Toshiba T1200 User Manual page 162

d) Mode control register (I/O address
=
063H)
This register is set as follows
by
writing the data to
the address 063H, or by resetting the power on.
BIT
State
Bit Bit Description
0
PC latch data (PCO-3) is selected as read data of PCO-3.
0
1
SW data is selected as read data of PCO-3.
0
PC latch data (PC4-7) is selected as read data of PC4-7.
3
1
Status information is selected as read data of PC4-7.
0
PA latch data is selected as read data of PA.
4
1
KB data is selected as read data of PA.
0
Not used
7 1
Enable to set mode control register. Resets PortA, PortB, PortC.
A - 14