Changes

Jump to: navigation, search

CRTC

426 bytes added, 2 July
/* Datasheets */
Interlace 2 interlace modesare available:* In interlace sync mode, the same information is painted in both fields to enhance readability. In this mode, reprogramming the CRTC is not necessary* In interlace sync and video mode, alternating lines are displayed in the even and odd field to double the resolution
[[File:CRTC Interlace modes.png]]
* [[Media:hd6845.hitachi.pdf|HD6845S (Hitachi)]] aka Type 0
* [[Media:UM6845-UMC.pdf|UM6845 (UMC)]] aka Type 0
* [[Media:Um6845r.umc.pdf|UM6845R (UMC)]] aka Type 1. In this document, the figure 7 describing the "Interlace Sync and Video" mode is incorrect
* [[Media:Mc6845.motorola.pdf|MC6845 (Motorola)]] aka Type 2 [[Media:Mc6845.pdf|Other datasheet version]]
* [[Media:CPC_Plus_Asic_Schematic.GIF|AMS40489 (Amstrad)]] aka Type 3
== Unused clones ==
* [[CM607P]] a Bulgarian clone made in Pravetz factory
* [[Media:EF6845P.pdf|EF6845P]] by Thomson Semiconductors
* [[Media:UM6845E-UMC.pdf|UM6845E]] by UMC
* [[Media:F6845.pdf|F6845]] by Fairchild
* CRTC6545 [[Media:Mos 6545-1 crtc.pdf|CRTC 6545]] (MOS, Rockwell, Synertek) is pin-compatible with the 6845 and only has minor differences
* [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
Phi2x
5,908
edits
Retrieved from "https://gryzor.info/index.php/Special:MobileDiff/116983...116991"