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Installing the Board
3-35
3.5.3.3. Floppy
Disk
Interface
Signal
Pin Assignation
Description
FD:DRVEN 0-1#
E7, A8
Drive 0-1 density select
FD:INDEX# B8
Index
FD:MTR 0-1#
C8, A9
Motor 0-1 enable
FD:DS 0-1#
E8, D8
Drive 0-1 select
FD:DIR# B9
Direction
FD:STEP# C9
Step
pulse
FD:WDATA#
D9
Write disk data
FD:WGATE# E9
Write
gate
FD:TRK0# A10
Track
0
FD:WRTPRT# B10
Write
protected
FD:RDATA#
C10
Read disk data
FD:HDSEL# D10
Head
select
FD-DSKCHG# E10
Disk
change
3.5.3.4. Serial
Port
2
Signal
Pin Assignation
Description
COM2:DCD
A11
Data Carrier Detect
COM2:RXD C11
Receive
Data
COM2:DSR
D11
Data Set Ready
COM2:TXD E11
Transmit
Data
COM2:RTS
A12
Ready To Send
COM2:CTS
B12
Clear To Send
COM2:RI C12
Ring
Indicator
COM2:DTR E12
Data
Terminal
Ready
3.5.3.5. Serial
Port
1
Signal
Pin Assignation
Description
COM1:DCD
A13
Data Carrier Detect
COM1:RXD C13
Receive
Data
COM1:DSR
D13
Data Set Ready
COM1:TXD E13
Transmit
Data
COM1:RTS
A14
Ready To Send
COM1:CTS
B14
Clear To Send
COM1:RI C14
Ring
Indicator
COM1:DTR E14
Data
Terminal
Ready
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