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48 HMI-640S User's Manual
4.9.3 Floppy drive
Users can attach up to two floppy disk drives to the CPC-2245N via
a SODIMM socket. The CPC-2245N supports any combination of
5.25" (360 KB / 1.2 MB) and/or 3.5" (720 KB / 1.44/2.88 MB) drives.
The following table lists the pin assignments for the floppy disk
connector:
Table 4-9: Floppy drive connector
FDD connctr. CN3 FDD connector CN3
Pin Signal Pin Signal Pin Signal Pin Signal
1 GND 9 GND 2 High density 141 AUTOFD
3 GND 9 GND 4 N/C
5 GND 10 GND 6 N/C
7 GND 10 GND 8 Index 69 PD0
9 GND 11 GND 10 Motor enable A 66 PD6
11 GND 11 GND 12 Driver select B 64 ACK
13 GND 12 GND 14 Driver select A 143 PD7
15 GND 12 GND 16 Motor enable B 137 BUSY
17 GND 13 GND 18 Direction 71 INIT
19 GND 13 GND 20 Step pulse 72 SLCTIN
21 GND 14 GND 22 Write data 65 PE
23 GND 14 GND 24 Write enable 144 SLCT
25 GND 15 GND 26 Track 0 140 PD1
27 GND 15 GND 28 Write protect 68 PD2
29 GND 16 GND 30 Read data 139 PD3
31 GND 16 GND 32 Select head 142 ERR
33 GND 9 GND 34 Disk change 67 PD4