darumoso / assembler_6502

Assembler for a MOS 6502 written in rust

6502 Assembler

Intallation

Dependencies

In case rust isn't installed, it can be installed with:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Building

First clone the repo:

git clone https://github.com/Darumoso/assembler_6502 && cd assembler_6502

Then build with:

cargo build --release

Runing the parser

Once the project is succesfully builded, a binary can be found at:

cd target/release

Then make it executable

chmod +x ./assembler_6502

To run it, enter:

./assembler_6502

There will be 3 succesful outputs, and 1 error output, the error output is expected to fail

Code examples

Successfull outputs

The next are the correct inputs received by the parser

Example 1

LDX #$00
LDY #$00
firstloop:
    TXA
    STA $0200,Y
    PHA
    INX
    INY
    CPY #$10
    BNE firstloop
secondloop:
    PLA
    STA $0200,Y
    INY
    CPY #$20
    BNE secondloop

Example 2

LDX #$08
decrement:
    DEX
    STX $0200
    CPX #$03
    BNE decrement
    STX $0201
    BRK

Example 3

LDX #$01
LDA #$aa
STA $a0,X
INX
STA $a0,X

Error output

The next is the error input received by the parser

Example 1

LDY #$00
firstloop
    STA $0200,Y

Example 2

This error isn't reachable by the parser, to show it line 150 on main file must be commented and lines 168-169 must be uncommented

LDY #00
firstloop:
    STA $0200,Y