Some information on the Serial Port
the FORMAT for serial characters
PIN IDENTIFICATION on serial port connectors
the LINE STATUS, MODEM STATUS layout & REGISTER SETUP for BIOS CALLS
the INTERRUPT IDENTIFICATION layout
the REGISTERS I/O address block
MANY THANKS to the following sources for these Diagrams:
8088 Assembler Language Programming: The IBM PC by David Willen & Jeffrey Krantz (Howard W. Sams & Co., a division of Macmillan)
EL31P Homepage
