What is the poke to turn a C128 to 2MHz in C64 mode?
Posted: Thu Dec 02, 2004 10:26 am
/Anders
The Commodore Vic 20 Forum
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True, but if you're programming in assembly, you can set up raster interrupt routines that switches to 2MHz at when the raster beam reaches the bottom border, and back to 1MHz when it reaches the start of the screen. Should give you the equivalent of 1.5MHz or so.carlsson wrote:However, since the other chips are not 2 MHz compliant, I think the screen will go blank and the I/O ports will not work until switching back to 1 MHz.
Isn't that much like how the Plus/4 and C16 work?Bacon wrote:True, but if you're programming in assembly, you can set up raster interrupt routines that switches to 2MHz at when the raster beam reaches the bottom border, and back to 1MHz when it reaches the start of the screen. Should give you the equivalent of 1.5MHz or so.