8-bit computers collection - MCbx

Raritan CCP-06 Cable to Aten MasterViev CS-128 KVM adapter

 

Both of these cables have male DB-25 connectors on the KVM side and male 2xPS/2 and VGA D-SUB connectors on the computer side. But their pinouts are different.

Here are pinouts of these cables. The xplainations may not be accurate, but pinouts are. Pictures below show pinouts of connectors in the cable looking to the front of connector, not to the solder part:

Mini-DIN (keyboard and mouse, PS/2) VGA D-sub 15 (pin 9 is the key - no pin) DB25M connector.

 

ATEN KVM CABLE

DB25M

VGA DB15M

KEYBOARD PS/2 M

MOUSE PS/2 M

EXPLAINATION

1

 

5

 

Keyboard clock

2

 

1

 

Keyboard data

3

 

2

 

Keyboard n.c

4

1

 

 

Video Red

5

2

 

 

Video Green

6

3

 

 

Video Blue

7

14

 

 

Video Vertical Sync

8

11

 

 

Video Monitor ID0

9

15

 

 

Video DDC data clock / Monitor ID3

10

 

 

1

Mouse Data

11

10

 

3

Video sync ground + Mouse ground

12

Not connected

13

14

 

3

 

Keyboard ground

15

 

4

 

Keyboard +5V

16

6

 

 

Video Red Ground

17

7

 

 

Video Green Ground

18

8

 

 

Video Blue Ground

19

4

 

 

Video Monitor ID2

20

13

 

 

Video Horizontal Sync

21

12

 

 

Video Monitor ID1

22

 

 

4

Mouse +5V

23

 

 

5

Mouse Clock

24

Not connected

25

 

RARITAN CCP06 KVM CABLE

DB25M

VGA DB15M

KEYBOARD PS/2 M

MOUSE PS/2 M

EXPLAINATION

1

 

 

6

Mouse nc.

2

 

 

4

Mouse +5V

3

 

 

5

Mouse Clock

4

 

 

1

Mouse data

5

 

1

 

Keyboard data

6

 

5

 

Keyboard clock

7

14

 

 

Video Vertical sync

8

13

 

 

Video Horizontal sync

9

12

 

 

Video Monitor ID1

10

4

 

 

Video Monitor ID2

11

3

 

 

Video Blue

12

2

   

Video Green

13

1

   

Video Red

14

 

 

2

Mouse nc.

15

Not connected

16

 

 

3

Mouse Ground

17

Not connected

18

 

4

 

Keyboard +5V

19

 

3

 

Keyboard GND

20

5, 10

 

 

Video gnd + Signal ground

21

15

 

 

Video monitor ID3

22

11

 

 

Video Monitor ID0

23

8

 

 

Video Blue Ground

24

7

   

Video Green Ground

25

6

   

Video Red Ground

 

Here is a converter:

RARITAN CCP06-ATEN KVM CONVERTER

DB25 M - to Aten MasterView KVM DB25 F - to Raritan CCP06 cable
1 6
2 5
3 -
4 13
5 12
6 11
7 7
8 22
9 21
10 4
11 16+20
12 -
13 -
14 19
15 18
16 25
17 24
18 23
19 10
20 8
21 9
22 2
23 3
24 -
25 -

Note:  - means not connected.

The adapter is made from an old hardware dongle. After opening its case I saw that everything is poured in some kind of ceramic-like synthetic resin. It was impossible to remove it using a paint solvent, a sharp screwdriver or melt it using a hot soldering iron or even flame. To recover DB-25 connectors from it, the entire module must be heated in candle flame until the resin will carck (thermal expansion). Next, the connectors may be slowly ripped from the board while still heating. Now the connectors must be cooked more to remove pieces of ripped tracks and as much resin as possible (using tweezers or a knife). It's better do do this in the open air or at least with all windows opened because the stench is unbearable. After this procedure solder pads must be heated one after one using a soldering iron to make solder pour well.

As these components look terribly (see photo) I experienced a small problem with colors - one base color was a bit darker than others. This was caused by a soot from a candle in a connectors (male or female connector). I re-seated it a few times and the problem disappeared.

Here's a picture of the adapter with Raritan cable attached (case opened to show connections):

MCbx, 2010


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