24 Apr
2002
24 Apr
'02
12:23 a.m.
Richard Relater wrote:
Careful now, Ben ... I believe I remember what the
6847 is. It only supported
one character display format. While I agree that the CGA is a piece of crap,
as is any display with fewer than 768 pixels horizontally and 512 vertically
on an NTSC frame, and also including CGA, Herc, and EGA, the 6847 couldn't
manage more than its 256x192 pixels, in what ... 4 colors if you include
black? The entire system timing was heavily dependent on the 6847 and that
peculiar 74LS768 or whatever ( sequential address multiplexer ) without which
they couldn't have built the thing in the size they did.
I run 640x480 where does that fit?? I got a few targa boards kicking
around here
512 x 512 NTSC - 15 bit color.
640 x 200 would give you minimal 80x24 screen with 8x8 bit characters --
nice for playing games if you have a definable character set. I think
the
C64 had this.
What I ment by real display 1) real keyboard 2) real video 80 x 24 upper
and LOWER case too.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html