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1991-12-26
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ID:MC Microchannel Adapters, MCA.ADL, QEMM-386, QEMM 50/60, and QRAM
Quarterdeck Technical Note #223
By: Quarterdeck Testing & Compatibility Department
December 20, 1991
MCA.TEC
UNRECOGNIZED MICROCHANNEL ADAPTER
I GET THIS MESSAGE WHENEVER I BOOT MY MACHINE WHEN QEMM-386 (QEMM 50/60,
QRAM) IS LOADING: WHY?
The reason you get this message is that you have a Microchannel
adapter which is not in the file MCA.ADL.
WHAT IS MCA.ADL?
MCA.ADL is a file that comes with QEMM-386, QEMM 50/60 and QRAM.
It contains the configuration information about Microchannel cards so
that QEMM-386 (QEMM 50/60, QRAM) can read the configuration of the cards
installed in your computer. Many add-in boards such as network cards,
memory cards, and fax boards occupy memory between 640K and 1 megabyte.
The entries in the MCA.ADL file tell QEMM-386, QEMM 50/60 and QRAM what
portions of the address space those cards are using and keep QEMM-386
(QEMM 50/60, QRAM) from mapping HIGH RAM into the portions of the
address space being occupied by these cards.
WHY IS MY CARD NOT IN THE MCA.ADL?
New cards are being made constantly but your MCA.ADL file was
written when your QEMM-386 (QEMM 50/60, QRAM) was released. Here at
Quarterdeck we are updating our MCA.ADL whenever we receive the
configuration file of a new Microchannel adapter.
HOW CAN I GET A NEW COPY OF THE MCA.ADL?
A current copy is available on the Quarterdeck BBS (310-314-3227).
You may find one on a more current QEMM-386 (QEMM 50/60, QRAM)
purchaser's disk. The file is the same for all Quarterdeck products.
IS THERE ANOTHER WAY TO GET THE ENTRY FOR MY CARD?
If you do not wish to download the latest MCA.ADL from the BBS then
you may contact Quarterdeck Technical Support and have the entry for
your card FAXed or mailed to you.
WHAT DO I DO WITH THE ENTRY FOR MY CARD?
The MCA.ADL is a plain text file. Any word processor that can save
a non-formatted file (Wordstar in non-document mode, Microsoft Word as
"unformatted", Wordperfect as "DOS Text", for example,) can be used to
edit the MCA.ADL. Although the entry can be inserted anywhere in the
file good form would be to enter it in numerical order. The
Microchannel ID numbers are hexadecimal numbers.
WHAT IF MY DEVICE IS NOT ON THE LATEST MCA.ADL?
Then you should send a copy of the file "@XXXX.ADF" (where "XXXX"
is the number of the unrecognized Microchannel adapter) by mail or FAX
to Quarterdeck Technical Support so that we can make an appropriate
entry for the master MCA.ADL (this is why it is changes so often) and
have a copy of the proper entry sent to you by return mail or FAX. The
file @XXXX.ADF resides on the reference disk that comes with the adapter
card. It should also be on the reference diskette of the computer.
WHAT IF I AM NOT HAVING A PROBLEM?
QEMM-386 (QEMM 50/60, QRAM) use the Microchannel configuration only
for the purpose of making sure that they do not map High RAM (or the page
frame for QEMM-386 and QEMM 50/60) into portions of the address space
occupied by the adapter cards. There are many other factors involved in
the Microchannel configuration but they have no direct bearing upon
Quarterdeck products. In addition to using this Microchannel-specific
method of detecting address conflicts, QEMM-386, QEMM 50/60, and QRAM
also use more conventional methods to detect high address space
usage, methods that are used both on Microchannel and on non-
Microchannel machines. When they detect such usage of memory, High RAM
will not be mapped into the address space being occupied by the adapter
card even if there is no entry for the card in the MCA.ADL.
If the card does not use any high address space (and many do not)
then the entry in the MCA.ADL is for informational purposes only and is
not necessary for QEMM-386 (QEMM 50/60, QRAM) to configure itself to
work on the system. An unrecognized Microchannel Adapter message is
still reported but it can be safely ignored for these kind of adapters,
so you may be able to work without an entry for the unrecognized
adapter.
When there is an unrecognized Microchannel adapter installed, QEMM-
386 (QEMM 50/60, QRAM) will report an error and give you the option of
not loading itself. If you are having no problem, you can press any key
to continue at this point and QEMM-386 (QEMM 50/60, QRAM) will load. If
you wish to suppress this error message, you may put the NOPAUSEONERROR
(NOPE, for short) parameter on QEMM-386 (QEMM 50/60, QRAM). This is not
advisable as QEMM-386 (QEMM 50/60, QRAM) will not report any error. A
better temporary solution is to make a temporary entry in the MCA.ADL
for the target card. This entry will look like:
XXXX Waiting for a correct MCA.ADL entry from Quarterdeck
where XXXX is the number of the unrecognized Microchannel adapter.
EXAMPLE
You are getting the message: "Unrecognized Microchannel Adapter
@5600". Your MCA.ADL looks like this in this area:
5500 COREtape Controller
5502 CORE CNT-MCF Tape Controller
5606 Cabletron Ethernet Board E3010
X X000XXXX /ARAM=C000-C3FF
X X001XXXX /ARAM=C400-C7FF
X X010XXXX /ARAM=C800-CBFF
X X011XXXX /ARAM=CC00-CFFF
X X100XXXX /ARAM=D000-D3FF
X X101XXXX /ARAM=D400-D7FF
X X110XXXX /ARAM=D800-DBFF
X X111XXXX /ARAM=DC00-DFFF
5600 is absent. The correct entry for 5600 is:
5600 Cabletron Ethernet Board E3020
X X000XXXX /ARAM=C000-C3FF
X X001XXXX /ARAM=C400-C7FF
X X010XXXX /ARAM=C800-CBFF
X X011XXXX /ARAM=CC00-CFFF
X X100XXXX /ARAM=D000-D3FF
X X101XXXX /ARAM=D400-D7FF
X X110XXXX /ARAM=D800-DBFF
X X111XXXX /ARAM=DC00-DFFF
This entry you must obtain from Quarterdeck Technical Support as
mentioned above. This entry should be inserted in the MCA.ADL file
between the entries for 5502 and 5606. The final result will look like:
5500 COREtape Controller
5502 CORE CNT-MCF Tape Controller
5600 Cabletron Ethernet Board E3020
X X000XXXX /ARAM=C000-C3FF
X X001XXXX /ARAM=C400-C7FF
X X010XXXX /ARAM=C800-CBFF
X X011XXXX /ARAM=CC00-CFFF
X X100XXXX /ARAM=D000-D3FF
X X101XXXX /ARAM=D400-D7FF
X X110XXXX /ARAM=D800-DBFF
X X111XXXX /ARAM=DC00-DFFF
5606 Cabletron Ethernet Board E3010
X X000XXXX /ARAM=C000-C3FF
X X001XXXX /ARAM=C400-C7FF
X X010XXXX /ARAM=C800-CBFF
X X011XXXX /ARAM=CC00-CFFF
X X100XXXX /ARAM=D000-D3FF
X X101XXXX /ARAM=D400-D7FF
X X110XXXX /ARAM=D800-DBFF
X X111XXXX /ARAM=DC00-DFFF
Copyright (C) 1991 by Quarterdeck Office Systems
* * * E N D O F F I L E * * *