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Created page with "It is possible to set different screen refresh rates by changing some [[CRTC]] registers. With the following lines of code you can change the refresh rate to 50Hz, 60Hz or 75Hz. ..."
It is possible to set different screen refresh rates by changing some [[CRTC]] registers. With the following lines of code you can change the refresh rate to 50Hz, 60Hz or 75Hz.
== 50 Hz ==
<pre>
ld bc,&bc04
out (c),c
ld bc,&bd26
out (c),c
ld bc,&bc05
out (c),c
ld bc,&bd00
out (c),c
ld bc,&bc07
out (c),c
ld bc,&bd1e
out (c),c
</pre>
== 60 Hz ==
<pre>
ld bc,&bc04
out (c),c
ld bc,&bd1f
out (c),c
ld bc,&bc05
out (c),c
ld bc,&bd06
out (c),c
ld bc,&bc07
out (c),c
ld bc,&bd1b
out (c),c
</pre>
== 75 Hz ==
<pre>
ld bc,&bc04
out (c),c
ld bc,&bd1b
out (c),c
ld bc,&bc05
out (c),c
ld bc,&bd02
out (c),c
ld bc,&bc07
out (c),c
ld bc,&bd19
out (c),c
</pre>
[[Category:Programming]]
== 50 Hz ==
<pre>
ld bc,&bc04
out (c),c
ld bc,&bd26
out (c),c
ld bc,&bc05
out (c),c
ld bc,&bd00
out (c),c
ld bc,&bc07
out (c),c
ld bc,&bd1e
out (c),c
</pre>
== 60 Hz ==
<pre>
ld bc,&bc04
out (c),c
ld bc,&bd1f
out (c),c
ld bc,&bc05
out (c),c
ld bc,&bd06
out (c),c
ld bc,&bc07
out (c),c
ld bc,&bd1b
out (c),c
</pre>
== 75 Hz ==
<pre>
ld bc,&bc04
out (c),c
ld bc,&bd1b
out (c),c
ld bc,&bc05
out (c),c
ld bc,&bd02
out (c),c
ld bc,&bc07
out (c),c
ld bc,&bd19
out (c),c
</pre>
[[Category:Programming]]
