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b9d6359be4
The .ucf files look like they are for a completely different board (the lx9 starter board, not the epizza board). So these need to be reworked completely. Also, the following signals needs adding to the top level 6502 design: - OEAH (output) - OEAL (output) - OED (output) - ML (output) - VP (output) - BE (input) The system will not work without some attention to these. Minimally, in the FPGA design we can tie them as follows: - OEAH (output) - set to 0 (address bus always enabled) - OEAL (output) - set to 0 (ditto) - OED (output) - set to !phi2 (data bus driven in second half of clock) - ML (output) - set output to 1 (and fit P3 link between pins 2 and 3) - VP (output) - set output to 1 (and don't fit P4 link) - BE (input) - ignore input The current adapter design does not fully support the implementation of BE as it does not provide a way to tristate RNW. That would require the addition of a seperate level shifter, e.g. a 74LVC1G125 Change-Id: I1bf11c5ef8318c5ebfa942cb4bd07f750d0b370d
74 lines
4.8 KiB
XML
74 lines
4.8 KiB
XML
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<header>
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<!-- project source files, project and process properties. This file, -->
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<!-- along with the project source files, is sufficient to open and -->
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<!-- implement in ISE Project Navigator. -->
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<!-- -->
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<!-- Copyright (c) 1995-2013 Xilinx, Inc. All rights reserved. -->
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</header>
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<version xil_pn:ise_version="14.7" xil_pn:schema_version="2"/>
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<files>
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<file xil_pn:name="WatchEvents.ngc" xil_pn:type="FILE_NGC">
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<association xil_pn:name="BehavioralSimulation" xil_pn:seqID="2"/>
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</file>
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