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First post, by rcoltrane

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I've found the following table and I'm wondering if the error 'cpu:grp5: illegal call 7' is related to the coprocessor, not fully implemented, or I'm completely crazy??

Table 2-2. 80386 Reserved Exceptions and Interrupts

Vector Number Description

0 Divide Error
1 Debug Exceptions
2 NMI Interrupt
3 Breakpoint
4 INTO Detected Overflow
5 BOUND Range Exceeded
6 Invalid Opcode
7 Coprocessor Not Available
8 Double Exception
9 Coprocessor Segment Overrun
10 Invalid Task State Segment
11 Segment Not Present
12 Stack Fault
13 General Protection
14 Page Fault
15 (reserved)
16 Coprocessor Error
17-32 (reserved)

Reply 2 of 2, by Magamo

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I've seen this error pretty often on programs with slightly silly memory handling that do not expect Dos Box to be providing so much free conventional memory. You could try loadfixing away some of the memory, and seeing if that fixes the issue.