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asm6502-coder

Write 6502/65C02 assembly code using 64tass syntax within Prog8 programs.

198|27|Updated Jan 9, 2019
Search Tags:#assembly#6502#prog8#64tass#embedded-asm#asmsub
One-click install
npx skills add https://github.com/irmen/prog8 --skill asm6502-coder
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: asm6502-coder
Source: https://github.com/irmen/prog8/tree/main/.agents/skills/asm6502-coder
Command: npx skills add https://github.com/irmen/prog8 --skill asm6502-coder

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Write 6502/65C02 assembly code using 64tass syntax inside Prog8 programs, enabling tight, low-level control within a modern Prog8 workflow.

Core Features & Use Cases

  • Embeds 64tass-compatible assembly in Prog8 via %asm {{ }} blocks or asmsub routines.
  • Enforces 6502/65C02 instruction rules and explicit operand usage where required, with guidance for zeropage and CX16 targets.
  • Supports both standalone *.asm files and embedded assembly within Prog8 programs, enabling modular low-level routines.

Quick Start

Create a small *.asm file implementing a simple routine and call it from Prog8 using an asmsub block.

Frequently Asked Questions about asm6502-coder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write 6502 assembly code inside a Prog8 program?▼

To write 6502 assembly inside Prog8, embed 64tass-compatible code using %asm {{ }} blocks or asmsub routines, ensuring proper subroutine call conventions and clobber reporting.

Can I use 65C02 instructions with 64tass syntax for CX16 targets?▼

Yes, you can use 65C02 instructions with 64tass syntax for CX16 targets. The Skill enforces 6502/65C02 rules and explicit operand usage while providing zeropage usage guidance.

What is the best way to embed low-level assembly routines in Prog8?▼

The best way to embed low-level routines in Prog8 is using asmsub blocks or standalone *.asm files. This enables modular 6502 assembly with clear mapping to Prog8 symbols.

Does Prog8 support standalone assembly files alongside embedded asm blocks?▼

Yes, Prog8 supports both standalone *.asm files and embedded assembly within %asm {{ }} blocks. You can create a standalone *.asm file and call it from Prog8 using an asmsub block.

Why do my 6502 assembly subroutines fail when called from Prog8?▼

6502 assembly subroutines may fail if they lack proper subroutine call conventions, explicit operand usage for selective instructions, or accurate clobber reporting mapped to Prog8 symbols.

Do I need to report clobbered registers when writing embedded assembly in Prog8?▼

Yes, you need proper clobber reporting when writing embedded assembly in Prog8. This ensures correct mapping to Prog8 symbols and maintains stability across 6502-family targets.

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