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Conference hydra::amiga_v1

Title:	AMIGA NOTES
Notice:	Join us in the NEW conference - HYDRA::AMIGA_V2
Moderator:	HYDRA::MOORE

Created:	Sat Apr 26 1986
Last Modified:	Wed Feb 05 1992
Last Successful Update:	Fri Jun 06 1997
Number of topics:	5378
Total number of notes:	38326

2245.0. "AmigaBASIC space constraints?" by WJG::GUINEAU () Wed Feb 15 1989 22:04

My roomate asked me to enter this.

He is writing an AmigaBASIC program that has gotten rather large. He say's
that now he wants to  add a few last features and when he add the extra lines,
the program won't run (out of memory error or something like that).

I know he's not running out of RAM since it does the same on my machine (2.5meg).

I haven't looked much but I figure it must be some internal allocation that
basic makes (variable space, stack space?).

Anyone seen this?

John

T.R	Title	User	Personal Name	Date	Lines
2245.1	wild guess	GUCCI::HERB		`Wed Feb 15 1989 23:20`	7
	I have a 1 meg A500 and when I load up basic it says something like 700000 bytes free in system,25000 bytes free in basic. Is 25000 bytes all you can have in basic? Is his program more than 25000 bytes? Matt
2245.2		BAGELS::BRANNON	Dave Brannon	`Wed Feb 15 1989 23:35`	5
	It's been a long while since I tried it, but I believe if you look for the description of the CLEAR command you will see an option for telling basic how much memory it can use. -dave
2245.3		GUCCI::HERB		`Wed Feb 15 1989 23:46`	4
	The Fre command tells you how much memory is availible. Matt
2245.4	Maybe you need more stack	VCSESU::MOORE	Tom Moore MRO1-3/SL1 297-5224	`Thu Feb 16 1989 00:02`	5
	We had a program like that that we got out of Compute Magazine. You had to start basic, ask for more stack or something like that and then load the program. I'll look it up when I get a chance (if someone else doesn't beat me to it). -Tom-
2245.5		WJG::GUINEAU		`Thu Feb 16 1989 10:48`	33
	Tried stack out of Amiga experience. No luck. Then remembered something about the CLEAR command. Sure enough: AmigaBASIC has 3 memory areas it deals with: STACK - for gosubs etc.. DATA SEGMENT - For program and it's variables HEAP - Shared with whole system so CLEAR [,[data-segment-size][,heap]] is the command to set these areas. The default is 25000 data segment bytes. Jeff's program was apparently bigger than that when he started allocating variables. so CLEAR ,30000 Fixed this. FRE(-1) returns remaining size of stack FRE(-2) returns size of heap FRE(anything else) returns remaining size of data segment. You can put CLEAR ,30000 as the first lin in a program (he did). Then use the FRE() statement to keep tabs... John