ps2.inc

Cypress 的(鼠标+键盘)复合设备汇编源程序

;========================================================================
;   FILE: ps2.inc
;
;   This file contains ps2-specific delarations
;
;========================================================================
BAT_PASS:               equ 0aah
BAT_FAIL:               equ 055h


;status bits for ps2 command processor

PS2_RESEND:	            equ	1			
PS2_XMIT:	            equ	2			
PS2_RESEND_REQUESTED:   equ	4		
PS2_SCAN_KBD:	        equ	8			



PS2_ENABLED_INTERRUPTS:	equ	4	; 1msec interrupt enabled

;ps2 clock, data bits are D+ and D-

PS2_CLOCK_BIT:		equ	DP	;
PS2_DATA_BIT:		equ	DM	;


;PS2 response byte declarations
PS2_RSND:	    equ	0feh	;Resend response (request resend from host)
PS2_ACK:		equ	0fah	;ACK response
PS2_ECHO:		equ	0eeh	;ECHO response


PS2_SCAN_INTERVAL:	equ	4	;4msec between key scans

;define key types for scan set 3. These are carefully chosen to match
;the enumerations in the ps2-host commands 0xf7 - 0xfd (set all keys, and
;set key type).

TYPEMATIC:                      equ 0               
MAKE_BREAK:                     equ 1
MAKE:                           equ 2
TYPEMATIC_MAKE_BREAK:           equ 3

SCAN_SET_1:                     equ 1
SCAN_SET_2:                     equ 2
SCAN_SET_3:                     equ 3