ck.asm

来自「用cy7c66113开发的HUB」· 汇编 代码 · 共 23 行

;-------------------------------------------------------------------------
; Detect PS2 (Every 1msec)
;-------------------------------------------------------------------------
PS2orUSB:
    ; Read PS2_CONNECT
    MOV     A, [p3_shadow]
    OR      A, PS2_CONNECT
    MOV     [p3_shadow], A
	IOWR    PS2_PORT
	
	;  
    IORD    PS2_PORT
    AND     A,PS2_CONNECT
    JZ      .USB

.PS2:
    SETBIT  PS2_CHK_FLAG,ck_flags
    RET
.USB:
    CLRBIT  PS2_CHK_FLAG,ck_flags
    RET