Editing Minimig Board v1.0 issues
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== Issue: X1,X2 operating mode? == | == Issue: X1,X2 operating mode? == | ||
* Crystals X1 and X2 is operating in parallel or serial mode ? | * Crystals X1 and X2 is operating in parallel or serial mode ? | ||
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== Issue: Video D/A inconsistency == | == Issue: Video D/A inconsistency == | ||
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* Replacing the two 512k x 16 with one 1M x 16 bit ram will do away with one chip and free RAM_SEL1 | * Replacing the two 512k x 16 with one 1M x 16 bit ram will do away with one chip and free RAM_SEL1 | ||
− | == | + | == RS232 pin header wiring == |
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* Connection, RS232: | * Connection, RS232: | ||
:[http://www.scantips.com/serial-db9.html Internal x86-pc bracket pin mapping] | :[http://www.scantips.com/serial-db9.html Internal x86-pc bracket pin mapping] | ||
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== Optimization: Clock generation == | == Optimization: Clock generation == | ||
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== FYI: Seems nFPGA_SEL2 is unused == | == FYI: Seems nFPGA_SEL2 is unused == | ||
− | Neither MCU or FPGA firmware sources reference this line in any active way. This could free one I/O | + | Neither MCU or FPGA firmware sources reference this line in any active way. |
− | + | This could free one I/O | |
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== FYI: Xilinx Place & Route limitation == | == FYI: Xilinx Place & Route limitation == | ||
[http://www.xilinx.com/ise/products/webpack_config.htm Xilinx ISE Webpack device support]<br> | [http://www.xilinx.com/ise/products/webpack_config.htm Xilinx ISE Webpack device support]<br> | ||
:Free version supports Spartan3 XC3S50 - XC3S1500 <!-- Has implication for m68k in hdl or expansions --> | :Free version supports Spartan3 XC3S50 - XC3S1500 <!-- Has implication for m68k in hdl or expansions --> |