# LT6502b: slimmer 6502 laptop revision adds modem and SID chip

> **Key takeaway:** TechPaula released a second revision of the LT6502 open hardware laptop, dropping the expansion port in favor of an integrated modem and SID sound chip.

**Published:** 2026-10-19T20:12:46+00:00 
**Source:** Adafruit Electronics 
**Category:** open-hardware 
**Canonical URL:** https://fosswire.org/news/lt6502b-slimmer-6502-laptop-revision-adds-modem-and-sid-chip.html 

## Summary
The LT6502b is a slimmer redesign of the LT6502, a laptop built around the classic 6502 processor. The new orange revision removes the expansion port and adds a modem and SID sound chip. The memory map otherwise carries over from the first version. Build progress is documented from case render through to a fully assembled working machine.

## What changed in the LT6502b
- **Case**: Slimmer physical design; color changed from red to orange
- **Removed**: Expansion port (present in original LT6502)
- **Added**: Integrated modem and SID sound chip
- **Memory map**: Carried over from first revision with adjustments for new hardware
- **Status**: Work in progress with build log tracking full assembly
- **Availability**: Source and documentation on Codeberg, additional content on GitHub