* [UM6845E by UMC]
* [SY6845EA by Synertek]
* [https://github.com/hoglet67/BeebFpga/blob/dev/src/common/mc6845.vhd BeebFpga] [https://opencores.org/websvn/filedetails?repname=System09&path=%2FSystem09%2Ftrunk%2Frtl%2FVHDL%2Fcrtc6845.vhd OpenCores] VHDL implementations of the 6845
== Tools about CRTC ==