Created
March 9, 2016 01:35
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FAP attribute snippet
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always @(posedge clk50) | |
begin | |
// inside active region | |
if ((vc >= vbp && vc < vfp) && (hc >= hbp && hc < hfp)) | |
begin | |
front_vram_rd_low = 0; | |
hpos = hc - hbp; | |
vpos = vc - vbp; | |
hdot = hpos[2:0]; | |
vdot = vpos[3:0]; | |
hchar = hpos[9:3]; | |
vchar = vpos[9:4]; | |
if (fetch_attribute) begin | |
front_vram_addr = 80 * vchar + hchar; | |
attribute_data = front_vram_data; | |
end | |
else begin | |
front_vram_addr = 80 * vchar + hchar + 2400; | |
char_data = front_vram_data; | |
end | |
fetch_attribute = ~fetch_attribute; | |
red = font_pixel ? attribute_data[5:4] : 0; | |
green = font_pixel ? attribute_data[3:2] : 0; | |
blue = font_pixel ? attribute_data[1:0] : 0; | |
end | |
// outside active region | |
else | |
begin | |
fetch_attribute = 1; | |
front_vram_rd_low = 1; | |
front_vram_addr = 13'bzzzzzzzzzzzz; | |
red = 0; | |
green = 0; | |
blue = 0; | |
end | |
end |
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