Specifications

EPC-4 Hardware Reference
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44
6 DCD 20
7 Ground 7
8 RTS 5
Keyboard
The keyboard connector is a 6-pin DIN defined as
Pin Signal Pin Signal
1 Data 4 +5V
2 not used 5 Clock
3 Ground 6 not used
EXM Expansion Connector
The EXM expansion connector on the rear of the EPC is a 116-pin cardedge
connector. The mating connector is an AMP 650090-1 or equivalent. The connector
pin numbers are divided into the A side and the B side. Pins A1 through A58 are on
the component side of the board with pin A1 at the bottom of the board. Pins B1
through B58 are on the solder side of the board with pin B1 at the bottom of the
board. The pin assignments are listed in the tables below followed by signal
definitions.
A Row:
Pin Signal Pin Signal Pin Signal Pin Signal
A1 (unused) A16 IRQ12 A31 -DACK3 A45 SA13
A2 (reserved) A17 IRQ11 A32 -DACK2 A46 (key)
A3 +5V A18 IRQ7 A33 (reserved) A47 (key)
A4 +5V A19 IRQ5 A34 -DACK1 A48 SA11
A5 SD15 A20 +5V A35 -DACK0 A49 SA9
A6 SD13 A21 (reserved) A36 -SBHE A50 OSC
A7 SD11 A22 -IOCHK A37 +5V A51 SA7
A8 (unused) A23 DRQ6 A38 AEN A52 SA5
A9 SD9 A24 DRQ5 A39 SA23 A53 SA3
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8
1
2
3
4
5
6