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Update puce6502.c

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ArthurFerreira2 2020-08-09 12:46:32 +02:00 committed by GitHub
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1 changed files with 3 additions and 8 deletions
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@ -52,14 +52,9 @@ struct Register {
} reg;
// instruction timing :
// http://nparker.llx.com/a2/opcodes.html
// http://wouter.bbcmicro.net/general/6502/6502_opcodes.html
// IMPLEMENTED :
// The conditional branch instructions require a second extra cycle if the
// branch happens and crosses a page boundary.
// instruction timing :
// http://nparker.llx.com/a2/opcodes.html
// http://wouter.bbcmicro.net/general/6502/6502_opcodes.html
// NOT IMPLEMENTED :
// Absolute-X, absolute-Y, and Zpage-Y addressing modes need an extra cycle
// if indexing crosses a page boundary, or if the instruction writes to memory.