HDL-Computer-From-Scratch-

Here I built my virtual computer from scratch with HDL, I did this while watching the nand2tetris course.

I also tried making the look-ahead-carry-adder component for a 16BIT adder but the IDE did not allow me to write it efficiently and forced me to write it in elementry gates, so halfway through I quit since my PC could not handle it.

Contained in repo:

• The hack PC
• 2 programs written hack assembly

the Hack PC that I built.

Some components I did not build like a screen and keyboard drivers.

I also tried making the look-ahead-carry-adder component for a 16BIT adder but the IDE did not allow me to write it efficiently and forced me to write it in elementry gates, so halfway through I quit since my PC could not handle it.

Hack PC

• CPU from scratch
• RAM from scratch

The Ram and CPU

• Memory Gates (mostly for RAM but the registers also for CPU)
• Arithmetic Gates (mostly in CPU)
• Elementary Gates (for everything)

Hack Assembly programs I wrote

• Mult.asm multiplies 2 numbers with each other. (39 lines of code to write in ASM)

• Fill.asm if key pressed -> blackens screen no key pressed -> whitens screen (105 lines of code to write in ASM)

Hack Assembler in C

• main.c has 2 steps, first it gets rid of all the garbage and cleans it up nicely, preprocessing secondly it translates all the instructions to binary code.

• Instruction/ this directory has the library that I made, it has the code for the translation logic.

• SymbolTable/ this directory has the hashmap library that I made, it has the code for hashmap logic

Known issues

sadly there was an error that I could not fix with huge files, the error has something to do with fclose not working properly.