Specifications

Connectors
EPC-100 Hardware Reference C-7
EIDE (Primary) Connector
The Primary EIDE Connector is a male 44-pin right-angle header. If an optional hard
disk drive is installed, it is installed on the primary channel. A slave drive may be
attached also using a ribbon cable (user supplied). The optional hard disk is 2.5”
style using power supplied by pins 41-44 of the connector. If you wish to connect a
40-pin connector, omit these power supply lines. The pins and signals are defined in
the following table:
Pin Signal Pin Signal
1 ~RST 2 GND
3D7 4 D8
5D6 6 D9
7 D5 8 D10
9 D4 10 D11
11 D3 12 D12
13 D2 14 D13
15 D1 16 D14
17 D0 18 D15
19 GND 20
N.C.
21 DRQ 22 GND
23 ~IOW 24 GND
25 ~IOR 26 GND
27 IORDY 28 PPU
29 ~DAK 30 GND
31 IRQ 32 IOCS16
33 A1 34
N.C.
35 A0 36 A2
37 ~CS0 38 ~CS1
39 ACT 40 GND
41 Vcc 42 Vcc
43 GND 44 GND
Table C-9. Primary EIDE Connector