glm94/assm-test
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

More refinements to the loading data instructions. I am truly bad at this whole thing...

Browse Source
This commit is contained in:
glm94
2022-09-29 20:42:37 +00:00
parent 2b71ac05a0
commit e94e486e18
1 changed files with 11 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/document.tex
+11 -8
View File
@@ -72,21 +72,24 @@
\section{STOW (Store Machine Word)}
\OpcodeTable{0x20}{stow}{Register}{Address}\\[6pt]
Stores a machine word from a register to a memory address.
\section{LA (Load Address)}
\OpcodeTable{0x00}{la}{Register}{Address}\\[6pt]
Loads an address (2 bytes) into the register.
\section{LODB (Load Byte)}
\OpcodeTable{0x20}{lodb}{Register}{Address}\\[6pt]
Loads a single byte into a register from a memory address, zeroing out the high nibble.
\OpcodeTable{0x20}{lodb}{Register}{Register}\\[6pt]
Loads a single byte into a register from a memory address in the second operand register, zeroing out the high nibble.
\section{LODW (Load Machine Word)}
\OpcodeTable{0x20}{lodw}{Register}{Address}\\[6pt]
Loads a word into a register from a memory address.
\section{LODBI (Load Immediate Byte)}
\OpcodeTable{0x00}{lodbi}{Register}{Constant}\\[6pt]
Loads an immediate byte into the register, zeroing the high nibble.
\OpcodeTable{0x20}{lodw}{Register}{Register}\\[6pt]
Loads a word into a register from a memory address in the second operand register.
\section{LODWI (Load Immediate Word)}
\OpcodeTable{0x00}{lodwi}{Register}{Constant}\\[6pt]
Loads an immediate machine word into the register.
Loads an immediate machine word into the register clearing the high nibble if the value is less then 256.
\section{CMP (Compare)}
\OpcodeTable{0x20}{cmp}{Register}{Register}\\[6pt]
Compares two registers and somewhere sets a result, maybe in register 1?
\section{CMPI (Compare Immediate)}
\OpcodeTable{0x00}{cmpi}{Register}{Constant}\\[6pt]
Compares an immediate 2 byte value to the contents of a register setting a result.
\section{ADD (Add)}
\OpcodeTable{0x20}{add}{Register}{Register}\\[6pt]
Performs addition on a register with a value from another (or the same) register.