PoC: English

2026-06-28T21:09:21Z

English

← Older revision		Revision as of 23:09, 28 June 2026
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	[[File:Ibm_45H2433_ps2.jpg\|thumb\|right\|PS/2- and ~~Seriell~~-Brick]]		[[File:Ibm_45H2433_ps2.jpg\|thumb\|right\|PS/2- and serial-Brick]]
	[[File:IPCS-2850-12.jpg\|thumb\|right\|IPCS #2850 Primary board featuring a 333 MHz Pentium Overdrive processor]]		[[File:IPCS-2850-12.jpg\|thumb\|right\|IPCS #2850 Primary board featuring a 333 MHz Pentium Overdrive processor]]
	[[File:IPCS-285A.jpg\|thumb\|right\|Daughter-card for the #2850 carrying ports and further PC chipset components]]		[[File:IPCS-285A.jpg\|thumb\|right\|Daughter-card for the #2850 carrying ports and further PC chipset components]]

PoC: New

2026-06-28T21:08:56Z

New

New page

[[File:Ibm_45H2433_ps2.jpg|thumb|right|PS/2- and Seriell-Brick]]
[[File:IPCS-2850-12.jpg|thumb|right|IPCS #2850 Primary board featuring a 333 MHz Pentium Overdrive processor]]
[[File:IPCS-285A.jpg|thumb|right|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:
{| class="wikitable"
!rowspan="2"|IPCS<br />MDR40
!rowspan="2"|RS-232 serial<br />DE9
!colspan="2"|PS/2 (Mini-DIN 8)
!rowspan="2"|IEEE 1284 parallel<br />DB25
!rowspan="2"|Remark
|-
!Keyboard
!Mouse
|-
|align="center"|1
| 
| 
| 
|align="center"|8
|Data6
|-
|align="center"|2
| 
| 
| 
|align="center"|18
|GND
|-
|align="center"|3
| 
| 
| 
|align="center"|7
|Data5
|-
|align="center"|4
| 
| 
| 
|align="center"|1
|HostClock
|-
|align="center"|5
| 
| 
| 
|align="center"|6
|Data4
|-
|align="center"|6
| 
| 
| 
|align="center"|17
|1284 Active
|-
|align="center"|7
| 
| 
| 
|align="center"|5
|Data3
|-
|align="center"|8
| 
| 
| 
|align="center"|16
|NReverseRequest
|-
|align="center"|9
| 
| 
| 
|align="center"|4
|Data2
|-
|align="center"|10
| 
| 
| 
|align="center"|15
|PeriphRequest
|-
|align="center"|11
| 
| 
| 
|align="center"|3
|Data1
|-
|align="center"|12
| 
| 
| 
|align="center"|14
|HostAck
|-
|align="center"|13
| 
| 
| 
|align="center"|2
|Data0
|-
|align="center"|14
|align="center" colspan="5"|NC
|-
|align="center"|15
| 
|align="center"|5
| 
| 
|Clock
|-
|align="center"|16
|align="center"|5
|align="center"|3
|align="center"|3
| 
|Gnd
|-
|align="center"|17
|align="center"|8
| 
| 
| 
|CTS
|-
|align="center"|18
|align="center"|3
| 
| 
| 
|TxD
|-
|align="center"|19
|align="center"|6
| 
| 
| 
|DSR
|-
|align="center"|20
|align="center"|1
| 
| 
| 
|DCD
|-
|align="center"|21
| 
| 
| 
|align="center"|22
|GND
|-
|align="center"|22
| 
| 
| 
|align="center"|9
|Data7
|-
|align="center"|23
| 
| 
| 
|align="center"|21
|GND
|-
|align="center"|24
| 
| 
| 
|align="center"|24
|GND
|-
|align="center"|25
| 
| 
| 
|align="center"|13
|X-Flag
|-
|align="center"|26
| 
| 
| 
|align="center"|20
|GND
|-
|align="center"|27
| 
| 
| 
|align="center"|12
|NAckReverse
|-
|align="center"|28
| 
| 
| 
|align="center"|23
|GND
|-
|align="center"|29
| 
| 
| 
|align="center"|11
|PeriphAck
|-
|align="center"|30
| 
| 
| 
|align="center"|25
|GND
|-
|align="center"|31
| 
| 
| 
|align="center"|10
|PeriphClock
|-
|align="center"|32
| 
| 
| 
|align="center"|19
|GND
|-
|align="center"|33
| 
| 
|align="center"|1
| 
|Data
|-
|align="center"|34
| 
| 
|align="center"|5
| 
|Clock
|-
|align="center"|35
| 
|align="center"|1
| 
| 
|Data
|-
|align="center"|36
| 
|align="center"|4
|align="center"|4
| 
|VCC
|-
|align="center"|37
|align="center"|9
| 
| 
| 
|RI
|-
|align="center"|38
|align="center"|4
| 
| 
| 
|DTR
|-
|align="center"|39
|align="center"|7
| 
| 
| 
|RTS
|-
|align="center"|40
|align="center"|2
| 
| 
| 
|RxD
|}

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

== Weblinks ==
* Pinouts for standard PC ports at pinouts.ru:
** [http://pinouts.ru/SerialPorts/Serial9_pinout.shtml PC serial port (RS-232 DE9) pinout]
** [http://pinouts.ru/Inputs/KeyboardPC6_pinout.shtml Keyboard PS/2 pinout]
** [http://pinouts.ru/Inputs/PS2Mouse_pinout.shtml Mouse (PS/2) pinout]
** [http://pinouts.ru/ParallelPorts/ParallelECP_pinout.shtml ECP Parallel LPT port (IEEE-1284A) pinout]
* [https://www.ibm.com/support/knowledgecenter/en/POWER6/iphah/cablesandcards.htm Connectors and adapters] bei IBM.com

[[Category: Hardware Documentation]]

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