Apple-1-HW/verilog-apple-one
1
0
Fork 0
mirror of https://github.com/alangarf/apple-one.git synced 2025-01-23 05:30:16 +00:00
Code Issues Projects Releases Wiki Activity

Added defines to choose display mode of fonts

Browse Source
This commit is contained in:
Alan Garfield 2018-02-06 00:35:30 +11:00
parent 25aff9cdc3
commit 6f7812f51d
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
rtl/vga/font_rom.v
View File

@ -20,6 +20,9 @@
// Author.....: Alan Garfield
// Date.......: 3-2-2018
//
//`define DOTTY
//`define SCANLINES
`define NORMAL
module font_rom(
input clk, // clock signal
@ -48,7 +51,17 @@ module font_rom(
wire [3:0] line_ptr = line[4:1];
always @(posedge clk)
begin
`ifdef DOTTY
out <= (line[0] & pixel[0]) ? rom[(character * 10) + {2'd0, line_ptr}][pixel_ptr] : 1'b0;
`endif
`ifdef SCANLINES
out <= (line[0]) ? rom[(character * 10) + {2'd0, line_ptr}][pixel_ptr] : 1'b0;
`endif
`ifdef NORMAL
out <= rom[(character * 10) + {2'd0, line_ptr}][pixel_ptr];
`endif
end
endmodule