Changes

CRTC

290 bytes added, 01:35, 29 December 2018
/* The 6845 Registers */ Add explanation
'--'--'--------------' '--'--'---------------'
So, it's possible to use 32KB screen size (used for [[Programming:Overscan|overscan]]) by setting bits 11 and 10 both to 1 (of Register 12). Bits MA11 and MA10 of the address generated by the CRTC are not written on the address bus to access video memory; settings both bits to 1 is the only way to cause a carry to bit MA12 when address pass over the end of current video page to change the memory address to the next video page.
== CRTC Differences ==
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