Webcall WaitToXmit mov al, 60h out 64h, al call WaitToXmit mov al, 45h out 60h, al ; Okay, execute an INT 9 routine so the BIOS (or whoever) can read the key ; we just stuffed into the keyboard controller. Since we've masked INT 9 ; at the interrupt controller, there will be no interrupt coming along from ; the key we shoved in the buffer. WebMay 18, 2009 · Somebody sends you a parcel (strikes a key), and sometime later the postman arrives at your door (it arrives in the keyboard controller - port 60h). However, you are down the shops, and unable to receive it at the moment. So I (the int 9 handler) take it off the postman, and temporarily store it on a shelf (the keyboard buffer).
Operand Types and Addressing - University of Hawaiʻi
WebAnswer to Solved 2 Al (s) + 60H (aq) ? 3? (g) + Al-Og (s) This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. http://computer-programming-forum.com/45-asm/1d268ee09c320a6b.htm hieroglyphics strip
Asm, Clearing keyboard-buffer
WebApr 21, 2015 · in al, 60h mov di, tail mov buffer[di], al inc tail and tail, 0fh mov ax, tail cmp head, ax jne _1 inc head and head, 0fh _1: in al, 61h or al, 80h ... and al, 0fh cmp al, 10 sbb al, 69h das mov dh, 02h xchg ax, dx int 21h loop _3 mov ax, 0900h lea dx, ENDL int 21h popa mov sp, bp pop bp ret out_hex endp exit: cli mov ax, 2509h ... WebDec 15, 2010 · in al, 60h test ah, 80h jz key_down ; check for the few keys you care if they're up or down ; else, ignore key_down: ; check for the few keys you care if they're up or down ; if so, set a bit somewhere to keep track of 'em ; if not, check for "modifiers" (is shift key down?) ; look it up ; stuff it in keyboard buffer Webout dx,al;out1应该是周期为60s的方波，60*1s mov al,60h mov dx,cnt0+1 out dx,al mov dx,cnt0+3 mov al,1001 0001b;计数器1低8位方式0 bcd out dx,al;一天有24个小时，当一天结束后，可通过申请中断，结束 mov al,24h mov al, 00h out 42h,al mov al,20h out 42h,al;2000初值（十进制） 8．用8253组成一个实时 ... how far has nep been implemented