Code: Select all

` lea $20000,a0`

move.w #%0000000000000001,(a0)+ ;one point blue

move.w #%0000000000000010,(a0)+ ;one point red

move.w #%0000000000000011,(a0)+ ;one point magenta

move.w #%0000001000000000,(a0)+ ;one point green

move.w #%0000001000000001,(a0)+ ;one point cyan

move.w #%0000001000000010,(a0)+ ;one point yellow

move.w #%0000001000000011,(a0)+ ;one point white

move.w #%0000000001010101,(a0)+ ;line of 4-points blue

move.w #%0000000010101010,(a0)+ ;line of 4-points red

move.w #%0000000011111111,(a0)+ ;line of 4-points magenta

move.w #%1010101000000000,(a0)+ ;line of 4-points green

move.w #%1010101001010101,(a0)+ ;line of 4-points cyan

move.w #%1010101010101010,(a0)+ ;line of 4-points yellow

move.w #%1010101011111111,(a0)+ ;line of 4-points white

clr.l d0

rts

How can I easily e.g. scroll some texts or graphics using this schema?

It is a little bit better as this one of ZX Spectrum (you know what I mean) but I still do no get the reason for such decision.

And I just wanted to use "shift left" to scroll some bits...