
INSTALLATIONS
16 MB800 User’s Manual
Chip select 0 37 38 Chip select 1
Activity 39 40 Ground
FDD1: Floppy Drive Connector
FDD1 is a 34-pin header and will support up to 2.88MB floppy drives.
Signal Name Pin # Pin # Signal Name
Ground 1 2 RM/LC
Ground 3 4 No connect
Ground 5 6 No connect
Ground 7 8 Index
Ground 9 10 Motor enable 0
Ground 11 12 Drive select 1
Ground 13 14 Drive select 0
Ground 15 16 Motor enable 1
Ground 17 18 Direction
Ground 19 20 Step
Ground 21 22 Write data
Ground 23 24 Write gate
Ground 25 26 Track 00
Ground 27 28 Write protect
Ground 29 30 Read data
Ground 31 32 Side 1 select
FDD1
Ground 33 34 Diskette change
FAN1: CPU Fan Power Connector
FAN1 is a 3-pin header for the CPU fan. The fan must be a 12V fan.
Pin # Signal Name
1 Ground
2 +12V
3 Rotation detection
FAN2: System Fan Power Connector
FAN2 is a 3-pin header for the system fan. The fan must be a 12V fan.
Pin # Signal Name
1 Ground
2 +12V
3 Rotation detection
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