IBM 3270 card in 386SX

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2 total messages Started by Dave Wade Tue, 21 Jul 1992 15:11

#34

Author: Dave Wade
Date: Tue, 21 Jul 1992 15:11

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Hi,
 I have been loaned an "real" IBM 3278 Emulation Card and Software. The
vital pages from the manuals have been "removed" by a past owner.
Any way the card works fine in a "real" IBM PC/AT and in a XT clone
but in the 386SX machine I wanted to use it on it hangs up with a
Communications Error. I suspect some sort of hardware clash but I
can't tell for certain. Can any one tell me which Interupts the card
uses and which memory and/or i/o addresses?? so I have a chance of
solving it. Also how to change if possible. Thanks. Dave Wade.

Re: IBM 3270 card in 386SX

#36

Author: Marigowda Divya
Date: Wed, 22 Jul 1992 10:02

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In comp.protocols.ibm you write:

>Hi,
> I have been loaned an "real" IBM 3278 Emulation Card and Software. The
>vital pages from the manuals have been "removed" by a past owner.
>Any way the card works fine in a "real" IBM PC/AT and in a XT clone
>but in the 386SX machine I wanted to use it on it hangs up with a
>Communications Error. I suspect some sort of hardware clash but I
>can't tell for certain. Can any one tell me which Interupts the card
>uses and which memory and/or i/o addresses?? so I have a chance of
>solving it. Also how to change if possible. Thanks. Dave Wade.

if it is an SDLC type card, you may want to try running it at lower
 speed; i.e. if the 386SX is 16mhz, drop it to 8mhz.  I have noticed
 this kind of an error with the IBM SDLC card when running with IBM
 3270 software.  Incidentally, this same card with non-IBM software
 seems to work fine on all systems.  I suspect that the delay between
 two I/O instructions is fixed and maybe on faster machines the delay
 is not enough for the SDLC communications chip.

Good Luck.

marigowda divya  (mdivya@world.std.com)

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