Omega CIO-CTR10 User Manual page 9

INSTALLING THE CIO-CTR IN THE COMPUTER
Turn the power off. Remove the cover of your computer. Please be careful not to dis-
lodge any of the cables installed in your computer as you slide the cover off.
Locate an empty expansion slot in your computer. If you are installing a CIO-CTR10,
it is best to locate two slots side by side. If you can create two side by side by moving
boards, do so.
From the rear of the computer, place the CIO-CTR10 in the right hand of the two
empty slots. This means that the empty slot is on the component side of the
CIO-CTR. Cabling will be easier if there is an empty slot on the component side of
the board.
Push the board firmly down into the expansion bus connector. If it is not seated fully
it may fail to work and could short circuit the PC bus power onto a PC bus signal.
This could damage the motherboard in your PC as well as the CIO-CTR. The CIO-
CTR connector is a male 37 pin 'D' type connector. All the signals from the 9513,
digital input, digital output and interrupt are accessible.The CTR10 has two of these
connectors, P1 and P2. The signals on both are identical.
CTR 2 IN 19
CTR 2 GATE 18
CTR 3 IN 17
CTR 3 GATE 16
CTR 4 IN 15
CTR 4 GATE 14
CTR 5 IN 13
CTR 5 GATE 12
GND 11
D OUT 0 10
D OUT 1 9
D OUT 2 8
D OUT 3 7
D OUT 4 6
D OUT 5 5
D OUT 6 4
D OUT 7 3
IR ENABLE 2
IR INPUT 1
CIO-CTR CONNECTOR - View from the rear of the PC.
37 CTR 1 GATE
36 CTR 1 IN
35 CTR 1 OUT
34 CTR 2 OUT
33 CTR 3 OUT
32 CTR 4 OUT
31 CTR 5 OUT
30 OSC. OUT
29 D IN 0
28 D IN 1
27 D IN 2
26 D IN 3
25 D IN 4
24 D IN 5
23 D IN 6
22 D IN 7
21 D IN STROBE
20 +5V
7
DIGITAL I/O REGISTERS
The digital input port at BASE + 2 is a 74LS373 input buffer with a strobe line.
When STROBE is high, the current status of the inputs to the 74LS373 may be read.
When STROBE goes low, the 74LS373 inputs are latched.
The digital output port at BASE + 3 is a 74LS273 output buffer. Each write to BASE
+ 3 places a byte of data on the output port.
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