I was fiddling with the apple2e driver's Machine Configuration/Composite Monitor Type options and I noticed that the B+W/green/amber don't properly show the shift from the high bit.

So if I do this:

HGR
HCOLOR=1
HPLOT 0,0 TO 8,0
HPLOT 0,1 TO 8,1
POKE 8192,PEEK(8192)+128

and if you are in the black and white modes,
the pixels in the top row should have a horizontal shift to them.

[Linked Image from i.imgur.com]

and here's another small program to illustrate:

100 HGR:DATA 1,5,2,6:FOR I = 1 TO 4:READ C:HCOLOR=C:HPLOT 0,I TO 279,I:NEXT

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

and this is the result running the applepc emulator under dosbox

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Last edited by Golden Child; 09/11/17 12:04 PM.