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