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Posted By

KiCHY
on 2014-10-25
18:03:32
 Re: Charset in assembly

Hi icbrkr,

First a (perhaps unnecessary) clearance: there are multicolor and extended color mode on Plus4. Multicolor uses ff16 and ff17, extended color mode uses ff16, ff17 and ff18.
I read your code you set up multicolor mode but later you use all 3 extra color registers, ff18 is unused in multicolor mode.

Do you set bit 3 of video color ram values to turn on multicolor mode on each character position?
lda #$71 ; means white in hires and in multicolor as well, and all multicolor designed chars display without extra colors.
lda #$79 ; means light brown in hires and white in multicolor, and it displays the extra ff16, ff17 colors also.
sta $0800 ; set color of topleft character in video color ram.



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