Kaypro 10 - 1;0 Port Addresses

Port # (hex)
00
04
05
06
07
08
14
1/0 PORT ADDRESSES
Use and/or assignment
Baud rate for Modem (Write on Iy)
Writing a number between 0 and F
(hex - see preceding
table) to this
port will set the RS -232C baud rate.
RS-232C Serial Data. (R/W)
Data register
of the Z-80 SIO
Keyboard Data. (R/W)
Eight-bit
data from detachable
keyboard. See the following S-BASIC
program for an example of writing to
this port.
RS-232C Status . (R/W)
Control/status port for the Z-80A
SIO. See Zilog and Mostek
Microcomputer Data Books.
Keyboard
Control/Status
Baud Rate for Serial Printer
System Port. (R/W)
This port is used for system control.
The various bi ts are used for memory
bank selection, disk drive control ,
and printer handshaking .
BIT
o Drive A 0 = SELECT A
1 Dri
ve B 0 = SELECT B
2
Side One 0 = SIDE 1
3
PSTROB 0 = LOW
4 MTRON 0 = FLOPPY MOTOR ON
5 DDEN 0 = DOUBLE DENSITY
6 NO CONNECTION
7 BANK 0 = RAM SELECT
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