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>>>>> "ts" == Tomaz Stih <tomaz.stih@triglif.com> writes: ts> When dealing with 68000 boards with no vector base register ts> there is a problem with setting vectors because it is common ts> to put ROM at 0x0000 address where vectors reside thus making ts> it impossible to change them. 00000000 does not have to be ROM. You just have to be able to load 8 bytes from it at reset time. I've seen boards by Pro-Active Control which use a counter to change the memory mapping after the right number of bus cycles to that the vectors can be in RAM (except, effectively, the reset vector).