194 lines
12 KiB
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194 lines
12 KiB
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<TITLE>Int 14/AH=81h
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<META NAME="Description" CONTENT="
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Int 14/AH=81h - COMM-DRV - EXTENDED INITIALIZATION -
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AH = 81h
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BX:DI - port control block (see #00367)
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DX = port number
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Return: AH = line status register (see #00304)
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error if bit 7 set
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AL = modem status register (see #00305)
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Program: COMM-DRV is a universal serial communications driver by Willies'
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Computer Software Company, which supports standard INT 14 and
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FOSSIL calls as well as its own interfaces
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Note: AX=8001h should be called first to fill in the port control block
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<h2>Int 14/AH=81h
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<h3><font color=#C00040>COMM-DRV - EXTENDED INITIALIZATION</font></h3>
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<PRE>
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AH = 81h
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BX:DI -> port control block <a href="rb-1027.htm#Table367" tppabs="http://www.ctyme.com/intr/rb-1027.htm#Table367">(see #00367)</a>
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DX = port number<br>
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<p><b>Return:</b><br>AH = line status register (see #00304)
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error if bit 7 set
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AL = modem status register <a href="rb-0821.htm#Table305" tppabs="http://www.ctyme.com/intr/rb-0821.htm#Table305">(see #00305)</a>
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</PRE>
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<p><b>Program:</b>
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COMM-DRV is a universal serial communications driver by Willies'
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Computer Software Company, which supports standard INT 14 and
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FOSSIL calls as well as its own interfaces
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<p><b>Note:</b>
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AX=8001h should be called first to fill in the port control block
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<p><b>See Also:</b>
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<a href="rb-0811.htm" tppabs="http://www.ctyme.com/intr/rb-0811.htm">AH=00h</a> - <a href="rb-1011.htm" tppabs="http://www.ctyme.com/intr/rb-1011.htm">AX=8001h</a> - <a href="rb-1034.htm" tppabs="http://www.ctyme.com/intr/rb-1034.htm">AH=82h"COMM-DRV"</a> - <a href="rb-1043.htm" tppabs="http://www.ctyme.com/intr/rb-1043.htm">AH=86h"C
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<PRE>
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<p>
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Format of COMM-DRV port control block:
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<a name=table367></a>
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Offset Type Description (Table 00367)
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00h WORD port IO address
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02h WORD port IRQ
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04h WORD baud rate
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06h WORD parity
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08h WORD data bits
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0Ah WORD stop bits
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0Ch WORD break status (0000h off)
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0Eh WORD flow control protocol
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10h BYTE input block
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11h BYTE output block
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12h WORD low threshold
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14h WORD high threshold
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16h WORD segment of buffer
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18h WORD offset of buffer
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1Ah WORD input buffer length
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1Ch WORD output buffer length
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1Eh BYTE auxiliary address
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1Fh BYTE spare
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20h 4 WORDs spares
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</PRE>
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<p>
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<b>Category: <a href="cat-038.htm" tppabs="http://www.ctyme.com/intr/cat-038.htm">
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Serial I/O</a>
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Int 14h</a>
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C</a>
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