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Update puce6502.c
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puce6502.c
11
puce6502.c
@ -52,14 +52,9 @@ struct Register {
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} reg;
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} reg;
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// instruction timing :
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// instruction timing :
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// http://nparker.llx.com/a2/opcodes.html
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// http://nparker.llx.com/a2/opcodes.html
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// http://wouter.bbcmicro.net/general/6502/6502_opcodes.html
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// http://wouter.bbcmicro.net/general/6502/6502_opcodes.html
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// IMPLEMENTED :
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// The conditional branch instructions require a second extra cycle if the
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// branch happens and crosses a page boundary.
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// NOT IMPLEMENTED :
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// NOT IMPLEMENTED :
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// Absolute-X, absolute-Y, and Zpage-Y addressing modes need an extra cycle
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// Absolute-X, absolute-Y, and Zpage-Y addressing modes need an extra cycle
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// if indexing crosses a page boundary, or if the instruction writes to memory.
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// if indexing crosses a page boundary, or if the instruction writes to memory.
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