Changes
CRTC
,/* Unused clones */
* [[Media:C6845 CRTC (CAST).pdf|C6845]] by Cast
* [[Media:Mos 6545-1 crtc.pdf|CRTC 6545]] (MOS, Rockwell, Synertek) is pin-compatible with the 6845. Its differences are found in the R8 register.
* [[Media:MB89321B FUJ.pdf|MB89321B]] by Fujitsu. It is pin-compatible with the 6845. There is also an enhanced version that adds smooth scroll, additional screen partitioning, independent scrolling of screen partitions, and other convenient features.
* [https://github.com/hoglet67/BeebFpga/blob/dev/src/common/mc6845.vhd BeebFpga] [https://github.com/MiSTer-devel/Amstrad_MiSTer/blob/master/rtl/UM6845R.v MiSTer] [https://opencores.org/websvn/filedetails?repname=System09&path=%2FSystem09%2Ftrunk%2Frtl%2FVHDL%2Fcrtc6845.vhd OpenCores] Verilog/VHDL implementations of the 6845
