Unitech MR350MKII manual Read stdaux COM2 RS-232 port, Write stdaux COM2 RS-232 port

DL = 8-bit data

Returned Values: None

void TS_stdout(unsigned char ch)

{

regs.h.ah= 2; regs.h.dl= ch; int86(0x21,®s,®s); return;

}

03 Read stdaux (COM2 RS-232 port)

No check on control keys (ESC)

Entry Parameters:	AH = 03
Returned Values:	AL = 8-bit data

unsigned char TS_stdaux_in()

{

regs.h.ah= 3; int86(0x21,®s,®s); return(regs.h.al);

}

04 Write stdaux (COM2 RS-232 port)

Entry Parameters:	AH = 04
	DL = 8-bit data
Returned Values:	None

void TS_stdaux_out(unsigned char ch)

{

regs.h.ah= 4; regs.h.dl= ch; int86(0x21,®s,®s); return;

}

06 Read / Write stdin or return 0 if none is ready

Entry Parameters:	AH = 06
	DL = 0~0xFE ; Write this character to stdout
	FF	; Read stdin
Returned Values:	For Write stdin : none
	For Read stdin
	if char ready, Zero = clear
		AL = 8-bit data

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