|}
<br>
== CRTC Type Detection ==
<pre>
10 MODE 1:' Reinitialize screen
20 OUT &BC00,1231:IF INP(&BF00)=0 255 THEN GOTO 80PRINT"crtc 1":END30 ' If we are hereOUT &BC00, it is a CRTC0 or 3/412:IF INP(&BF00)=0 THEN PRINT"crtc 2":END40 OUT &BC00,20:IF INP(&BF00)=0 THEN GOTO 60PRINT"crtc 0":END
50 PRINT"crtc 3/4":END
60 PRINT"crtc 0":END
70 ' If we are here, it is a CRTC1 or 2
80 OUT &BC00,31:IF INP(&BF00)=0 THEN GOTO 100
90 PRINT"crtc 1":END
100 PRINT"crtc 2":END
</pre>
<br>
== CRTC Timing Diagram ==
[[File:CRTC timing small.gif]]
<br>
== Internal Counters ==
|}
<br>
== Hitachi Block Diagram ==
[[File:CRTC Block Diagram.png]]
<br>
== UMC Block Diagram ==
[[File:UMC CRTC Block Diagram.png]]
<br>
== Motorola Block Diagram ==
[[File:Motorola CRTC Block Diagram.png]]
<br>
== Datasheets ==