diff options
Diffstat (limited to 'design')
| -rw-r--r-- | design/vga.v | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/design/vga.v b/design/vga.v index 05a5c60..e69907c 100644 --- a/design/vga.v +++ b/design/vga.v @@ -38,14 +38,13 @@ */ reg [15:0] text_memory [1279 : 0]; - /* - * Enable writes to text_memory using wishbone interface. - * (no reads for now) - */ + /* Enable writes and reads of text_memory using wishbone interface. */ + reg [15:0] data_at_adr; + reg outputting_data; reg ack; - assign DAT_O = {16{powered_on}}; + assign DAT_O = outputting_data ? data_at_adr : {16{powered_on}}; assign ACK_O = ack; assign STALL_O = 1'b0; @@ -58,6 +57,10 @@ else powered_on <= DAT_I != 16'b0; end + + outputting_data <= ADR_I < 1280; + + data_at_adr <= text_memory[ADR_I]; end /* Non-wishbone part - generate 640x480 60Hz VGA output */ |