[comp.sys.dec.micro] Rainbow Graphics help needed

MARSDEN@ecs.umass.edu (Ben Marsden) (09/23/89)

Hi to all!

   I'd like to ask for some Rainbow help.  But as this is my first post
to this group, please first let me thank all those who have submitted 
much useful information, and donated their efforts, to this group and the
Rainbow.

   I've been given a 100B since I now have space, but no funds (new house 
:-).  It has a 5mb hard disk (oh well), and a graphics board.  I've upgraded
memory to max (896), and bought MS/DOS 3.10b and Code Blue from S.S. --
thanks to info from this group.  (I also have the IBM character ROM, but
haven't installed it yet.)  And I have  an LA50 printer.

   I'm writing my own graphics packages (for fun) on a VAX cluster from the
ground up, which includes device drivers (ReGIS & QMS now, hope to add
other drivers later).  I'd like to download them and run them on my RB too.
I see no problem with the LA50, but being fairly pc ignorant, am curious 
about accessing RB screen graphics.  I need basic tools: access to pixels,
access to a few vector graphics routines if they exist, and access to some
locator device (crosshairs moveable with the arrow keys, I'd guess).  The
documentation I got (as I recall) included something that runs under CP/M, 
but I don't want to run CP/M for several reasons.  I've written my programs
in Pascal, but plan to convert them to C as well.  (I have the Mark Williams
C compiler which runs under CP/M also, but would prefer only to use it as 
a last resort.)

(So finally) my questions:
-- How do I access the RB graphics capabilities under MS/DOS? (I've done some
   assembly language (6502? *old* anyway!) programming, so am rusty, but not
   fearful, if its required -- except I have no RB assembly language documen-
   tation either.)

-- Am I better off getting Turbo Pascal (4.0) or Turbo C (2.0) for this?
   (I'll probably do most of my editing using SEDT so mostly want compiler
   and debugging capabilities.)  I have no experience with any Turbo products.

-- I've seen mentioned in this group something called "Poly-ReGIS" for the
   Rainbow.  What is this?  How can I get it?  And how much will it cost??

Other related questions:

-- I currently use LCTerm (and the built-in vt100 emulator) to dial in to
   work from home, but believe I've seen mentioned VT240 terminal emulators
   for the RB.  Where might I find such an animal?

-- And finally, rumor has it that Autocad was originally developed on a
   Rainbow.  Does anyone know if there is any truth to this? And if so, are
   there any old PD versions of it kicking around?

Again, my thanks to George, Alan, Rob, and all the others who've contributed
(unkowingly!) to getting my own efforts off the ground.  I won't be writing
anything like SCRAM anytime soon, but I hope someday I'll have something
worth contributing in return!

-- Ben

--------------------------------------------------------------------------
Ben Marsden                                  Engineering Computer Services
internet:  marsden@ecs.umass.edu             100 Marcus Hall / UMass
BITNet  :  marsden@umaecs                    Amherst, MA   01003