Changes
CRTC
,/* Unused clones */
* [[Media:VL6845 VTi.pdf|VL6845]] by VTi
* [[Media:C6845 CRTC (CAST).pdf|C6845]] by Cast
* [[Media:MB89321B FUJ.pdf|MB89321B]] by Fujitsu. It is pin-compatible with the 6845
* [[Media:MB89321A datasheet CRTC.pdf|MB89321A]] by Fujitsu. Enhanced version that adds smooth scroll, screen partitioning, independent scrolling of screen partitions, and other convenient features
* [[Media:Mos 6545-1 crtc.pdf|MOS 6545]] (MOS, Rockwell, Synertek) is pin-compatible with the 6845. Its differences are found in the R8 register.
* [https://www.cpcwiki.eu/forum/other-retro/interesting-discussion-about-the-c128-s-cpm-poor-performance/msg223058/#msg223058 MOS 8563] It is an evolution of the 6545/6845 CRTC chip, with blitter abilities to autonomously perform block memory copies within its dedicated video RAM.
* [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
