PCI-FSIOP Cable

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!

Weblinks

• Pinouts for standard PC ports at pinouts.ru:
  • PC serial port (RS-232 DE9) pinout
  • Keyboard PS/2 pinout
  • Mouse (PS/2) pinout
  • ECP Parallel LPT port (IEEE-1284A) pinout
• Connectors and adapters bei IBM.com