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Code: Select all

INT_0xC:		;COM1 (Serial Mouse) Interrupt Called.
	sti

	push dx
	push ax
	push si

	push cs
	pop ds

	mov	si, mouse
	call	Print_String	;Write a "M"

	mov al,0x20	;Make the interrupt vector happy, and
	out 0x20,al	;tell it this interrupt is done with its job ;-)

	pop si
	pop ax
	pop dx

	IRET

Code: Select all

mouse2:

		mov	si,0x3f8

		mov	dx,si		;SET DLAB ON
		add	dx,3
		mov	al,0x80
		out	dx,al
		nop

		mov	dx,si		;set Baud rate (low)
		mov	al,0x60
		out	dx,al
		nop
					;/* Default 0x03 =  38,400 BPS */
					;/*         0x01 = 115,200 BPS */
					;/*         0x02 =  57,600 BPS */
					;/*         0x06 =  19,200 BPS */
					;/*         0x0C =   9,600 BPS */
					;/*         0x18 =   4,800 BPS */
					;/*         0x30 =   2,400 BPS */
					;/*         0x60 =   1,200 BPS */

		mov	dx,si		;set Baud rate (high)
		inc	dx
		mov	al,0
		out	dx,al
		nop

		mov	dx,si		;8 Bits, No Parity, 1 Stop Bit
		add	dx,3
		mov	al,0x3
		out	dx,al
		nop

		mov	dx,si		;FIFO Control Register
		add	dx,4
		mov	al,0xb
		out	dx,al
		nop

		mov	dx,si		;Turn on DTR, RTS, and OUT2
		add	dx,2
		mov	al,0xc7
		out	dx,al
		nop

		mov	dx,si		;Interrupt when data received
		inc	dx
		mov	al,1
		out	dx,al
		nop

Code: Select all

INT_0xC:		;COM1 (Serial Mouse) Interrupt Called.

	pusha		;backup everything

	push cs
	pop ds

        mov dx,3fdh			;line status register.
        in al,dx
	sub dx,5
;	test al,2
;	jz @nooverrun		; jump if no overrun occured
;
;	in al,dx			; else flush receive buffer,
;	jmp @exitIRQh		;  and exit

;@nooverrun:
        in al,dx			;Receive the incoming byte.

	mov si, msgmouse
	call print_string	;Write a "M"

	mov al,0x20	;Make the interrupt vector happy, and
	out 0x20,al	;tell it this interrupt is done with its job ;-)

@exitIRQh:
	popa		;Put back everything how it was.
	IRET