Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!TOPS20.RADC.AF.MIL!GUBBINS
From: GUBBINS@TOPS20.RADC.AF.MIL (Gern)
Newsgroups: comp.sys.zenith.z100
Subject: Z-100 video enhancements
Message-ID: <12502398021.13.GUBBINS@TOPS20.RADC.AF.MIL>
Date: 15 Jun 89 20:43:30 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 19

I just had a neat thought:

If you replace the 64Kx1 DRAMs on the Z-100 video board with 256Kx1 DRAMs,
tie all the pin-1s together, and add some minor logic, you would be easily
be able to support 8 pages of normal video (640x225) or 4 pages in interlace
(640xUpTo 525).   This would allow for some awesome animation effects.
The mods would not be hard to do.   This is what I call Extended Video RAM.

Then by adding additional bit planes of RAM on a piggy backed board also
with 256Kx1 (or 256Kx4) DRAMs, would allow more colors per pixel.  This
is what I call Expanded Video RAM.

Hopefully by the end of THIS summer, I and others will get a clean 
implementation of this. 

Does anyone care?

Gern
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