Unitech MR350MKII manual Read host port, Output data, Check if Busy-port

{

regs.h.ah= 0x1C; regs.h.al= status; regs.h.bh= 9; int86(0x21,®s,®s);

	}
5F	Read host port
	Entry Parameters:	AH = 0x5F
	Returned Values:	DS:DX = buffer pointer
		AL = 0	;output succeed
		1	;no data

int TC_str_I(unsigned char *str,int wait)

{

do { regs.h.ah=0x5F; segregs.ds = FP_SEG(str); regs.x.dx = FP_OFF(str); int86x(0x21,®s,®s,&segregs);

}while (wait && regs.h.al); return(regs.h.al);

	}
60	Output data
	Entry parameters:	AH = 0x60
		DS:DX = buffer pointer
	Returned Values:	AL = 0	;output succeed
		1	;buffer busy now

int TC_str_O(unsigned char *str,int wait)

{

do { regs.h.ah=0x60; segregs.ds = FP_SEG(str); regs.x.dx = FP_OFF(str); int86x(0x21,®s,®s,&segregs);

}while (wait && regs.h.al); return(regs.h.al);

}

61 Check if Busy-port

Entry Parameters: AH = 0x61

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