Lynx EPM-4 User Manual

One IDE interface is available to connect up to two IDE devices, such as hard disks, CD-ROM 
drives or CompactFlash (CF) media. Use CMOS Setup to specify the drive parameters of the 
attached drives.  
 
An activity indication LED is provided on the EPM-4. The yellow LED of D5 (See page 22) will 
show that activity is detected on the IDE interface. 
 
A 2mm 44-pin connector (J6) and a CF socket (J5) are provide on the board. Jumper V3 
determines if the CF media plugged into J5 is the IDE Master or slave (see Table 2). 

The IDE port is a simple interface compatible with PIO mode 0.  

Cable length must be 18" or less to maintain proper signal integrity. The grounds in 
this connector should not be used to carry motor current. 

1 

HRST* 

Host Reset 

Reset signal from CPU 

 

2 Ground Ground 

Ground 

 

3 

IDE7 

DATA 7 

Data bit 7 

 

4 

ID8 

DATA 8 

Data bit 8 

 

5 

ID6 

DATA 6 

Data bit 6 

 

6 

ID9 

DATA 9 

Data bit 9 

 

7 

ID5 

DATA 5 

Data bit 5 

 

8 

ID10 

DATA 10 

Data bit 10 

 

9 

ID4 

DATA 4 

Data bit 4 

 

10 

ID11 

DATA 11 

Data bit 11 

 

11 

ID3 

DATA 3 

Data bit 3 

 

12 

ID12 

DATA 12 

Data bit 12 

 

13 

ID2 

DATA 2 

Data bit 2 

 

14 

ID13 

DATA 13 

Data bit 13 

 

15 

ID1 

DATA 1 

Data bit 1 

 

16 

ID14 

DATA 14 

Data bit 14 

 

17 

ID0 

DATA 0 

Data bit 0 

 

18 

ID15 

DATA 15 

Data bit 15 

 

19 Ground  Ground 

Ground 

 

20 NC 

NC 

No 

connection 

 

21 IDEDRQ IDEDRQ 

DMA/Request 

 

22 Ground  Ground 

Ground 

 

23 

IOWR* 

HOST IOW* 

I/O write 

 

24 Ground  Ground 

Ground 

 

25 

IORD* 

HOST IOR* 

I/O read 

 

26 Ground  Ground 

Ground 

 

27 RDY 

Ready 

Wait 

control 

 

28 

HAEN 

ALE 

Address latch enable 

 

29 IDEDACK 

IDEACK DMA/Ack. 

 

30 Ground  Ground 

Ground 

 

31 HINT 

HOST 

IRQ10  IRQ10 

 

32 

XI16* 

HOST IOCS16* 

Drive register enabled 

 

33 

PA1 

HOST ADDR1 

Address bit 1 

 

34 NC 

NC 

No 

connection 

 

35 

PA0 

HOST ADDR0 

Address bit 0 

 

36 

PA2 

HOST ADDR2 

Address bit 2 

 

37 

ECS0* 

HOST CS0* 

Reg. Access chip select 0 

 

38 

ECS1* 

HOST CS1* 

Reg. Access chip select 1 

 

39 

NC 

NC  

No connection 

 

40 Ground  Ground 

Ground 

 

41 5V 

Power 

Power 

 

42 5V 

Power 

Power 

 

43 Ground  Ground 

Ground 

 

44 NC 

NC 

No 

connection