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SERIAL - EXTENDED COMMUNICATION PORT CONTROL (CONVERTIBLE,PS)

AH = 05h
AL = function
00h read modem control register
Return:
BL = modem control register (see #00334)
AH = status
01h write modem control register
BL = modem control register (see #00334)
Return:
AX = status.
DX = port number

Note: Also supported by ArtiCom

See Also: AH=00h - AH=1Fh - AX=8000h"ARTICOM" - AH=FBh

Bitfields for modem control register:

Bit(s)  Description     (Table 00334)
0      data terminal ready
1      request to send
2      OUT1
3      OUT2
4      LOOP
5-7    reserved

Category: Serial I/O - Int 14h - S

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