Software: SeaMAC V6 – Windows
Downloads:
SeaMAC V6 for Windows v6.0.21Size: 6.8 MB Type: .exe
Release Notes for SeaMAC V6 for Windows v6.0.21Size: 5.0 KB Type: .txt
Article Specifications:
Software Package Name: SeaMAC V 6.0.21
Platform: Windows
Latest Update: May 21, 2026
Version: 6.0.21
Related Models: (all variations of these part numbers are supported) 5102, 5102E, 5102ES, 5102S, 5103, 5103E, 5103ES, 5103S, 5104, 5104E, 5104S, 5402, 5402E, 5402ec, and Relio R2-Sync Server
SeaMAC V6 provides a powerful WIN32 interface (CreateFile, ReadFile, WriteFile, etc) for Sealevel PCI Express and PCI synchronous serial products. SeaMAC V6 supports many popular protocols including HDLC/SDLC and various bisync, monosync, and raw (bit-shifter) modes.
SeaMAC V6 is supported on 32-bit and 64-bit versions of:
- Microsoft Windows 11
- Microsoft Windows 10
Note: Download SeaMAC V5 for legacy PC/104 or PCMCIA synchronous serial adapters, or legacy Windows OS support. If you are currently using SeaMAC V5 or attempted to install SeaMAC V5 under Windows 10, you will need to completely remove all traces of the old driver before installing SeaMAC V6. Please contact technical support for assistance before installing SeaMAC V6.
SeaMAC V6 System Requirements:
- Supported Sealevel synchronous serial hardware
- Microsoft Windows* (see supported versions above)
- Microsoft .Net Framework v3.5 SP1, or later
- 15 MB free hard drive space
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