PCI-FSIOP Cable

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PS/2- and serial-Brick
IPCS #2850 Primary board featuring a 333 MHz Pentium Overdrive processor
Daughter-card for the #2850 carrying ports and further PC chipset components

The add-on hardware internal PC server, or IPCS, or internal xSeries server, or internal Netfinity server, or FSIOP, or File Server I/O Processor, Feature #285x or #286x or similar require a special cable to connect essential human interface devices such as keyboard and mouse. IBM part number is 45H2433.

The connector on the board side is a Mini-Centronics with 40 pins (MDR40). Breakout-boards are available from some vendors, but no single plug, or cable to create a fan-out yourself.

This is the pinout of the IBM 45H2433 cable:

IPCS
MDR40
RS-232 serial
DE9
PS/2 (Mini-DIN 8) IEEE 1284 parallel
DB25
Remark
Keyboard Mouse
1       8 Data6
2       18 GND
3       7 Data5
4       1 HostClock
5       6 Data4
6       17 1284 Active
7       5 Data3
8       16 NReverseRequest
9       4 Data2
10       15 PeriphRequest
11       3 Data1
12       14 HostAck
13       2 Data0
14 NC
15   5     Clock
16 5 3 3   Gnd
17 8       CTS
18 3       TxD
19 6       DSR
20 1       DCD
21       22 GND
22       9 Data7
23       21 GND
24       24 GND
25       13 X-Flag
26       20 GND
27       12 NAckReverse
28       23 GND
29       11 PeriphAck
30       25 GND
31       10 PeriphClock
32       19 GND
33     1   Data
34     5   Clock
35   1     Data
36   4 4   VCC
37 9       RI
38 4       DTR
39 7       RTS
40 2       RxD

Thanks to Mathias for his help when probing the pinout of an existing cable!

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