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From: js@uw-june (Joe Meadows)
Newsgroups: net.micro.amiga
Subject: Re: Help with AbasiC
Message-ID: <134@uw-june>
Date: Tue, 26-Nov-85 12:43:04 EST
Article-I.D.: uw-june.134
Posted: Tue Nov 26 12:43:04 1985
Date-Received: Sat, 7-Dec-85 17:19:52 EST
References: <538@caip.RUTGERS.EDU>
Organization: U of Washington Computer Science
Lines: 39


	In regards to changing the text color, note the two commands
	ASK RGB register,red,green,blue (R-99) and
	RGB register,red,green,blue (R-119)

	register 0 = background screen color
	register 1 = Text color, plus parts of the menu gadgets,
	register 2 = most of the window border,
	register 15 = Block cursor

	Other things of possible interest:
	CHDIR "file-spec" (in the errata sheet) changes your default directory.
	Note however that this doesn't affect commands like DIR, or SHELL,
	which will still refer to the directory you were in when you entered
	basic (at least, I think thats it...)

	For fun I played with the LIBCALL (R-147) function, after
	hand-assembling some 68k code (bleah,choke,gag, where's my development
	kit?!) shoving the assembled code into DATA statements, READing them
	into an array and then using VARPTR to find their address... Pain
	city! (aside, Integers are Longwords (32 bit))
	 For those of you crazy enough to try it :
	LIBCALL <pointer%>, <index%>, <array%>
	where pointer% is either the address of the routine, or a "library
	base pointer", index% is an index into the library (0% for a routine)
	and array% is an array of 16 cells to hold registers D0-D7 followed
	by A0-A7. They give an example in the book using the system variable
	EXECBASE (a pointer to the system Exec library). Apparently your
	on your own to figure out what offsets do what.. If there's any
	interest (You mean, someone might want to Do something from Basic?)
	let me know and after I get my books I'll try and post some more info
	concerning this..

	Personnaly I can't wait for the day companies start shipping their
	computers with a real language, and with real documentation..

	Just another waiting person..
	joe (mr. cheers) meadows.
Cheers