EasyASM is a simple simulator for a subset of MIPS32 and x86 ISAs. The main purpose is make easy the process of learning the assembler language. For this purpose EasyASM provides a simple command line interface were the user can type assembler instructions and test them without the need of using some assembler program. The program provides instant feedback to user, in case of an error. Apart from that the simulator provides some useful commands which are described in the section commands.

To install the program you need a C++ compiler and the source code. Once you have both you just need to enter the directory with the source code and type the command make. This process has been tested on linux. On windows it might work if you use msys

Once you have the simulator compiled, you can run it by typing ./EasyASM in the source directory. By default EasyASM starts in MIPS32 mode, if you want to start in x86 mode you have to include the flag --x86

The argument can be a register or a memory reference.
The constant can be any 32 bits constant in base 2, 10 or 16. For base use the prefix 0b and for base 16 0x

#set $s0 = 0x10008000
#set memory 0($s0) = 0xdeadbeef
#set memory 0x10008000 = 0x00fe0fea

#set eax = 0x10000000
#set dword [eax] = 0xdeadbeef
#set memory [eax + 4] = 0x00fe0fea

The argument can be a register, constant or a memory reference.

The format can be:

1. unsigned decimal
2. signed decimal
3. hex or hexadecimal
4. binary

#show $s0
#show $s0 hex
#show memory 0($s0) signed decimal
#show memory 0x10008000
#show -1 binary

#show eax
#show dword [eax] hexadecimal
#show dword [eax + 4] signed decimal
#show -1 binary

The format is optinal, if no format is specified unsigned decimal will be used.

Executes the code in a assembler file. The file path should be surrounded by ".

#exec "factorial.asm"

EasyASM is mainly developed by Ivan de Jesus Deras (ideras at gmail dot com)

GPLv2