Difference between revisions of "Minimig 68K CPU BERR* Support"
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(New page: We can connect one of the spare FPGA pins (such as USER I/O 3) to BERR* on the MC68SEC000 so that we can generate a Bus error exception to 68K CPU when bad code addresses non-existant memo...) |
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Revision as of 19:43, 11 August 2007
We can connect one of the spare FPGA pins (such as USER I/O 3) to BERR* on the MC68SEC000 so that we can generate a Bus error exception to 68K CPU when bad code addresses non-existant memory. A Verilog code module to implement this function would be simple (equivalent to a single 74LCX164 or about 5 to 10 lines of Verilog in the Spartan3). I think that the Guru meditation Errors from Amiga OS support reporting BERR* Vector.
