Octoate: 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. ..."

2012-04-21T22:35:57Z

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. ..."

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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]]

Screen refresh rate - Revision history

Octoate: 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. ..."