Multiport configured as a floppy drive controller – IBM BDM-610000049 User Manual
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CMX158886 cpuModule
BDM-610000049
Rev G
multiPort Configured as a Floppy Drive Controller
The multiPort (CN6) can be configured to be a floppy drive controller. This can be configured in the BIOS Setup
under Integrated Peripherals. For more information on configuring the multiPort in the BIOS Setup, refer to
page 66
Table 29 shows the pin assignments to connect a floppy drive to the multiPort.
Table 29
multiPort Connector Floppy Pinout (CN6)
1
1. Signals marked with (#) are active low.
CN6 Pin
Function
DB-25
Floppy Drive Pin
1
DS0#
1
14
2
DR0
14
2
3
INDEX#
2
8
2
2. These signals must be pulled to 5V with separate 470 Ohm resistors.
4
HDSEL#
15 32
5
TRK0#
3 26
6
DIR#
16
18
7
WRTPRT#
4 28
8
STEP#
17 20
9
RDATA#
5
30
10
GND
18 —
11
DSKCHG
6
34
12
GND
19 odd
pins
13
—
7
—
14
GND
20 odd
pins
15
MTR0#
8 10
16
GND
21 odd
pins
17
—
9 —
18
GND
22 odd
pins
19
DS1#
10 12
20
GND
23 odd
pins
21
MTR1#
11 16
22
GND
24 odd
pins
23
WDATA#
12 22
24
GND
25 odd
pins
25
WGATE#
13 24
26
+5 V
—
—