Ampro Corporation 486E - Manual (Page 44)

Little Board™/486e Technical Manual
2–28
Floppy Interface Configuration
The floppy interface is configured using SETUP to set the number and type of floppy drives
connected to the system. Refer to the SETUP section later in this chapter for details.
If the floppy interface is not used, disable it in SETUP. This frees its I/O addresses (3F0h - 3F7h),
DMA2, and IRQ6 for use by other peripherals installed on the PC/104 bus.
Floppy Interface Connector (J14)
Table 2–23 shows the pinout and signal definitions of the floppy disk interface connector, J14. The
pinout of J14 meets the AT standard for floppy drive cables. Table 2–24 shows the manufacturer’s
part numbers for mating connectors.
Table 2–23. Floppy Disk Interface Connector (J14)
Pin Signal Name Function In/Out
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1-33
RPM/-RWC
N/A
N/A
-IDX
-MO1
-DS2
-DS1
-MO2
-DIRC
-STEP
-WD
-WE
-TRKO
-WP
-RDD
-HS
-DCHG
(all odd)
Speed/Precomp
(Not used)
Key pin
Index Pulse
Motor On 1
Drive Select 2
Drive Select 1
Motor On 2
Direction Select
Step
Write Data
Write Enable
Track 0
Write Protect
Read Data
Head Select
Disk Change
Signal grounds
OUT
N/A
N/A
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
OUT
IN
N/A
Table 2–24. J14 Mating Connector
Connector Type Mating Connector
Ribbon 3M 3414-7600
Discrete Wire MOLEX Housing 22-55-2342
PIN 16-02-0103