IBM Multiprotocol Adapter for ISA (MPCA)

IBM Multiprotocol Adapter for ISA (MPCA)


Multiprotocol Adapter FRU Parts

FRU P/N 73G3223 IBM Multiprotocol Adapter for ISA
OPT P/N OMPR01Y IBM Multiprotocol Adapter for ISA

OPT P/N 6026304 MPCA jumpers
OPT P/N 1502067 IBM Communication Cable Kit (with Wrap plug)
OPT P/N 8529280 MPCA Wrap plug (Tri-Plug 72X8546 can also be used)

Contents of the Adapter Kit:



The IBM Multiprotocol Communications Adapter (MPCA) for ISA provides multiple communication modes for industry standard architecture (ISA) computers. The protocols provided are:


This adapter provides a serial transmission channel in full-duplex or half-duplex mode. It is fully programmable at speeds up to 19200 bits per second (bps) and supports autom. protocl switching through software. In addition to providing multiple protocols, the adapter also conforms to the following industry standards.

Asynchronous mode: 
16550 asynchronous protocol controller (UART)
Programmable transmission rates (50 to 19200 bps)
5, 6, 7 or 8 bit characters
1, 1.5 or 2 stop bits

CCITT V.25bis communication standard / EIA/TIA - 232 standard 

An external, 25 pin, D-shell connector is included on the adapter for connecting to modems or directly to attach devices. (max cable length = 7.6 meters (25 feet)) (No cables come with the option).

System Requirements

IBM PS/1, PS/ValuePoint AT or compatibles with an open ISA expansion slot (8 or 16 bit)
DOS Version 5.0 or higher or OS/2 2.0 or higher.

Configuring the Adapter

The MPCA for ISA comes configured as a first adapter.
Two MPCAs can be installed per computer. If you install only one, it is the first adapter. If you install a second MPCA, you must change a jumper to configure it as second adapter.

    First Adapter       Second Adapter
     P3   P2 P1           P3   P2 P1       Use a pen, and mark the
     °    °  °]           °    °  °        1  or  2 on the adapter
     °]   °] °            °]   °] °]       label (outside)
     °    °  °            °    °  °



The MPCA power on default mode select SDLC, interrupt levels 3 and 4, and DMA 1.


Installing the DOS Device Driver


  1.  Turn on the computer and start the operating system.
  2.  Insert the MPCA Option Diskette into drive A.
  3.  Type the following commands and press Enter
    COPY A:\DOSMPCA.SYS C:\
    COPY A:\DOSMPCA.COM C:\
  4.  Edit the CONFIG.SYS file to add the following statement:
    DEVICE=d:\path\DOSMPCA.SYS /m1 [m2]
  5.  Edit the AUTOEXEC.BAT file to add the following statement:
    DEVICE=d:\path\DOSMPCA.COM /m1 [m2]
     Where:
      d:\path = drive and path for DOSMPCA .SYS & .COM
      m1 = mode selection value for MPCA 1
      m2 = mode selection value for MPCA 2
      (read DOSMPCA.DOC on Option Diskette)
  6.  Remove the MPCA Option Diskette, and restart the computer



Installing the OS/2 Device Driver


  1.  Turn on the computer and start the operating system.
  2.  Insert the MPCA Option Diskette into drive A.
  3.  At the OS/2 command prompt, type the following command and press Enter
    COPY A:\OS2MPCA.SYS C:\
  4.  Edit the CONFIG.SYS file to add the following statements:
    DEVICE=d:\path\OS2MPCA.SYS /m1 [m2]
    DEVICE=s:\OS2\COM.SYS [(n,a,i) (n,a,i)]
     Where:
      d:\path = drive and path for OS2MPCA.SYS m1 [m2]
      m1 = mode selection value for MPCA 1
      m2 = mode selection value for MPCA 2
      s = drive where OS/2 is installed
      n = communication port to be accessed
      a = communication port I/O address
      i = interrupt request level
      (read OS2MPCA.DOC on Option Diskette)
  5.  Remove the MPCA Option Diskette, and restart the computer



Selecting Communications Modes

Mode MPCA 1 Address MPCA 2 Address Protocol Interrupts
00 03A0 0380 BSC Level 3 & 4
01 0380 03A0 BSC Level 3 & 4
02 03A0 0380 SDLC Level 3 & 4
03 0380 03A0 SDLC Level 3 & 4
04 0380 03A0 SDLC Level 3, 4, & DMA 1
05 03F8 03F8 ASYNC Level 4 & COM 1
06 02F8 02F8 ASYNC Level 3 & COM 2
07 03A0 0380 SDLC All level 3
08 03A0 0380 SDLC All level 4
09 0380 03A0 SDLC All level 3
0A 0380 03A0 SDLC All level 4 & DMA 1
0B 03A0 0380 BSC All level 3
0C 03A0 0380 BSC All level 4
0D 0380 03A0 BSC All level 3
0E 0380 03A0 BSC All level 4
10 03E8 03E8 ASYNC Level 3 COM 3
20 02E8 02E8 ASYNC Level 4 COM 4


Mode 04 is power on default

Testing the MPCA adapter

To run the diagnostic tests, you must use a WRAP Plug

Testing

  1.  Insert the MPCA Option Diskette in drive A and turn on the computer.
  2.  Follow the instructions on the screen.
  3.  If a problem occurs, note any test message displayed.  (Messages starting with 64 apply to the first MPCA, those starting  with 65 apply to the second MPCA)

    Message What to Do About It
    199 This message is displayed when you answer NO when asked if the Installed Adapter List is incorrect.
    If you are here by mistake, press Enter. Otherwise, follow the instructions displayed to either add or delete
    items from the Installed Adapter List.
    6x00 No errors detected
    6x21 1. The MPCA jumper P1 is not configured correctly
    2. The MPCA is failing.
    6x22 1. The MPCA cable is failing.
    2. The MPCA is failing.
    6x23 1. The MPCA jumper P1 is not configured correctly
    2. The MPCA is failing.
    6x24 1. The MPCA jumpers P2 and P3 are not configured correctly
    2. The MPCA is failing.

     

  4.  When testing is complete, remove the wrap plug and reconnect the cable.


Pin Assignments (DB 25 connector)

Pin Flow Lead ID Signal Name
7 ----- AB/102 Signal Ground
2 output BA/103 Transmitted Data
3 input BB/104 Receive Data
4 output CA/105 Request to Send
5 input CB/106 Clear to Send
6 input CC/107 Data Set Ready
20 output CD/108 2 Data Terminal Ready
20 output /108.1 2 Connect Data Set to Line
8 input CF/109 Data Carrier Detect
23 1 output CH/111 Rate Select
15 1 input DB/114 Transmit Signal Element Timing
17 1 input DD/115 Receive Signal Element Timing
22 input CE/125 Ring Indicator
11 output /126 2 Select Standby
18 output LL/141 Local Loop
25 input TM/142 Test Indicate


1 Not used in asynchronous mode 2 Not standarized by EIA


WRAP Plug (for diagnostic testing)

         1-----+
         2---+ |
         3<--+ |      Wiring diagram OPT P/N 8529280
         4---+ |
         5<--+ |
         6<--|-|--+
         7-----+  |
         8<--+    |
        11----------+
        15<-----+ | |
        17<-----+ | |
        18----+ | | |
        20----------+
        22<-------+
        23------+
        25<---+

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