Re: Interesting graphics hacks?

[Pim Blokland <pDOTblokland@spcgroup.nl>]

Michael A. Balfour wrote:

> The ROM contains $1000 bytes. The last $800
> contain the bit patterns used to draw the graphics.

Gee, I didn't know that. Honestly. I thought I roughly knew what the
hardware was all about, but I didn't know that the bit patterns were
programmable.

> My question about hacking the graphics ROM specifically refers to the
> last $800 bytes.  $400 of these are used for lo-res, and $400 for
> hi-res.  Changing these bytes could change the way things are drawn,

But why $400 for hires? Isn't $100 enough?
I can imagine different bit patterns for main mem than for aux mem, so
that you'd need $200 bytes, but that still leaves $200 bytes of unknown
territory. Hm, color and B&W maybe?

-- 
Pim Blokland
if replying by e-mail, replace the DOT in my name with a dot.