search

MEGA65 / mega65-core

MEGA65 FPGA core
Other
245 stars 88 forks source link

Setting CharGen Vertical pos ($d04e) mid frame has no effect #326

Open smnjameson opened 3 years ago

smnjameson commented 3 years ago

In order to create a static HUD a the bottom of the screen while scrolling a map in the upper section its necessary to allow the changing of $d04e on a raster split. Currently this has no effect:

https://user-images.githubusercontent.com/4640763/102932319-f79dda80-4497-11eb-8291-c12fec5af938.mp4

Video show current behaviour: Grey border = Raster sets $d04e scrolling all the time Black Border= Raster sets $d04e to static value but scrolling continues from top area

lydon42 commented 2 years ago

@smnjameson is this fixed in recent cores? Can you provide a simple test program?

archiecrux commented 3 months ago

SPLIT.zip

setting up interrupt handler and therein ...

lda $d079 inc inc inc sta $d04e

... is working