joel@rochester.UUCP (11/30/84)
From: Joel Seiferas <joel>
It seems to be my year-old piggybacked STB SUPER RIO board that is
incompatible with my new IBM Enhanced Graphics Adapter. If anyone else
has evidence to support or contradict this hypothesis, please let me
know. STB should probably hear about it, too; their number is (214)
234-8750. They have the IBM adapter on order and will look into the
matter when it arrives, hopefully within a week or two.
Incidentally, the new adapter includes almost 16K of new ROM code,
starting at address C0000. For hints on how to use this ROM, one could
disassemble the 8692 bytes of diagnostics code in US1ADG2.DGS, on the
diagnostics diskette (version 2.07).
Joel Seiferas
joel@rochesterjoel@rochester.UUCP (12/09/84)
From: Joel Seiferas <joel>
I randomly tried some invocations of the new EGA's interruption
10H. Function 0 now has several new modes. Without an enhanced
display, of course, I could not observe most of them. Modes 13 and 14
(decimal), respectively, are for 320 x 200 and 640 x 200 graphics,
using a font from a new place. Mode 15 is for 640 x 350 graphics on
the IBM monochrome display. Old mode 6 has been enhanced to provide
color.
There are also new functions. Function 16 (decimal) has something
to do with screen attributes, at least for mode 15. Function 17 has
something to do with changing fonts, at least in monochrome text modes.
Code 1 gives an 8 x 14 font, and code 2 gives a 9 x 8 font. The latter
will be useful in 43-line mode on the monochrome display; but I can't
find how to get to that mode, and the diagnostics do not even show it.
Joel Seiferasral@pyuxqq.UUCP (R A Levenberg) (07/27/85)
Following up on: To: pyuxww!gamma!ulysses!allegra!oliveb!tymix!chengjj Subject: Re: Enhanced Color Graphics on PC-AT I have a brand new AT with Enhanced Monitor, Enhanced Graphics Adapter, and Graphics Memory Expansion Card (this provides for 16 colors instead of just 4). Display resolution is 640h x 350v. Much more clear than the regular color monitor and graphics card. Colors are deep, so that color combinations that you used to have may now be too dark (e.g., brown is really brown, not the almost yellow that it used to be). Some software won't run with the EGA (my Sidekick didn't, but I hear Borland has fixed that). Other software may not have any provision for the EGA, but the trend is to upgrade since high resolution is now much more accessible with normal budgets. Caution: high intensity colors often are so bright that they "smudge", so brightness knob needs to be tuned. This might make the darker colors barely readable. Color combinations that work well: white on blue, black on green, white on red (all normal intensity). You won't want to go back to your old monitor after using this one.