Re: Image Converter for HGR modes (with DHGR file question)

["Bill Buckels" <bbuckels@mts.net>]

"Sheldon Simms" <wsspammy@gmail.com> wrote:

>To anyone reading - is there a preferred file format for DHGR images?

Here's what I do...

http://www.appleoldies.ca/azgraphics33/bmpa2fc.htm

This utility will allow you to convert to  Apple II Double Hi-Res 140 x 192 
x 16 color images from IBM-PC graphics files in the following formats:

CGA 320 x 200 x 4 color BASIC BSAVED IMAGE (.BAS) Files
CGA 320 x 200 x 4 color ZSOFT .PCX Files
EGA 320 x 200 x 16 color Windows .BMP Files

Double Hi-Res Graphics

The double high-resolution display mode that is available for the Apple IIe 
displays 140 columns of color, for which all 16 of the low-resolution colors 
are available. Because the double high-resolution graphics mode provides 
twice the horizontal dot density as standard hi-res graphics does, double 
hi-res requires twice as much memory as does standard hi-res.

The double hi-res display interleaves bytes from the two different memory 
pages (auxiliary and motherboard). Seven bits from a byte in the auxiliary 
memory bank are displayed first, followed by seven bits from the 
corresponding byte on the motherboard. The bits are shifted out the same way 
as in standard hi-res (least-significant bit first).

http://www.appleoldies.ca/azgraphics33/index.htm#doublehi

You might also want to check-out some of my other utilities including 
Clipshop...

http://www.clipshop.ca/

Cheers,

Bill