Getting the VGA settings right
PropellerGuy
Posts: 33
in Propeller 1
Hi all,
I'm trying to set up a simple VGA project using the original driver (this one). I need 320x240 VGA output (320x200 would also work) and would like it to cover the whole screen. I'm not sure how to configure the VGA driver to produce this. Currently I have the following configuration:
It produces a displayable signal but there's massive amounts of black space to the right and bottom edges (and the last two tile rows are missing.) Any comments/suggestions on how to improve it?
I'm trying to set up a simple VGA project using the original driver (this one). I need 320x240 VGA output (320x200 would also work) and would like it to cover the whole screen. I'm not sure how to configure the VGA driver to produce this. Currently I have the following configuration:
vgaparams long 0 'status
long 1 'enable
long %010_111 'pins
long %011 'mode
long 0 'videobase
long 0 'colorbase
long 32 'hc
long 24 'vc
long 1 'hx
long 1 'vx
long 0 'ho
long 0 'vo
long 640 'hd
long 16 'hf
long 96 'hs
long 48 'hb
long 476 'vd
long 11 'vf
long 2 'vs
long 31 'vb
long 20_000_000 'rate
It produces a displayable signal but there's massive amounts of black space to the right and bottom edges (and the last two tile rows are missing.) Any comments/suggestions on how to improve it?
Comments
320x240 should also require hc and vc values of 20 and 15, respectively (each tile is 16x16, not 10x10)