• Subject: Re: SDLC Adaptor config
  • From: neilp@xxxxxxxxxxx
  • Date: Sat, 4 Nov 2000 01:18:30 -0500


Jeff,

Is this one of the ancient SDLC Comm Adapter cards from the 80's (IBM part # 1501205) or the newer ISA Multiprotocol Adapter (IBM part # 73G7099)  ?
Presumably the latter, as I see no jumpers on the original SDLC Adapter.
I have the manual for the ISA MPCA card, but not the card itself.
I also have a copy of the MPCA for ISA Option Diskette (part # 83G8840).
According to the manual you install a device driver from the MPCA option diskette only if you need to select a communication mode other than the default mode.  It says the programs (DPSMPCA.SYS and OS2MPCA.SYS) initialize the adapter communications mode (I/O address, protocol and interrupt request level).

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

I'll assume you don't need the OS/2 instructions.

* Installing the DOS Device Driver
Copy DOSMPCA.SYS to C:\ and edit CONFIG.SYS to add:
        DEVICE =d:\path\DOSMPCA.SYS /m1 [m2]
where m1 is mode selection value for MPCA 1, and m2 is model selection value for MPCA 2 (if you have a 2nd card).

* Installing the DOS Modeset Initialization
Copy DOSMPCA.COM to C:\
edit AUTOEXEC.BAT to add:
        d:\path\DOSMPCA.COM /m1 [m2]

Here are the mode selection values for the First MPCA (m1)  (Mode 04 is power on default)
Mode        Address        Protocol        Interrupts
00        03A0                BSC                Level 3 & 4
01        0380                BSC                Level 3 & 4
02        03A0                SDLC                Level 3 & 4
03        0380                SDLC                Level 3 & 4
04        0380                SDLC                Level 3, 4 & DMA 1
05        03F8                ASYNC                Level 4  COM 1
06        02F8                ASYNC                Level 3  COM 2
07        03A0                SDLC                All level 3
08        03A0                SDLC                All level 4
09        0380                SDLC                All level 3
0A        0380                SDLC                All level 4 & DMA 1
0B        03A0                BSC                All level 3
0C        03A0                BSC                All level 4
0D        0380                BSC                All level 3
0E        0380                BSC                All level 4
10        03E8                ASYNC                Level 3  COM 3
20        02E8                ASYNC                Level 4  COM 4
0F        Disables address decode except configuration register

Here are the mode selection values for the Second MPCA (m2)  (Mode 04 is power on default)
Mode        Address        Protocol        Interrupts
00        0380                BSC                Level 3 & 4
01        03A0                BSC                Level 3 & 4
02        0380                SDLC                Level 3 & 4
03        03A0                SDLC                Level 3 & 4
04        03A0                SDLC                Level 3, 4 & DMA 1
05        03F8                ASYNC                Level 4  COM 1
06        02F8                ASYNC                Level 3  COM 2
07        0380                SDLC                All level 3
08        0380                SDLC                All level 4
09        03A0                SDLC                All level 3
0A        03A0                SDLC                All level 4 & DMA 1
0B        0380                BSC                All level 3
0C        0380                BSC                All level 4
0D        03A0                BSC                All level 3
0E        03A0                BSC                All level 4
10        03E8                ASYNC                Level 3  COM 3
20        02E8                ASYNC                Level 4  COM 4
0F        Disables address decode except configuration register


I'll email you the files from the diskette.


FYI

The manual says the jumpers are only for configuring the adapter to be the SECOND MPCA adapter in a PC.  You can have two cards installed, and the default jumper settings are for the FIRST (or only) adapter in the PC.  Jumper P1 is the only one that is altered for this.
There should be 3 jumpers, P3 P2 P1
Jumper positions for a first adapter are:
P3        pin 2-3
P2        pin 2-3
P1        pin 1-2
Jumper positions for a second adapter are:
P3        pin 2-3
P2        pin 2-3
P1        pin 2-3
It says in the manual that if you have two MPCAs and later remove one, you must change the jumper on the remaining card to be a FIRST adapter.
Too bad, otherwise it would appear you could do what you want (change address from 0380 to 03A0) simply by setting the jumpers as though you have a second MPCA card.  
Actually, DO you have a second MPCA card - is that why you need to change this in the first place ?

Neil Palmer      DPS Data Processing Services Canada Ltd.
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Jeff Crosby <jlcrosby@fwi.com>
Sent by: owner-midrange-l@midrange.com

2000/11/02 10:17
Please respond to MIDRANGE-L

       
        To:        Midrange Mailing List <MIDRANGE-L@midrange.com>
        cc:        
        Subject:        SDLC Adaptor config



I need to change the adaptor address on an SDLC card I have installed
from 0380 to 03A0.

I found the manual from the "Remote Emulation Program" from umpteen
years ago, but not the manual for the adaptor card.  There are 2 jumpers
on the card, each with multiple settings, but no indication of what is
what.  The CD based (Library Reader) and online documentation were no
help.

If anyone has any information, that would be a big help.  I also left a
VM with my friendly neighborhood IBM CE.

Thanks.

--
-Jeff
The opinions expressed are my own and not necessarily
the opinion of my company.  Unless I say so.


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