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Copyright 1991 David Jurgens |
INT 14,4 - Serial Port Extended Initialization (PS/2 & later systems)
AH = 04
AL = break setting
BH = parity setting
BL = stop bit setting
CH = word length setting
CL = baud rate setting
DX = zero based serial port number (0-3)
--- Break Setting ---
1 = break
0 = no break
----- Parity Setting ----- --- Stop Bit Setting ---
0 = no parity 0 = one stop bit
1 = odd parity 1 = 2 stop bits
2 = even parity 1½ if register CH=0
3 = stick parity odd (5 bit word length)
4 = stick parity even
-- Word Length Setting -- ---- Baud rate Setting ----
0 = 5 bits 0 = 110 5 = 2400
1 = 6 bits 1 = 150 6 = 4800
2 = 7 bits 2 = 300 7 = 9600
3 = 8 bits 3 = 600 8 = 19200
4 = 1200
on return:
AH = port status
AL = modem status
- for status bits see INT 14,STATUS
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| Esc or Alt-X to exit |
int 14,4 |
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