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URCL HEX
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Convert URCL to HEX

Verified by Adam B.· reviewed by FE Editorial ·updated Jun 19, 2026
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Is it possible to convert URCL to HEX?
Yes - URCL converts to HEX.

Use a URCL compiler like Haku8866's reference compiler with an ISA config to turn .urcl into your target's assembly, then run that architecture's own assembler to produce the final .hex. The URCL step does not emit hex directly, so the hex format is entirely defined by your chosen ISA and its assembler.

Also to HEX: WXB · UF2 · S19

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert URCL to HEX?

URCL is an intermediate language, not a fixed machine code, so a raw dump of numeric opcodes as .hex only makes sense once you have picked a concrete instruction set. People produce .hex to flash or load a homebrew or redstone CPU with the finished program.

How to convert URCL to HEX

URCL reference compiler (Haku8866/URCL) OPEN-SOURCE

Run py URCL.py <myISA> program.urcl output.txt to convert constants to base-10 and lower complex instructions, giving you ISA assembly ready to assemble into hex.

Your target ISA's assembler FREE

Feed the compiler's assembly output into the assembler that matches your ISA to emit the final .hex machine-code image for loading onto the CPU.

About these formats

.URCL URCL Assembly Source Code File

A .urcl file is a plain-text source file written in URCL (Universal Reduced Computer Language), a simple RISC-style assembly language used mostly by the Minecraft redstone computer…

Open .URCL details →
.HEX Intel HEX File

A .hex file is an Intel HEX file: compiled firmware for a microcontroller such as an Arduino, AVR, or PIC chip, stored as plain-text records. You don't run it on a PC - you flash it to the…

Open .HEX details →

Quality & what to watch

  • The URCL compiler outputs text assembly, not hex, so a second assembler step is required for a real .hex file.
  • The exact hex layout (word size, byte order) depends on your ISA config's BITS and target assembler, not on URCL itself.
  • Complex-to-core lowering happens before hex generation, so the machine code may be larger than a hand-assembled equivalent.

Frequently asked questions

Can URCL output hex directly?
No, the reference compiler stops at ISA-specific assembly; final hex is left to that ISA's assembler.
Why do I need to choose an ISA first?
Hex is raw machine code, which only has meaning for a specific instruction set and word size.
Does the compiler convert my number formats?
Yes, it converts all constants and bit patterns to base-10 as part of lowering before assembly.
How do I verify the program before making hex?
Run the included emulator on the compiled intermediate output to check it behaves correctly.