Toshiba T3200 User Manual page 179

Pin
I/O Signal Name
Description
This signal defines the formatting mode of the
disk.
77
0
MINI
When this signal is low;
9 sectors/ track
When this signal is high;
15 sectors/ track
78
Vcc
+ 5V
79
0
WRDATA
Write data to the FDD. This signal is active high.
The precompensation is given to this write data.
Select signal to the external HDC.
80 0 HDDCS This signal is active (low) when the I/O address is
170H-177H.
This signal controls the direction of printer data
port.
When this signal is low;
81 0 PRTDIR
External
~
Internal.
When this signal is high;
Internal
~
External.
This function is ignored when it is in the external
FDD mode.
Each of PD7-PDO is a printer or parallel data IN
bus. When it is in the external FDD mode, each
82
I/O
PD7
bus is in the high impedance state.
When printer is connected, they are in the
output mode.
Printer data bus bit 7.
83 I/O
PD6
Printer data bus bit 6.
84
I/O PDS
Printer data bus bit
s.
85 I/O PD4 Printer data bus bit 4.
86 I/O PD3 Printer data bus bit 3.
87
I/O
PD2 Printer data bus bit 2.
88 I/O PD1 Printer data bus bit 1.
89 I/O PDO Printer data bus bit
o.
90 GND Ground
Printer select command. This signal is active
91
0
SLCTIN high. This signal is issued by the command to
address 372H.
Printer auto-feed command. This signal is active
92
0
AUTFD high, and is issued by the command to address
372H.
D-8