chapter-instr-glance-input.tex

\section{Input}

\begin{minipage}{\textwidth}

\begin{instrtable}

	\begin{instruction}{IN A,(n)\See{1}} 
		\Symbol{\SymIN{A}{n}}
			\FlagsINan
			\OpCode{11}{011}{011}
			\Hex{DB}{2}
			\Cycles{3}{11}
			\Comment{
				\multirow{7}{*}{
					\tt
					\begin{tabular}{ll}
						r & \OCT{r} \\
						\hline
						B & 000 \\
						C & 001 \\
						D & 010 \\
						E & 011 \\
						H & 100 \\
						L & 101 \\
						A & 111 \\
					\end{tabular}
				}
			}
		\SkipToOpCode	
			\OpRange{n} 
			\Hex{..}{}
	\end{instruction}

	\begin{instruction}{IN r,(C)\See{2}} 
		\Symbol{\SymIN{r}{BC}}
			\FlagsINrc
			\OpCode{11}{101}{101}
			\Hex{ED}{2}
			\Cycles{3}{12}
		\SkipToOpCode 
			\OpCode{01}{\OCT{r}}{000}
			\Hex{..}{}
	\end{instruction}

	\begin{instruction}{IN (C)\See{2,3}} 
		\Symbol{(BC)}
			\FlagsINc
			\OpCode{11}{101}{101}
			\Hex{ED}{2}
			\Cycles{3}{12}
		\SkipToOpCode 
			\OpCode{01}{110}{000}
			\Hex{70}{}
	\end{instruction}

	\begin{instruction}{IND} 
		\Symbol{\SymIND[0]}
			\FlagsIND
			\OpCode{11}{101}{101}
			\Hex{ED}{2}
			\Cycles{4}{16}
		\SkipToSymbol
			\Symbol{\SymIND[1]}
			\FromSymbolToOpCode
			\OpCode{10}{101}{010}
			\Hex{AA}{}
		\SkipToSymbol
			\Symbol{\SymIND[2]}
	\end{instruction}
	
	\begin{instruction}{INDR} 
		\Symbol{\SymINDR[0]}
			\FlagsINDR
			\OpCode{11}{101}{101}
			\Hex{ED}{2}
			\Cycles{4}{16}
			\Comment{if {\tt B}=0}
		\SkipToSymbol
			\Symbol{\SymINDR[1]}
			\FromSymbolToOpCode
			\OpCode{10}{111}{010}
			\Hex{BA}{}
			\Cycles{5}{21}
			\Comment{if {\tt B}$\neq$0}
	\end{instruction}

	\begin{instruction}{INI} 
		\Symbol{\SymINI[0]}
			\FlagsINI
			\OpCode{11}{101}{101} 
			\Hex{ED}{2}
			\Cycles{4}{16}
		\SkipToSymbol
			\Symbol{\SymINI[1]}
			\FromSymbolToOpCode
			\OpCode{10}{100}{010}
			\Hex{A2}{}
		\SkipToSymbol
			\Symbol{\SymINI[2]}
	\end{instruction}
	
	\begin{lastinstruction}{INIR} 
		\Symbol{\SymINIR[0]}
			\FlagsINIR
			\OpCode{11}{101}{101}
			\Hex{ED}{2}
			\Cycles{4}{16}
			\Comment{if {\tt B}=0}
		\SkipToSymbol
			\Symbol{\SymINIR[1]}
			\FromSymbolToOpCode
			\OpCode{10}{110}{010}
			\Hex{B2}{}
			\Cycles{5}{21}
			\Comment{if {\tt B}$\neq$0}
	\end{lastinstruction}	
		
\end{instrtable}

\begin{notestable}
	\NoteItem{\See{1}Some assemblers allow {\tt IN (n)} to be used instead of {\tt IN A,(n)}}
	\NoteItem{\See{2}Some assemblers allow instruction to be written with  {\tt (BC)} instead of {\tt (C)}}
	\NoteItem{\See{3}Performs the input without storing the result. Some assemblers allow {\tt IN F,(C)} to be used instead of {\tt IN (C)}}
	\NoteItem{\See{4}Flag is {\tt 1} if {\tt B=0} after execution, otherwise {\tt 0}; similar to {\tt DEC B}}
	\NoteItem{\See{5}On Next this flag is destroyed, for other Z80 computers see section \XRef{z80_undocumented_instructions_io_block}}
\end{notestable}
	
\end{minipage}