NetBSD Problem Report #13078

Received: (qmail 28542 invoked from network); 1 Jun 2001 05:48:47 -0000
Message-Id: <>
Date: Thu, 31 May 2001 22:50:30 -0700 (PDT)
Subject: Mac 68LC040 problem
X-Send-Pr-Version: www-1.0

>Number:         13078
>Category:       port-mac68k
>Synopsis:       Mac 68LC040 problem
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-mac68k-maintainer
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jun 01 05:49:00 +0000 2001
>Closed-Date:    Sun May 15 21:15:24 +0000 2016
>Last-Modified:  Sun May 15 21:15:24 +0000 2016
>Originator:     andrew
>Release:        1.5
NetBSD 1.5 NetBSD 1.5 (GENERIC) #0: Sun Nov 19 14:20:10 PST 2000 root2@c610:/usr/cvs/src/sys/arch/mac68k/compile/GENERIC mac68k
Major problems with mac m68LC040
Run NetBSD...  more specifically, "ls -la" "send-pr", some programs called by startup scripts, sometimes ifconfig crashes, just about everything does!
This problem was reported and supposedly fixed in the linux kernel.  Something to do with the bus.  I dont remember...

From: Juergen Hannken-Illjes <>
Subject: Re: port-mac68k/13078: Mac 68LC040 problem
Date: Fri, 1 Jun 2001 10:10:48 +0200 (MET DST)

 Looks like the 68LC040 F-Line error. From Motorola:

 Here is E4 for the 68LC040:

 E4-	If a write is pending on the 68LC040 and an F-line Unimplemented
 	Exception is taken, the pending write data may be lost.

 Workaround:  place a NOP before the F-line instruction

 Juergen Hannken-Illjes - - TU Braunschweig (Germany)
State-Changed-From-To: open->closed
State-Changed-When: Sun, 15 May 2016 21:15:24 +0000
15 years later, mac68k is pretty close to irrelevant, and if it hasn't worked
in all this time most certainly nobody cares. It's a marginal processor model

Since it has no FPU (just traps for FPU emulation in software, which is what
goes wrong) the best approach is to build userland with softfloat. If anyone
has one of these things that they want to run and isn't already doing this,
try that.

If building a mac68k userland with softfloat is problematic or doesn't work,
please file a new PR.


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