0	reset isp
1	reset pc
2	access fault
3	address error
4	illegal instruction
5	integer divide-by-0
6	chk/chk2 instructions
7	ftrapcc, trapcc, trapv instructions
8	privilege violation
9	trace
10	unimplemented a-line opcode
11	unimplemented f-line opcode
12	unassigned - reserved
13	020/030, not used by 040
14	format error
15	uninitialized interrupt (often returned by peripherals with
		programmable vectors that haven't been programmed since
		last reset, but want to interrupt)
16-23	unassigned - reserved
24	spurious interrupt
25	level 1 interrupt autovector
26	level 2 interrupt autovector
27	level 3 interrupt autovector
28	level 4 interrupt autovector
29	level 5 interrupt autovector
30	level 6 interrupt autovector
31	level 7 interrupt autovector
32-47	unassigned - reserved
48	fp branch or set on unordered condition
49	fp inexact result
50	fp divide-by-0
51	fp underflow
52	fp operand error
53	fp overflow
54	fp signaling nan
55	fp unimplemented data type
56	030/68851, not used by 040
57	68851, not used by 040
58	68851, not used by 040
59-63	unassigned - reserved
64-255	user-defined