#8000003D
This is a "unimplemented interger instruction" exception (vector offset 0x0F4).
This means that 68060 has encountered an instruction it doesn't support in hardware. The unimplemented instructions are:
DIVU.L <ea>,Dr:Dq ; 64 / 32 => 32r,32q
DIVS.L <ea>,Dr:Dq ; 64 / 32 => 32r,32q
MULU.L <ea>,Dh:Dl ; 32 * 32 => 64
MULS.L <ea>,Dh:Dl ; 32 * 32 => 64
MOVEP Dx,(d16,Ay) ; size = W or L
MOVEP (d16,Ay),Dx ; size = W or L
CHK2 <ea>,Rn ; size = B, W or L
CMP2 <ea>,Rn ; size = B, W or L
CAS2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) ; size = W or L
CAS Dc:Du,<ea> ; size = W or L, misaligned <ea>
The exception tells us that MC68060ISP is not installed. See
M68060UM/AD Appendix C for details.
In simple terms MC68060ISP provides emulation for the unimplemented integer opcodes. Typically the 68060.library includes this (aswell as other 68060SP parts, emulation for missing FPU things for example).
If no proper 68060.library is installed, the system will not function properly.
Now, it could well be that the provided 68060.library doesn't properly handle 68LC060 and assumes FPU. In that case, contact your dealer and/or the card manufacturer for working drivers.
All the bad things said about Phase5/DCE, at least they had working drivers for their hardware.