103 
;       ; it'll send 4-byte packets instead of 3-byte ones
 - 
 
104 
;       ; the last byte of a packet represents z-axis movement
 107 
	call	kb_write_c
105 
; .no_scroll:
 108 
 
106 
 
 109 
	mov	al, 0xF4	; enable data reporting
107 
        mov     [ps2_mouse_detected], 1
 110 
	call	mouse_cmd
108 
        mov     bl, 0xAE        ; enable keyboard interface
 111 
 
109 
        call    .kb_cmd_c
 112 
	mov	[ps2_mouse_detected], 1