P2 VGA Text driver
ozpropdev
Posts: 2,793
Hi All
Here's a VGA text driver that I have been playing with.
Its VGA 800x600 with a 16x32 font (50x18 characters in 16 colors)
Cheers
Brian
Here's a VGA text driver that I have been playing with.
Its VGA 800x600 with a 16x32 font (50x18 characters in 16 colors)
Cheers
Brian
Comments
I ended up doing a bit of dynamic shuffling of color data in aux to get the result I wanted.
When we have 200MHz, there should be enough cycles to use CLU4_RGB24 or even CLU8_RGB24 mode.
Cheers
Brian
I forgot to mention that the driver can easily support 50x37 characters as well.
To achieve the 16x16 font I "cheated" and use every second font line of the 16x32 font.
I doesn't look too bad.
If anyone has time to create a 16x16 font this could be enhanced.
This would also reduce the size of the font table from 16K to 8K!
Cheers
Brian
Because the current Nano update does not support MUL32,GETMULL the following code changes are required.
Comment out the MUL32 and GETMULL lines.
Add two longs named m1,m2 and insert the code below.
' mul32 text_row,#50 * 2 '*100 (2 bytes per character) mov m1,text_row ' x 100 shl m1,#6 mov m2,text_row shl m2,#5 add m1,m2 mov m2,text_row shl m2,#2 add m1,m2 mov text_row,m1Brian
It is possible You made comments in this block.
That show what character every block represents.
I will made me different chars both in X and Y coordinates
' Char x1 word $FFFF,$FFFF,$FFFF,$FFFF,$000F,$000F,$000F,$000F word $000F,$000F,$000F,$000F,$000F,$000F,$000F,$000F word $000F,$000F,$000F,$000F,$000F,$000F,$000F,$000F word $000F,$000F,$000F,$000F,$FFFF,$FFFF,$FFFF,$FFFF ' Char x2 word $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000 word $0000,$0000,$0040,$0060,$0070,$0078,$7FFC,$7FFE word $7FFE,$7FFC,$0078,$0070,$0060,$0040,$0000,$0000 word $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000 ' Char x3 and so onThe attached file might help.
Cheers
Brian
That was all I need
Thanks.