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CHiPs44 / hagl_pico_vgaboard

HAGL HAL for Raspberry Pi Pico VGA board (scanvideo)
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Make some 1280x800 16:10 modes available #25

Open CHiPs44 opened 1 year ago

CHiPs44 commented 1 year ago

cf. http://tinyvga.com/vga-timing/1280x800@60Hz

CHiPs44 commented 1 year ago

Not very interesting, as it is a multiple of 640x400...

See https://github.com/CHiPs44/hagl_pico_vgaboard/blob/develop/include/pico-vgaboard-modes-1280x800.h.

CHiPs44 commented 1 year ago

Interesting, in fact, as it makes 640x400, 320x200 & al. modes available in 60Hz instead of 70Hz.

Perhaps having an "halved" 1280x800@60 could be an acceptable compromise?

CHiPs44 commented 9 months ago

83.46 MHz => rounded: 83.5 * 3 = 250.5 MHz for sysclk, OK for vcocalc.