Kaypro 10 - SERIAL PORT ASSIGNMENTS

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SERIAL PORT ASSIGNMENTS
For Modem (serial channel A):
PORT 4 is the Z-80A SIO data port.
PORT 6 is the Z-80A SIO control and status port.
Received character available is obtained by testing bit 0 of the status port.
Transmit Buffer Empty is obtained by testing bit 2 of the status port. Other
details can be found in the Z-80A documentation available from Zilog.
The serial output is a 8-bit word with one start, one stop, and no parity.
Baud Rate Table
HEX #
o
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Baud Rate
50
75
110
134.5
150
300
600
1200
1800
2000
2400
3600
4800
7200
9600
19200
80
Note: The baud rate
will be 300 baud up or
when reset switch is
pressed.