---
layout: page
title: Challenger 1P Applications
permalink: /apps/c1p/
---

Challenger 1P Applications
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[C1Pjs](/docs/c1pjs/) runs Challenger 1P (C1P) applications written in:

- [BASIC](BASIC/)
- [6502 Machine-Language](6502/)

To make it easy for our C1Pjs machines to load these applications, we provide the following **Serial** configuration files:

- [all.xml](all.xml)
- [samples.xml](samples.xml)

These configuration files create UI controls that allow you to choose from a set of BASIC and/or 6502 machine-language
programs that are automatically sent to the C1P's serial port.