vfoster@uok.UUCP (01/15/86)
/* Written 2:00 pm Jan 6, 1986 by gordon@alberta.UUCP in uok.UUCP:net.micro.appl */
/* ---------- "Double Hi-Resolution Graphics on II" ---------- */
Some time ago I posted a request for information on the use of double
hi-resolution graphics with the Apple IIe. The response was overwhelmingly
non-existant.
Over the Xmas holiday I devoted several hours investigation to the soft-switchesindicated by my IIe Reference Manual. They did not elicit the desired
responses. The manual is unclear, non-specific, and proffers no examples.
Has anyone out there examined this supposed feature? Can anyone explain how
to use it, either from Basic, or Machine Language level. Does anyone know
if certain models of IIe might be lacking this feature? Can anyone recommend
an article, text, person, which/who can supply this information?
Any assistance with this problem would be greatly appreciated.
G.H.A.
/* End of text from uok.UUCP:net.micro.appl */
The only thing that I have come across in the area of double hi-res
is through the Extended 80-Column Text Card supplement. On page 11
it reads :
Two things to obtain double high-resol. diplay:
- Install a jumper to connect the two Molex-type pins on the
extended 80-column text card
- Turn on the Annunciator 3 soft switch along with the switches
that select the 80-column display and high resolution graphics.
This works only on an Apple //e with the Rev B (and later)
main logic board, identified by a B as the last letter of the
part number on the back of the board. ... This uses the
auxiliary memory in the extended to produce more 'dots' in
the same manner as the 80 columns are generated.
I don't know if this helped you any. I think that the only way to do
this is with an 80-column extended memory card. Bye.
Vincent Foster
Univ. of Oklahoma